BS-EC350 Liquid-Cooled Conductivity Sensor ±1.5%FS

Q: What is the BS-EC350 Liquid-Cooled Conductivity Sensor used for?

The BS-EC350 series is a conductivity sensor dedicated to liquid cooling systems. It continuously monitors the conductivity of coolants in data center liquid cooling, energy storage and high-power electronic cooling applications, tracking ion concentration and coolant purity to provide early warning of contamination, corrosion risk and coolant degradation.

Q: What measuring ranges are available for the BS-EC350?

Five versions are available: BS-EC350A (0-20 μS/cm), BS-EC350B (0-200 μS/cm), BS-EC350C (0-1000 μS/cm), BS-EC350D (0-2000 μS/cm) and BS-EC350E (2-20000 μS/cm), with cell constants K=0.01, K=0.1 and K=1 respectively. All share ±1.5%FS accuracy and PT1000 temperature compensation.

Q: What media is the BS-EC350 compatible with?

The BS-EC350 is compatible with pure water, deionized water, and PG25/EG25 (propylene glycol / ethylene glycol) coolants commonly used in liquid cooling systems. Its 316L stainless steel body with anti-polarization technology ensures stable long-term measurement.

Q: What output signals does the BS-EC350 provide?

The BS-EC350 offers optional 4-20mA analog or RS485 digital output with Modbus RTU protocol, powered by 18-27 VDC (models A/B), 9-27 VDC (models C/D) or 12-24 VDC (model E). A 5 m cable is standard, extendable to 10 m.

Q: How do I select the right BS-EC350 range for data center liquid cooling?

Industry standards such as T/GDSS 021-2026 require coolant conductivity below 10 μS/cm (with fluctuation under 2 μS/cm) after flushing data center liquid cooling pipelines. The BS-EC350A (0-20 μS/cm, K=0.01) covers this range with the best resolution; BS-EC350B (0-200 μS/cm) suits general coolant monitoring, while models C/D/E handle higher-conductivity glycol mixtures and industrial cooling media.

Why Conductivity Monitoring Matters in Liquid Cooling

Conductivity directly reflects the ion concentration and purity of a coolant. Rising conductivity signals contamination ingress, additive depletion or corrosion byproducts building up in the loop — all of which accelerate metal corrosion, electrochemical migration and leakage-current risks in cold plates and manifolds.

For data center liquid cooling pipelines, industry standards such as T/GDSS 021-2026 require conductivity to stay below 10 μS/cm with fluctuation under 2 μS/cm after system flushing. Continuous online monitoring with the BS-EC350 makes this acceptance criterion measurable at any moment, not just during commissioning.

Product Overview

Bebur BS-EC350 Liquid-Cooled Conductivity Sensor with 316L stainless steel body and 3/4 NPT process connection

BS-EC350 with standard 5 m cable

BS-EC350 at a Glance

Measuring Ranges0–20 / 0–200 / 0–1000 / 0–2000 / 2–20000 μS/cm
Accuracy±1.5%FS
Cell ConstantsK=0.01 / 0.1 / 1
T90 Response≤ 60 seconds
Suitable MediaPure water, DI water, PG25/EG25
Temp. CompensationPT1000, automatic
Output4-20mA / RS485, Modbus RTU
Process Connection3/4 NPT

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Key Features

Anti-Polarization Technology

Advanced anti-polarization design maintains electrode stability and measurement accuracy over long-term immersion.

Signal Isolation & Anti-Interference

Signal isolation technology effectively eliminates external interference, ensuring precise and stable performance even in complex electromagnetic environments.

Five Range Options

From 0-20 μS/cm ultrapure monitoring up to 2-20000 μS/cm, one series covers pure water loops and glycol mixtures alike.

Automatic Temperature Compensation

Built-in PT1000 compensates conductivity readings across the working temperature range.

Broad Media Compatibility

Compatible with propylene glycol, ethylene glycol and deionized water coolants used in liquid cooling systems.

Easy Installation

3/4 NPT process connection with compact 316L stainless steel body; 5 m cable standard, extendable to 10 m.

Model Selection — Five Ranges

Parameter	BS-EC350A	BS-EC350B	BS-EC350C	BS-EC350D	BS-EC350E
Measuring Range	0–20 μS/cm	0–200 μS/cm	0–1000 μS/cm	0–2000 μS/cm	2–20000 μS/cm
Temperature Range	0–100 °C	0–100 °C	0–100 °C	0–100 °C	0–60 °C
Cell Constant	K=0.01	K=0.01	K=0.1	K=0.1	K=1
Power Supply	18–27 VDC	18–27 VDC	9–27 VDC	9–27 VDC	12–24 VDC
Dimensions	Φ16 × 138 mm	Φ16 × 138 mm	Φ13 × 165 mm	Φ13 × 165 mm	Φ16 × 160 mm

Shared Specifications

Parameter	Specification
Accuracy	±1.5%FS
T90 Response Time	≤ 60 s
Output	4-20mA / RS485 (optional)
Communication Protocol	Modbus RTU
Temperature Compensation	PT1000
Suitable Media	Pure water, deionized water, PG25/EG25
Body Material	316L stainless steel
Process Connection	3/4 NPT
Cable	5 m standard, extendable to 10 m

Dimensions & Ordering Guide

BS-EC350 Liquid-Cooled Conductivity Sensor dimensions drawing - 138mm length, 3/4 NPT threads

Dimensional drawing, models A/B (unit: mm)

The sensor features 3/4 NPT threads on both ends. Body dimensions vary by model: Φ16 × 138 mm for models A/B (shown), Φ13 × 165 mm for C/D, and Φ16 × 160 mm for model E.

Ordering guide:

BS-EC350A — 0–20 μS/cm
BS-EC350B — 0–200 μS/cm
BS-EC350C — 0–1000 μS/cm
BS-EC350D — 0–2000 μS/cm
BS-EC350E — 2–20000 μS/cm

How to Select the Right Range

Range selection follows the expected conductivity of your coolant:

Model A (0–20 μS/cm, K=0.01) — ultrapure water and deionized water loops; with the highest resolution.
Model B (0–200 μS/cm, K=0.01) — general coolant cleanliness monitoring with margin for glycol-blended coolants.
Models C/D (0–1000 / 0–2000 μS/cm, K=0.1) — glycol mixtures and industrial cooling media at moderate concentration.
Model E (2–20000 μS/cm, K=1) — high-conductivity media and process fluids.

Selection tip: For data center liquid cooling loops built to the <10 μS/cm acceptance criterion, choose BS-EC350A so that both the limit value and the 2 μS/cm fluctuation band resolve clearly within the measuring range.

Typical Applications

Data center liquid cooling — cold plate and immersion cooling loops, CDU primary/secondary side coolant monitoring, flushing acceptance verification
Energy storage systems — liquid-cooled battery pack coolant purity monitoring
High-power electronics — cooling water quality for power electronics and industrial drives

The BS-EC350 works alongside the BS-PHS276 Liquid-Cooled pH Sensor, turbidity sensors and theBT8500 liquid particle counter to form a complete coolant cleanliness monitoring package, all connectable to multi-parameter controllers.

Frequently Asked Questions

What is the BS-EC350 Liquid-Cooled Conductivity Sensor used for?

The BS-EC350 series is a conductivity sensor dedicated to liquid cooling systems. It continuously monitors the conductivity of coolants in data center liquid cooling, energy storage and high-power electronic cooling applications, tracking ion concentration and coolant purity to provide early warning of contamination, corrosion risk and coolant degradation.

What measuring ranges are available for the BS-EC350?

Five versions are available: BS-EC350A (0-20 μS/cm), BS-EC350B (0-200 μS/cm), BS-EC350C (0-1000 μS/cm), BS-EC350D (0-2000 μS/cm) and BS-EC350E (2-20000 μS/cm), with cell constants K=0.01, K=0.1 and K=1 respectively. All share ±1.5%FS accuracy and PT1000 temperature compensation.

What media is the BS-EC350 compatible with?

The BS-EC350 is compatible with pure water, deionized water, and PG25/EG25 (propylene glycol / ethylene glycol) coolants commonly used in liquid cooling systems. Its 316L stainless steel body with anti-polarization technology ensures stable long-term measurement.

What output signals does the BS-EC350 provide?

The BS-EC350 offers optional 4-20mA analog or RS485 digital output with Modbus RTU protocol, powered by 18–27 VDC (models A/B), 9–27 VDC (models C/D) or 12–24 VDC (model E). A 5 m cable is standard, extendable to 10 m.

How do I select the right BS-EC350 range for data center liquid cooling?

Industry standards such as T/GDSS 021-2026 require coolant conductivity below 10 μS/cm (with fluctuation under 2 μS/cm) after flushing data center liquid cooling pipelines. The BS-EC350A (0-20 μS/cm, K=0.01) covers this range with the best resolution; BS-EC350B (0-200 μS/cm) suits general coolant monitoring, while models C/D/E handle higher-conductivity glycol mixtures and industrial cooling media.

Reliable Conductivity Monitoring for Liquid Cooling

Conductivity is the fastest-moving indicator of coolant contamination — and with five ranges down to 0-20 μS/cm, the BS-EC350 resolves even the tightest acceptance limits. Anti-polarization and signal isolation technology keep readings stable in electromagnetically noisy plant environments.

Contact the Bebur team for range selection advice, datasheets and project pricing.

Need a liquid cooling conductivity monitoring solution?

pH, conductivity, turbidity and particle counting — a complete coolant cleanliness package

+86-10-87653191 zy@bebur.net

BS-EC350 Liquid-Cooled Conductivity Sensor