Brahma 18200309 ST06 red G1/8 CH13 temperature sensor

This article is an NTC temperature sensor from Brahma, listed under the catalogue category for temperature NTC sensors. Parts of this type are used to close the control loop in boiler and burner systems by reporting fluid temperatures to the control board. Typical measurement points include the flow pipe, return pipe, cylinder, and outdoor air. The control board uses the resistance value from the NTC sensor to modulate burner output, adjust the three-way valve, or trigger safeties. Without accurate temperature feedback, the system cannot maintain stable operation. Selection of such sensors depends on the resistance characteristic at a reference temperature (commonly 10 kΩ or 12 kΩ at 25 °C), the probe form (immersion, clamp-on, or sleeve), cable length and connector type, and the specific connection to the control board. When replacing a sensor, match the resistance curve and the physical mounting arrangement to the original. Common failures include a drifting resistance curve that causes incorrect modulation, broken cables, or poor thermal contact between a clamp-on probe and the pipe surface. A failing sensor may lead to unstable water temperature, frequent cycling, or lockout conditions. The sensor itself is a passive component; it does not require a power supply and is wired directly to the control board’s NTC input. No additional calibration is needed, but ensure the probe tip is fully inserted or securely clamped to the pipe for accurate readings.