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Mettler Toledo VP6-ST/20m Analog Sensor Signal Cable | Order No. 52300141

Mettler Toledo VP6-ST/20m (Order No. 52300141) analog sensor signal cable, VP6 waterproof plug (IP68) to pH/ORP/DO/conductivity sensor, open end to transmitter. 20m length, 6-core shielded, color-coded, -30 to 70°C, PVC jacket, compatible with M300/M400 transmitters. Order available.
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Product Details

1. Product Overview

The Mettler Toledo VP6-ST/20m (Order No. 52300141) is an analog sensor signal cable specifically designed for industrial process analytical instruments. It belongs to the VP6 (VarioPin 6) series standard sensor connection cable, used to connect analog sensors with VP6/VarioPin connector (such as pH electrodes, ORP electrodes, dissolved oxygen sensors, conductivity sensors, etc.) to Mettler Toledo M-series transmitters or other compatible analog transmitters.

One end of the cable is a VP6 (VarioPin) quick-connect waterproof plug, which directly inserts into the VP6 interface on the sensor head and is secured by rotating the lock nut. The connection is reliable with IP68 protection rating, suitable for use in humid, submerged, outdoor and other harsh environments. The other end is an open end with each core wire distinguished by standard colors, which can be directly connected to the transmitter's terminal block for convenient on-site installation and wiring.

The VP6-ST/20m cable has a length of 20 meters, suitable for applications where the sensor installation location is far from the transmitter, such as large reactors, high-level storage tanks, outdoor open channels, remote pipeline monitoring points, etc. The cable contains multi-core signal wires + shielding layer, which can simultaneously transmit pH/ORP millivolt signals, reference signals, temperature sensor (PT100/PT1000) signals and solution ground (SG/Liquid Earth) signals, meeting the signal transmission requirements of various Mettler Toledo analog sensors.

The cable jacket is made of weather-resistant PVC material, with good oil resistance, acid and alkali resistance, UV resistance and bending resistance, adapting to complex industrial environments. The operating temperature range is -30°C to +70°C, allowing normal use in both severe cold and high temperature environments. The cable is overall shielded, effectively suppressing electromagnetic interference (EMI) and radio frequency interference (RFI) in industrial fields, ensuring stable transmission of millivolt-level weak signals such as pH/ORP, and improving measurement accuracy and stability.

The VP6-ST series is the most widely used standard sensor cable series in Mettler Toledo Process Analytics. Common lengths include 3m (52300103), 5m (52300105), 10m (52300108) and 20m (52300141). For higher temperature conditions (exceeding 70°C), the VP8-ST series high-temperature cable can be selected. The VP6-ST cable is fully compatible with Mettler Toledo InPro series, EasyFerm series, OxyFerm series, Conducell series and other sensors with VP6 connector, and is an indispensable connection accessory in process analytical instrument systems.

2. Specifications

表格

Parameter Value
Brand Mettler Toledo (Switzerland)
Model VP6-ST/20m
Order No. / Material No. 52300141
Product Type Analog Sensor Signal Cable
Cable Series VP6-ST (VarioPin 6, Standard)
Cable Length 20 m
Connector End 1 VP6 (VarioPin) waterproof plug, IP68, rotary lock
Connector End 2 Open end, color-coded, to transmitter terminals
Number of Cores 6 signal cores + shielding layer
Core Color & Function A Black=Glass/ORP; B Red=Reference; C Grey=Temp T3 (short with E for 3-wire); D Blue=Solution Ground SG/Liquid Earth; E White=Temp sensor; F Green=Temp sensor
Shielding Overall shielding, anti-electromagnetic interference
Protection Rating IP68 (VP6 connector end)
Operating Temperature -30 °C ~ +70 °C
Jacket Material PVC (weather-resistant, oil-resistant, acid/alkali-resistant)
Rated Voltage 300V / 600V (reference)
Compatible Sensors pH/ORP/DO/conductivity and other analog sensors with VP6/VarioPin connector
Compatible Transmitters Mettler Toledo M300/M400/M700/M800, pH2100e and other analog transmitters
Explosion-proof Adaptation Can be used with intrinsically safe sensors and IS transmitters/barriers (system IS parameters to be confirmed)
Installation VP6 plug inserts into sensor and tightened, open end connects to transmitter terminal block
Common Series Models VP6-ST/3m (52300103), VP6-ST/5m (52300105), VP6-ST/10m (52300108)
High Temperature Alternative VP8-ST series (high temperature type, for >70°C conditions)
Weight To be confirmed (reference approx. 1.5-2.5kg)
Country of Origin To be confirmed (Mettler Toledo global manufacturing)
HS Code To be confirmed (reference 85444290)
Stock Status Order available
Warranty 12 months

3. Key Features

  1. VP6 Waterproof Plug, IP68 Protection, Reliable Connection — Sensor end uses VP6 (VarioPin) quick-connect waterproof plug with rotary lock nut, firm connection not easy to loosen, IP68 protection rating, long-term reliable use in humid, rainy, submerged, outdoor harsh environments, suitable for chemical, water treatment, outdoor open channel and other wet conditions.
  2. 20m Length, Adaptable to Remote Installation — 20-meter cable length, suitable for applications where sensor and transmitter are far apart, such as large reactor tops, high-level storage tanks, outdoor open channel monitoring, remote pipeline analysis points, avoiding additional wiring or junction boxes due to insufficient distance, reducing signal attenuation and failure points.
  3. Multi-core Signal Transmission, Compatible with Various Analog Sensors — Internal 6-core signal wires + shielding layer, can simultaneously transmit pH/ORP millivolt signals, reference signals, PT100/PT1000 temperature signals and solution ground (SG) signals, compatible with Mettler Toledo InPro series pH/ORP electrodes, InPro6800 dissolved oxygen sensors, Conducell/InPro7100 conductivity sensors and other analog sensors with VP6 connector, one cable meets multiple sensor connection needs.
  4. Standard Color Coding, Easy Wiring Less Errors — Open end cores are color-coded per Mettler Toledo standard (black/red/grey/blue/white/green), corresponding to clear signal functions. On-site wiring only requires matching the color definition in the transmitter manual, no additional measurement and identification needed, reducing wiring errors and improving installation efficiency.
  5. Overall Shielding, Anti-interference Stable Signal — Cable with overall shielding layer effectively suppresses electromagnetic interference (EMI) and radio frequency interference (RFI) in industrial fields, ensuring pH/ORP and other millivolt-level weak analog signals are not interfered during 20-meter long-distance transmission, stable, accurate, low-noise measurement, especially suitable for strong electromagnetic interference environments near inverters, motors, high-power equipment.
  6. PVC Weather-resistant Jacket, Adapts to Complex Industrial Environments — Cable jacket made of weather-resistant PVC material with good oil resistance, acid and alkali resistance, UV resistance, bending resistance and wear resistance, usable in -30°C to +70°C wide temperature range, adapting to chemical plants, outdoor exposure, wastewater treatment plants, food workshops and other industrial environments, cable not easy to age and crack, long service life.
  7. Plug-and-play, Convenient Installation and Maintenance — VP6 plug end only needs to align with sensor interface, insert and tighten lock nut to complete connection, no tools needed, plug-and-play. Open end directly connects to transmitter terminal block, cable replacement only requires loosening terminals and rewiring, convenient maintenance. Sensor and cable separated design allows separate replacement when sensor or cable is damaged, reducing maintenance cost.
  8. Mettler Toledo Original Quality, Compatibility Guaranteed — Mettler Toledo original VP6-ST cable, strictly matched and tested with full range of Mettler Toledo analog sensors with VP6 connector and M-series transmitters. Electrical performance, impedance matching, shielding effect, waterproof performance all meet design requirements, ensuring sensor measurement accuracy and system stability, avoiding signal interference, inaccurate measurement, protection failure caused by non-original cables.
  9. Wide Temperature Design, Usable in Severe Cold and High Heat — Operating temperature range -30°C to +70°C, normal use in northern winter outdoor severe cold and southern summer high temperature environments. Cable jacket does not harden and crack at low temperature, does not soften and deform at high temperature, adapting to global climate conditions and industrial site temperature changes.
  10. Multiple Lengths Optional, Flexibly Meets Different Scenarios — VP6-ST series provides 3m (52300103), 5m (52300105), 10m (52300108), 20m (52300141) and other standard lengths, flexibly selected based on actual distance between sensor and transmitter, avoiding cable waste from excessive length or installation impossibility from insufficient length. For high temperature conditions exceeding 70°C, VP8-ST high temperature cable can be selected as alternative.

5. Model Explanation

Product Model: VP6-ST/20m

Order No.: 52300141

Product Description: VP6 series standard analog sensor signal cable, 20m length, VP6 waterproof plug (IP68) to sensor at one end, open end to transmitter at the other, 6-core shielded, -30 to 70°C, PVC jacket

Model Code Breakdown VP6-ST/20m:

表格

Code Segment Meaning Description
VP6 Connector Type VarioPin 6, 6-core variable pin waterproof plug, IP68
ST Cable Type Standard, standard cable (PVC jacket, -30 to 70°C)
20m Cable Length 20 meters

VP6-ST Series Common Models Comparison:

表格

Model Order No. Length Description
VP6-ST/3m 52300103 3m Short distance, transmitter adjacent to sensor
VP6-ST/5m 52300105 5m Short distance, near control cabinet
VP6-ST/10m 52300108 10m Medium distance, cross-equipment installation
VP6-ST/20m 52300141 20m This product, long distance, remote monitoring point

VP6 vs VP8 Series Difference:

表格

Comparison VP6-ST (this product) VP8-ST (high temperature)
Jacket Material PVC High temperature dedicated material
Operating Temperature -30 to +70°C Higher temperature range
Application Standard industrial conditions High temperature conditions (>70°C)
Connector VP6 VP8
Price Lower Higher

Core Color and Function Definition (VP6 Cable Standard):

表格

Pin Core Color Signal Function Description
A Black Glass electrode / ORP element pH glass membrane signal or ORP platinum electrode signal
B Red Reference electrode Ag/AgCl reference electrode signal
C Grey Temperature sensor T3 Short with E for 3-wire PT100
D Blue Solution Ground SG / Liquid Earth / AUX Solution ground/auxiliary electrode, eliminates ground loops
E White Temperature sensor PT100/PT1000 temperature signal terminal
F Green Temperature sensor PT100/PT1000 temperature signal terminal
— Shield Shield ground To transmitter shield terminal / ESD shield

Compatible Sensor Examples (with VP6 connector):

  • pH electrodes: InPro3250, InPro4260, InPro4501, InPro4800/SG, InPro4010, EasyFerm Plus, etc.
  • ORP electrodes: InPro series ORP electrodes
  • Dissolved oxygen sensors: InPro6800, OxyFerm FDA, etc.
  • Conductivity sensors: Conducell 4UxF, InPro7100-VP, InPro7108-VP, etc.

Compatible Transmitter Examples:

  • Mettler Toledo M300 series (single/multi-channel)
  • Mettler Toledo M400 series (single/multi-channel)
  • Mettler Toledo M700 series (multi-parameter)
  • Mettler Toledo M800 series (multi-channel multi-parameter)
  • Mettler Toledo pH 2100e, etc.
  • Other third-party transmitters supporting analog pH/ORP/DO/conductivity input

6. Why Choose Us

  1. Professional Procurement Channel, Quality Guaranteed — All Mettler Toledo cables obtained through professional procurement channels, ensuring genuine Mettler Toledo original products with product identification and quality documents, 12-month quality warranty. Appearance inspection, model confirmation, order number verification, continuity test and packaging check performed before shipment, ensuring delivered products intact, model-accurate, electrical performance qualified.
  2. Worldwide Delivery, Professional Instrument Logistics — Supports DHL, FedEx, UPS and other international couriers, global delivery available. Cables are coiled packaged with moisture and dust protection, avoiding excessive bending, plug damage and jacket scratching during transport. Expedited logistics and customs clearance services available per project requirements, delivery to 200+ countries worldwide.
  3. Professional Technical Support, Full-process Service from Selection to Wiring — Provides cable selection consultation (confirming sensor connector type VP6/VP8/K8S, required length, operating temperature, explosion-proof IS requirements, transmitter interface type), core wiring guidance (color-to-function mapping, terminal arrangement, shield grounding method, 3-wire/2-wire temperature wiring), fault diagnosis (signal interference/measurement jumping/poor contact/water ingress short circuit cause analysis) and length customization advice, helping users correctly select, install and maintain.
  4. Flexible Procurement, Multi-length Bulk Discounts — Supports single cable procurement and bulk project orders, full VP6-ST series lengths (3m/5m/10m/20m) available, tiered pricing discounts with quantity. Can provide process analytical instrument spare parts packages for water treatment/chemical/pharmaceutical/power industries (pH electrode + cable + transmitter + calibration solution combination) and annual spare parts framework agreements, helping users optimize spare parts inventory and procurement cost.
  5. Pre-shipment Verification, Test Report Available — Appearance inspection, packaging verification, model confirmation, order number check, VP6 plug appearance check, core continuity test, insulation resistance test and shield continuity test performed before shipment; cable test report available if necessary, ensuring delivered cable model-accurate, in good condition, electrical performance qualified, no open/short circuit and poor contact issues.

7. Frequently Asked Questions (FAQ)

Q1: What is VP6-ST/20m cable? What is the difference from VP6-ST/10m? What sensors can it connect?

A: The VP6-ST/20m (Order No. 52300141) is a Mettler Toledo VP6 series standard analog sensor signal cable, 20 meters long, used to connect analog sensors with VP6/VarioPin connector to transmitters.

Basic Information:

  • Brand: Mettler Toledo (Switzerland)
  • Model: VP6-ST/20m
  • Order No.: 52300141
  • Type: Analog sensor signal cable
  • Length: 20 meters
  • End 1: VP6 waterproof plug (IP68, to sensor)
  • End 2: Open end (color-coded, to transmitter terminals)
  • Operating temperature: -30 to 70°C
  • Cores: 6-core + shielding

Difference from VP6-ST/10m:

The only difference is length; all other electrical performance, connector type, core definition, jacket material are identical:

表格

Comparison VP6-ST/10m VP6-ST/20m (this product)
Order No. 52300108 52300141
Length 10m 20m
Connector VP6 (IP68) VP6 (IP68)
Cores 6-core + shield 6-core + shield
Temp Range -30 to 70°C -30 to 70°C
Suitable Distance Sensor to transmitter ≤10m Sensor to transmitter ≤20m
Price Lower Slightly higher

What sensors can it connect?

The VP6-ST cable can connect all Mettler Toledo analog sensors with VP6/VarioPin connector, including:

  • pH electrodes: InPro3250, InPro4260, InPro4501, InPro4800/SG, InPro4010, InPro3300, EasyFerm Plus, InPro2000i (analog version), etc.
  • ORP electrodes: InPro series ORP electrodes (with VP6 connector)
  • Dissolved oxygen sensors: InPro6800, OxyFerm FDA, InPro6950, etc. (with VP6 connector)
  • Conductivity sensors: Conducell 4UxF, InPro7100-VP, InPro7108-VP, etc.
  • Others: residual chlorine, ozone, turbidity and other analog sensors with VP6 connector

Notes:

  • ISM digital sensors with K8S connector (e.g., InPro4800i) cannot use VP6-ST cable; they need AK9/AS9 K8S cables
  • High temperature sensors with VP8 connector need VP8-ST cable
  • If unsure about your sensor connector type, please provide the sensor model and we will help confirm the matching cable

Q2: How do the VP6 cable core colors correspond? How to wire to the transmitter? Where does the shield wire connect?

A: The VP6-ST cable open end has 6 signal wires + 1 shielding layer, each wire with standard color coding corresponding to different signal functions. When wiring, please refer to the terminal definition in the transmitter manual.

VP6 Cable Core Color and Function Table:

表格

Core Color Signal Function pH Electrode Application ORP Electrode Application Notes
Black Glass/measuring electrode pH glass membrane signal (mV) ORP platinum electrode signal (mV) Main measurement signal, high impedance, to transmitter measuring input
Red Reference electrode Ag/AgCl reference signal Ag/AgCl reference signal To transmitter reference input
Grey Temperature T3 PT100 3rd wire (short with white for 3-wire) Same Not used for 2-wire PT1000, insulate and leave floating
Blue Solution Ground SG/Liquid Earth/AUX Solution ground platinum ring signal Same Only for electrodes with SG; to transmitter SG/AUX terminal; not used for electrodes without SG
White Temperature sensor + PT100/PT1000 one end Same To transmitter temperature input
Green Temperature sensor - PT100/PT1000 other end Same To transmitter temperature input
Shield Shield ground To transmitter shield terminal / ESD shield Same Single-end grounding, usually at transmitter side, not at sensor side

Wiring Steps:

  1. Confirm transmitter terminal block: Refer to transmitter manual, find pH/ORP input terminals, temperature input terminals, SG/AUX terminals and shield terminal locations and numbers
  2. Strip cable: Strip about 50-80mm of outer jacket at open end, exposing cores and shield; strip about 5-8mm insulation from each core to expose copper
  3. Crimp terminals (optional): If needed, crimp wire ferrules on core ends for easy insertion into terminal block
  4. Wire by color correspondence:
    • Black → Transmitter pH/ORP measuring input (Glass / Measuring electrode)
    • Red → Transmitter reference input (Reference)
    • White + Green → Transmitter temperature input (PT100/PT1000, note polarity; PT1000 usually non-polar but follow manual)
    • Grey → For 3-wire PT100, short with white then connect; for 2-wire PT1000, not used, insulate with tape and leave floating
    • Blue → Transmitter solution ground SG/AUX terminal (only for electrodes with SG; for electrodes without SG, not used, insulate and leave floating)
    • Shield → Transmitter shield terminal or ESD shield (usually there is a dedicated shield terminal inside transmitter housing)
  5. Tighten terminals: Use screwdriver to tighten terminal screws, gently pull each wire to confirm firm connection, no looseness
  6. Check: Confirm no short circuit (adjacent core copper not touching), no loose connection, shield not shorted to signal wires
  7. Power on test: Turn on transmitter power, check if measurement value is normal, temperature display is correct, no alarms

Where does the shield wire connect?

  • The shield should be single-end grounded, usually at the transmitter side, connected to the transmitter's shield terminal (Shield) or ESD shield
  • The sensor side (inside VP6 plug) shield is usually connected to the sensor housing through the plug structure; do not additionally ground it to avoid ground loops
  • If the transmitter has no dedicated shield terminal, connect the shield to the transmitter's analog ground (Analog GND) or protective earth (PE) terminal
  • Do not leave the shield floating unconnected, otherwise shielding effect is greatly reduced
  • Note: The shield can only be grounded at one end, do not ground both ends, otherwise ground loop current will form and introduce interference

Important notes:

  • Terminal arrangement and numbering may vary by transmitter model; always follow your specific transmitter manual
  • pH/ORP signals are high-impedance millivolt signals; keep terminals clean and dry during wiring, avoid direct hand contact with copper (skin oils and salts may affect high-impedance measurement)
  • In intrinsically safe explosion-proof systems, cable wiring must comply with explosion-proof regulations, use explosion-proof junction boxes, operated by qualified personnel

Q3: Will the 20m cable signal attenuate? Will measurement be inaccurate? What is the maximum usable length?

A: A 20m VP6-ST cable under normal use conditions has very little signal attenuation and does not affect measurement accuracy, and can be used with confidence.

Why 20m is not a problem?

  1. pH/ORP signals are high-impedance voltage signals: The pH glass electrode outputs millivolt-level voltage signals (usually -400 to +400mV), with very high electrode internal resistance (usually 100MΩ to 1GΩ). The transmitter's pH input impedance is also extremely high (≥10^12Ω), so the signal current is minimal (nanoamp level), and the voltage drop on cable resistance is negligible. The 20m cable resistance (usually a few ohms to tens of ohms) has almost no attenuation effect on the voltage signal.
  2. Temperature signal is a resistance signal: PT100/PT1000 are resistance temperature sensors, and the transmitter calculates temperature by measuring resistance. The 20m cable wire resistance (about 0.5-2Ω per core) is very small relative to PT1000 (1000Ω base) (0.05%-0.2%), and transmitters usually support cable resistance compensation or 3-wire/4-wire connection to eliminate wire resistance effects, so temperature measurement is also accurate.
  3. Shielding anti-interference: The VP6 cable has overall shielding, which effectively suppresses external electromagnetic interference during 20m long-distance transmission, ensuring signal stability.

When might problems occur?

Although 20m is fine, attention may be needed in the following special situations:

  1. Strong electromagnetic interference environment: If the cable passes near high-power inverters, motors, transformers, high-frequency equipment and other strong interference sources, and shielding grounding is poor, signal interference may occur (measurement value jumping, high noise). Recommendation: Route cable away from strong interference sources, reliably single-end ground the shield, use metal cable tray or steel conduit shielding if necessary.
  2. Poor cable quality or damage: Non-original cables or cables with damaged jacket, water ingress, broken cores may cause signal abnormalities. Recommendation: Use Mettler Toledo original VP6-ST cable, avoid excessive bending during installation (bending radius ≥5 times cable diameter), avoid heavy object crushing, avoid sharp object scratching.
  3. Connector water ingress or poor contact: If the VP6 plug is not tightened, O-ring is damaged, or sensor interface has impurities, water ingress short circuit may occur, causing measurement abnormality. Recommendation: Check O-ring integrity during installation, clean sensor interface, tighten lock nut (hand-tight only, do not over-tighten with tools).
  4. Extremely high precision temperature measurement: If temperature measurement accuracy requires ±0.1°C or better, the 20m cable wire resistance may need compensation. Recommendation: Use 3-wire PT100 connection (grey wire shorted with white), or set cable resistance compensation value in transmitter.

What is the maximum usable length?

The Mettler Toledo VP6-ST series standard length maximum is 20 meters (52300141). For requirements exceeding 20 meters:

  • Generally, self-splicing extension cables are not recommended, as joints increase failure points and interference risks
  • If more than 20m is truly needed, consult Mettler Toledo technical support to evaluate signal transmission and anti-interference solutions
  • In some applications, consider installing the transmitter near the sensor (e.g., field wall-mounted transmitter), then transmit over long distance to control room via 4-20mA or digital communication (HART/Modbus/Profibus), which is more reliable
  • 4-20mA analog signals and digital communication signals have far better anti-interference capability and transmission distance than pH millivolt signals

Simply put: A 20m VP6-ST cable is completely fine, measurement accurate, signal attenuation negligible. As long as properly installed, well-shielded, and away from strong interference sources, it can be used stably. For more than 20m, recommend transmitter near sensor + 4-20mA/digital signal remote transmission.

Q4: Does this cable have explosion-proof certification? Can it be used in hazardous areas? How to pair with intrinsically safe electrodes?

A: The VP6-ST/20m cable itself is a passive connection cable and usually does not have a separate explosion-proof certification, but it can be used in hazardous areas in combination with intrinsically safe (Ex ia) sensors and intrinsically safe transmitters/safety barriers to form a complete intrinsic safety explosion-proof system.

Role of cable in explosion-proof system:

  • The VP6-ST cable is a passive component that does not generate energy itself, only transmits weak sensor signals
  • The safety of the explosion-proof system is jointly constituted by intrinsically safe sensor + intrinsically safe transmitter/safety barrier + connection cable, and the entire system needs to meet intrinsic safety parameter matching requirements
  • Cable parameters such as capacitance, inductance, and resistance affect the safety parameters of the intrinsic safety system, so when used in an intrinsic safety system, it is necessary to confirm that cable parameters are within the allowable range of the safety barrier

Can it be used in hazardous areas?

Yes, but the following conditions must be met:

  1. Sensor must be intrinsically safe: e.g., Mettler Toledo InPro4800/SG and other pH electrodes with ATEX/IECEx/FM intrinsic safety certification
  2. Transmitter/safety barrier must be intrinsically safe: Transmitter must have corresponding explosion-proof certification, or be connected through zener barrier / isolated barrier
  3. Cable parameters must match: Cable length, capacitance, inductance, resistance must be within the maximum parameters allowed by the safety barrier or IS transmitter
  4. Must use IS cable (if required): Some explosion-proof regulations require blue IS-marked cable; whether VP6-ST cable meets this needs to be confirmed according to project specifications
  5. Installation must comply with explosion-proof regulations: Use explosion-proof junction boxes, cable gland sealing, single-end grounding, separate routing from non-IS cables, etc.

VP6-ST/20m parameter considerations in IS systems:

  • The capacitance and inductance of a 20m cable are larger than shorter cables, and it is necessary to confirm whether they are within the maximum external inductance (Lo) and maximum external capacitance (Co) allowed by the safety barrier
  • Generally, the capacitance of a 20m PVC cable is about 200-400nF (depending on cable specification), and inductance is about tens of microhenries, which most industrial safety barriers can support
  • If safety barrier parameter margin is small, possible options: ① Shorten cable length; ② Use low-capacitance IS cable; ③ Consult Mettler Toledo or safety barrier manufacturer to confirm system IS compatibility

How to pair with intrinsically safe electrodes?

Taking Mettler Toledo InPro4800/SG/225/PT1000 (Ex ia IIC T6) IS pH electrode as an example:

  1. Confirm electrode explosion-proof rating: InPro4800/SG has ATEX/IECEx Ex ia IIC T6/T5/T4/T3 Ga/Gb and FM IS certification
  2. Select IS transmitter or safety barrier:
    • Option A: Use Mettler Toledo M300/M400 IS transmitter (with explosion-proof certification), direct connection
    • Option B: Ordinary transmitter + zener barrier / isolated barrier (e.g., P+F, MTL, Turck and other brand barriers), barrier installed in safe area (control room), field side connects IS electrode and cable
  3. Confirm cable length: The capacitance/inductance parameters of the 20m VP6-ST cable need to be within the allowable range of the safety barrier; if unsure, please provide the safety barrier model and we will help calculate
  4. Wiring: Connect to transmitter/barrier terminals by core color correspondence, shield single-end grounded (safe side)
  5. Explosion-proof installation:
    • Field junction box must be explosion-proof type (Ex d/Ex e)
    • Cable entry device uses appropriate explosion-proof gland, well sealed
    • IS cables and non-IS cables routed separately, not sharing cable trays/terminal boxes
    • Wiring must be done in de-energized state, by qualified explosion-proof professionals

Important notes:

  • Design, installation, and maintenance of explosion-proof systems must be performed by qualified professionals with explosion-proof qualifications, strictly complying with GB 3836 (China), IEC 60079 (international), ATEX (EU) and other explosion-proof standards
  • The overall safety of the IS system requires parameter calculation and confirmation by the barrier manufacturer or explosion-proof authority, and cannot be judged solely by the cable and electrode
  • For explosion-proof application requirements, it is recommended to provide sensor model, transmitter/barrier model, cable length, hazardous area classification (Zone 0/1/2) and gas group before procurement, and we can help confirm system compatibility

Q5: Is this product in stock? What is the lead time? What is the price?

A: This model is currently in Order Available status. The VP6-ST series is a commonly used standard accessory for Mettler Toledo Process Analytics with large usage, but specific inventory fluctuates with market.

  • Lead time: Standard lead time 3-6 weeks (ordered through professional procurement channels or allocated from global inventory). Some common lengths (3m/5m/10m) may be in stock; the 20m specification has relatively less stock, specific subject to formal quotation confirmation.
  • Price: Specific price subject to our formal quotation, depends on purchase quantity, supply channel, whether includes technical service. Mettler Toledo original cables are mid-to-high end accessories, moderate price, bulk procurement enjoys tiered discounts.
  • Expedited service: For urgent needs (e.g., process fault emergency repair, cable damage causing measurement interruption, project commissioning emergency), we can try to coordinate global stock inventory or expedited ordering, specific please contact sales team.
  • Please indicate required quantity, matching sensor model, required length, application industry, desired delivery time and destination when inquiring; we will coordinate fastest delivery solution and optimal price.
  • If you need to purchase matching Mettler Toledo pH/ORP/DO/conductivity sensors, M-series transmitters, mounting wells, calibration buffers and other accessories simultaneously, we can provide complete process analytical measurement system combined quotation with more favorable prices.
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