CS3742D Conductivity Sensor

Short Description:

conductivity sensor is an analytical device for measuring the electrical conductivity of a liquid, which directly reflects its total ion concentration and purity. It operates on the principle of applying an alternating voltage between two or four electrode rings (typically made of graphite or platinum) to prevent polarization. The sensor includes a built‑in temperature sensor for automatic temperature compensation (ATC), ensuring accurate readings across varying temperatures. Conductivity sensors are widely used in water treatment (e.g., reverse osmosis, boiler feedwater), industrial process control, aquaculture, hydroponics, and environmental monitoring. They can measure from ultra‑pure water (0.055 µS/cm) to high‑concentration brines (up to 2000 mS/cm). Output options include 4‑20 mA, RS‑485 (Modbus), or digital protocols, enabling seamless integration into SCADA or IoT platforms. The sensor is housed in a durable, waterproof (IP68) body with anti‑fouling materials. Regular calibration ensures long‑term stability. By delivering real‑time conductivity data, the sensor helps operators optimize chemical dosing, monitor product quality, protect equipment from corrosion or scaling, and ensure regulatory compliance. It is an essential, cost‑effective tool for continuous, unattended water quality monitoring in both industrial and environmental applications.

Model NO.: CS3742D
Power/Outlet: 9~36VDC/RS485 MODBUS RTU
Cell constant: K=0.1
Measure material: Graphite (2 Electrode)

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Introduction:

Measuring specific conductivity of aqueous solutions is becoming increasingly important for determining impurities in water.The measurement accuracy is greatly affected by temperature variation, polarization of the contact electrode surface, cable capacitance, etc.Twinno has designed a variety of sophisticated sensors and meters that can handle these measurements even in extreme conditions.

Suitable for low conductivity applications in the semiconductor, power, water and pharmaceutical industries, these sensors are compact and easy to use.The meter can be installed in several ways, one of which is through the compression gland, which is a simple and effective method of direct insertion into the process pipeline.

The sensor is made from a combination of FDA-approved fluid receiving materials.This makes them ideal for monitoring pure water systems for the preparation of injectable solutions and similar applications.In this application, the sanitary crimping method is used for installation.

Technical parameters:

Model NO.	CS3742D
Power/Outlet	9~36VDC/RS485 MODBUS RTU
Cell constant	K=0.1
Measure material	Graphite (2 Electrode)
Housing material	PP
Waterproof grade	IP68
Measurement range	1-1000us/cm
Accuracy	±1%F.S
Pressure resistance	≤0.6Mpa
Temperature compensation	NTC10K
Temperature range	0-130℃
Calibration	Sample calibration, standard liquid calibration
Connection methods	4 core cable
Cable length	Standard 10m cable, can be extended to 100m
Installation thread	NPT3/4’’
Application	General application, river, lake , drink water,etc.