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ATC Semitec FRP3 HVAC Immersion Sensor
Gas-boiler style sensor with 1/8″BSP gas thread and integral connector, which are commonly used as HVAC immersion temperature sensors.
Available in brass or nickel-plated with a time constant (Tc) of around 5s typically
Applications
- Gas boilers
- Heating and air conditioning systems
- Instant water heaters
- Compressors
Features
- Fast response design (Tc ≤ 5s)
- Accuracy ±1%, available ±0.2K (0-70°C)
- Operating range up to -40°C/ +125°C
- Interchangeability between NTCs
- Excellent long-term stability


Technical Specifications
NTC Thermistor Series | AT-2, ATC3, ET, GT, ATCS, SP |
Temperature Range | -40°C/+125°C depending on NTC |
Sensor Accuracy | R25±3% as standard, ±1% available |
Sensor Material | Nickel-plated brass, brass, stainless steel |
Lead Wires | Integral as a special option |
Connectors | Lumberg 2.5 MSF, Tyco Modu, etc |