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BTS1 Screw-Threaded Temperature Sensors

A range of screw-threaded temperature sensors with a 1/8″BSP gas thread and integral connector.  A wide range of NTC  thermistors can be incorporated in this design helping you fine-tune it to your application.

Originally designed for use in gas boilers, they can be used anywhere you want to sense or control a fluid temperature in a pipe or vessel.  Also available with integral flying leads instead of connectors.



• Gas boilers
• Heating and air conditioning systems
• Instant water heaters
• Coffee machines


• Fast response design (Tc ≤ 5s)
• Accuracy ±3%, available ±0.2K (0-70°C)
• Operating range up to +150°C possible
• Excellent long-term stability.
• Available in brass or nickel-plated

ATC Semitec BTS1 Boiler Temperature Probe BTS1 Screw-In Temperature Probe Drawing

Technical Specifications

NTC Thermistor Series AT-2, ATC3, ET, ATCG, ATCS, SP
Temperature Range -50°C/+150°C depending on NTC
Sensor Accuracy R25±3% as standard, ±0.2K (0-70°C) available
Sensor Material Nickel-plated brass, brass, stainless steel
Lead Wires Integral as a special option
Connectors Lumberg 2.5 MSF, Tyco Modu, etc