5123174010 Schneider STP500-150 Hydronic Immersion Sensor for Chilled and Heating Water Circuits White

The STP500-150 hydronic immersion temperature sensor features a 150 mm stem designed for water pipework wrapped in insulation or buried in plant room mains. The extended probe length ensures accurate fluid temperature measurement rather than measuring the insulation cladding, eliminating systematic bias in control decisions.

This sensor utilizes a 10 kOhm negative temperature coefficient thermistor with curve type compatibility for Andover Continuum controllers. The device connects directly to controller universal inputs without requiring signal conditioning, configuration, calibration, or external power. Installation occurs through a separate closed pocket, enabling sensor withdrawal and replacement without system drainage.

As a passive sensor without diagnostics, faults present as implausible readings at the controller. Initial troubleshooting involves measuring resistance at controller terminals and comparing against expected temperature curves.

• Chilled and heating water mains in plant rooms for control loops, energy reporting, and performance monitoring
• District heating substations on secondary sides for consumption allocation and billing accuracy
• Thermal stores and buffer vessels with 150 mm insertion reaching past insulation into water body
• Boiler and chiller sequencing based on accurate supply and return temperature values
• Commissioning reference for verifying permanent installation piping and wiring