FRP3 Immersion Temperature Sensors

The FRP3 sensor design is commonly found in many gas-fired hot-water boilers.  Through being manufactured in high-volumes, this sensor is relatively low-cost and so can be utilised across a range of temperature sensing applications.

The FRP3 sensor is generally supplied with an 1/8″BSPG thread and integral connector, though metric threads and flexible lead-wire options are also readily available.  This sensor can be supplied with various NTC thermistors or with Pt100/Pt1000 platinum elements.

These immersion sensors are available in brass, nickel-plated brass or stainless steel with a typical time constant (Tc) of around 5 seconds.

Applications

• Gas hot water boilers
• Heating and air conditioning systems
• Instantaneous hot water heaters
• Air compressors and diesel generators

Features

• Fast response design (Tc ≤ 5s)
• Accuracy ±1%, available ±0.2K (0-70°C)
• Operating range up to -40°C/ +125°C
• Interchangeable NTCs or PRTDs
• Connector or lead-wire options
• Various housing materials