ST-725 Ultra-Low Conductivity Sensor (0.02-200.0µS/cm)

Industrial-Grade Ultra-Low Conductivity Sensor.

An inline ultra-low conductivity sensor designed for pure & ultra-pure water applications that measures at a range of 0.02-200.0µS/cm!

CE Mark

 

$1,128.00

Description

The ST-725 is an industrial-grade, inline ultra-low conductivity sensor designed for pure & ultra-pure water applications. It can be used for ultra-low conductivity measurement of pure water, ultra-pure water and deionized water including:

  • Boiler Feedwater and Condensate
  • RO and EDI/EDR Process Water
  • Ion Exchange
  • Distillation
  • Semi-Conductor Cleaning
  • Degas Conductivity and Other Process Applications

So, these are ‘smart sensors’ with a built-in transmitter supporting digital & analog signal outputs, and are designed to simplify field installation, calibration and operation. The sensors offer simple 3/4” MNPT threaded installation and are constructed with a Hastelloy electrode tip & stainless-steel body. The ST-725 sensor can be wirelessly calibrated with uPyxis® app when used with the MA-CR Bluetooth® adapter. The sensors both offer (2) 4–20mA Analog outputs, one for conductivity and one for temperature, as well as RS-485 Modbus output for a broad array of installations that desire to connect the smart sensor directly to any receiving controller, PLC or DCS network. The ST-725 has a built in RTD for the automatic compensation of sample temperature.

Features

  • Easy Installation into 3/4″ FNPT Standard Pipe Tee
  • The Latest Short Pulse Type Detection Method Technology
  • Built-In Temperature Sensor with Automatic Compensation
  • Front-End Fully Digital Detection Technology
  • Accurate & Stable Measurement with Ultra-Low Drift
  • Built-In Transmitter without Pre-Amplifier or Meter Head
  • (2) 4-20mA Isolated Analog & RS-485 Modbus Digital Outputs
  • Stainless Steel Housing Suitable for Harsh Environments
  • Pollution-Resistant & Anti-Interference Design
  • Specially Designed Electrode Greatly Improves the Long-Term Stability of the Sensor
  • Minimal Maintenance Required
  • Ultra-Low Detection 0.02µS/cm (50MΩ Resistivity)

High Performance Sensor for Data Center Cooling 

The ST- 725 is ideal for data center applications, enhanced coolant, and water quality monitoring. Able to handle critical systems like condenser and technology cooling. Designed for easy integration, the 24V DC-powered sensors feature low power demand (<1.5W), with built-in transmitters.  Furthermore, it is equipped with easy and direct communication with DCS or PLC systems and durable 316L stainless steel construction. Enabling operation under high pressures up to 290 psi. Finally, these features streamline installation, maintenance, and ensure reliable performance in demanding data center environments.

Industry

Cooling & Process Water, Data Center Cooling

Specifications

Item ST-725
Part Number 53108
Conductivity Range 0.02-200.0 µS/cm
Conductivity Precision ±0.1 µS/cm or 1% of the Value
4-20mA Range for Temperature 32-212 °F (0-100 °C)
Temperature Precision ±1% of the Value
Cell Constant (K) 0.3
Sample Pressure Up to 100psi (0.7MPa)
Power Supply 22-26VDC, Power Consumption 2W
Dimension 8.46in (215mm) L, 1.32in (33.6mm) D
Installation 3/4″ NPT
Body Material 304 Stainless Steel
Weight 530g (1.16lbs)
Operational Pressure 100psi (6.9Bar)
Operational Temperature 40-104 °F (4-50 °C)
Storage Temperature 20-140 °F (-7-60 °C)
Outputs 8-Pin – Isolated 4-20mA Analog & Isolated RS-485 Digital Outputs
Wet Material Hastelloy
Rating IP67, Fully Dustproof & Waterproof
Regulation CE, RoHS Marked
Cable Length 5ft (1.5m) – Extension Cables Available

Support Documents

ST-724 + ST-725 + ST-728 Ultra-Low Conductivity Sensors Data Sheet

ST-724-ST-725-ST-728 User Manual V1.08

Fluid Dynamics AI Critical Cooling Data Sheet

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