Newly redesigned MSCT Series »
Chiller Systems

Chiller Systems Sensor Types and Locations

Sensors play a crucial role in chiller systems by providing valuable data for monitoring, control, and optimization. Here are some common sensor applications in chiller systems:

Chiller room

Pressure Transducers

Pressure transducers are a crucial component in chiller systems, enabling accurate pressure measurement and contributing to the overall efficiency and reliability of the system.

Differential Pressure Measurement

Several instruments can be used to measure the differential pressure across a chiller. The differential pressure measured corresponds to the flow rate; the higher the flow, the higher the DP. Differential pressure switches or transmitters are most common.  

Temp/RH sensor

Used to maintain occupant comfort humidity and temperature levels via precise relative humidity (RH) and temperature measurement.

Immersion Sensors

These are used to monitor the inlet and outlet temperatures of the chilled water and the refrigerant. This data helps in ensuring efficient cooling and detecting any temperature-related issues.

Strap-on/Pipe Mount sensors

These are used to monitor the inlet and outlet temperatures of the chilled water and the refrigerant when the pipe is too small for an Immersion sensor.

Leak Detection

Leak detection sensors are crucial for identifying refrigerant or water leaks, which can have environmental and safety implications.

Current Sensors

These sensors monitor the current drawn by the chiller's motors and compressors. Unusual current spikes might indicate issues with the equipment or the need for maintenance.

Flow Switch

Used as proof that water is flowing through the system

Power Meters

These sensors monitor various electrical parameters like voltage, current, and power factor, providing insights into the electrical performance of the chiller.

Products needed for Chiller Rooms

Item: 131603

Model: QIRF-R134AX-0

Refrigerant Sensor, R134a, 0-1000 PPM, LCD, 3 SPDT Relays, NEMA 4X

Item: 138105

Model: A/WPR2-100-20-LCD

Wet Differential Pressure, 0-10, 0-25, 0-50, 0-100 PSID (Default), 20' Cables, LCD, Outputs: 0-10 VDC (Default), 0-5 VDC, 4-20mA (Selectable)

Note: Order the model based upon line pressure, and not differential pressure.

room R2
Item: 130711

Model: A/RH2-CP-R2

Relative Humidity, RH Outputs: 0-5, 0-10 VDC & 4-20mA (Default), Room (R2), ± 2% Accuracy, 10K Ohm Thermistor (Type II)

Item: 148238

Model: KW350-P1-D-S-RC

Power Meter, Bi-Directional, 3 Circuit, ANSI 0.5 Class Accuracy, Serial Communication, BACnet MS/TP and Modbus RTU, Rogowski Coil Inputs and LCD Display