006920261 Schneider STP300-100 0/160 Loop Thermo Transmitter 4-20mA 100mm Stem Two Wire Steam Duty

Measurement Precision: Every hydronic control loop inherits the accuracy of the probe that feeds it, which is why this unit is treated as a measurement instrument rather than an accessory. Catalogued by Schneider Electric inside the STP300 (4-20 mA transmitter) range.

Design Features: Features a stainless-steel stem that is lowered into the water stream through a separate closed pocket, allowing the sensing element to be swapped during maintenance without draining the circuit. The moulded, sealed transition separates wet metal from the cable, and the factory-fitted gland protects against condensation, dust, and wash-down spray.

Operation & Quality: As a passive device, it draws no meaningful current, requires no firmware updates, and has no battery replacement schedule. Each unit is checked against a traceable temperature reference before packing, with documentation suitable for commissioning records, handover dossiers, and energy-audit evidence.

Temperature Range Selection: Specify the 0 to 160°C span for circuits operating above the boiling point of unpressurised systems or when steam condensate is involved.

This transmitter is ideal for pressurised hot-water systems, medium-temperature heating circuits, and steam condensate return lines that routinely exceed standard transmitter limits. The wider temperature span ensures measurements remain within the calibrated band across the full operating envelope, allowing high-limit alarms, safety interlocks, and control loops to function with accurate data.

The stainless steel stem withstands higher temperatures, while the consistent two-wire loop architecture maintains wiring discipline throughout the plant, simplifying both installation and future maintenance troubleshooting.