
Siemens Building Technology QFM2101 Sensor
The Siemens Building Technology QFM2101 Sensor is a high-performance duct humidity sensor engineered for precise atmospheric monitoring in commercial HVACR systems. This unit provides a stable 4-20mA output signal, facilitating seamless integration with a variety of building automation systems (BAS) and programmable logic controllers. Designed specifically for measuring relative humidity without an integrated display, the QFM2101 utilizes a capacitive sensing element to deliver consistent ±5% accuracy across a 0-100% RH range. The adjustable insertion depth, ranging from 3.5 to 8 inches (90 to 154 mm), allows for optimized probe placement in diverse duct sizes, ensuring accurate air stream sampling for critical control applications. Built with a rugged IP54-rated housing and a standard terminal block connection, this sensor is a reliable choice for monitoring return air, supply air, or outdoor air intake.
Core Technical Features:- Duct relative humidity sensor with active 2-wire 4-20mA current loop output.
- Robust 0-100% RH measurement range suitable for humidification and dehumidification control.
- Versatile adjustable probe length (3.5 to 8 inches) with an included mounting flange.
- Terminal block electrical connection for simplified field wiring using 18-20 AWG cable.
- Wide operating voltage range of DC 13.5 to 35 V, compatible with standard industrial power supplies.
- Polycarbonate housing with IP54 Protection Class for durability in mechanical room environments.
Does the QFM2101 require a dedicated power source?
This 4-20mA HVAC sensor operates on a 2-wire current loop, typically powered by the DC 13.5-35V source from the controller or an external power supply.
Is the sensing tip on the QFM2101 field-replaceable?
Unlike the 2% high-accuracy models in the QFM series, the 5% accuracy Siemens QFM2101 features a fixed sensing tip integrated into the probe assembly.
Can this sensor be used for temperature monitoring?
No, the QFM2101 is a humidity-only model. For dual humidity and temperature sensing, consider the Siemens QFM2160 or QFM2171 models which offer combined outputs.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Siemens Building Technology QFM2101 Sensor
The Siemens Building Technology QFM2101 Sensor is a high-performance duct humidity sensor engineered for precise atmospheric monitoring in commercial HVACR systems. This unit provides a stable 4-20mA output signal, facilitating seamless integration with a variety of building automation systems (BAS) and programmable logic controllers. Designed specifically for measuring relative humidity without an integrated display, the QFM2101 utilizes a capacitive sensing element to deliver consistent ±5% accuracy across a 0-100% RH range. The adjustable insertion depth, ranging from 3.5 to 8 inches (90 to 154 mm), allows for optimized probe placement in diverse duct sizes, ensuring accurate air stream sampling for critical control applications. Built with a rugged IP54-rated housing and a standard terminal block connection, this sensor is a reliable choice for monitoring return air, supply air, or outdoor air intake.
Core Technical Features:- Duct relative humidity sensor with active 2-wire 4-20mA current loop output.
- Robust 0-100% RH measurement range suitable for humidification and dehumidification control.
- Versatile adjustable probe length (3.5 to 8 inches) with an included mounting flange.
- Terminal block electrical connection for simplified field wiring using 18-20 AWG cable.
- Wide operating voltage range of DC 13.5 to 35 V, compatible with standard industrial power supplies.
- Polycarbonate housing with IP54 Protection Class for durability in mechanical room environments.
Does the QFM2101 require a dedicated power source?
This 4-20mA HVAC sensor operates on a 2-wire current loop, typically powered by the DC 13.5-35V source from the controller or an external power supply.
Is the sensing tip on the QFM2101 field-replaceable?
Unlike the 2% high-accuracy models in the QFM series, the 5% accuracy Siemens QFM2101 features a fixed sensing tip integrated into the probe assembly.
Can this sensor be used for temperature monitoring?
No, the QFM2101 is a humidity-only model. For dual humidity and temperature sensing, consider the Siemens QFM2160 or QFM2171 models which offer combined outputs.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Siemens Building Technology QFM2101 Sensor is a high-performance duct humidity sensor engineered for precise atmospheric monitoring in commercial HVACR systems. This unit provides a stable 4-20mA output signal, facilitating seamless integration with a variety of building automation systems (BAS) and programmable logic controllers. Designed specifically for measuring relative humidity without an integrated display, the QFM2101 utilizes a capacitive sensing element to deliver consistent ±5% accuracy across a 0-100% RH range. The adjustable insertion depth, ranging from 3.5 to 8 inches (90 to 154 mm), allows for optimized probe placement in diverse duct sizes, ensuring accurate air stream sampling for critical control applications. Built with a rugged IP54-rated housing and a standard terminal block connection, this sensor is a reliable choice for monitoring return air, supply air, or outdoor air intake.
Core Technical Features:- Duct relative humidity sensor with active 2-wire 4-20mA current loop output.
- Robust 0-100% RH measurement range suitable for humidification and dehumidification control.
- Versatile adjustable probe length (3.5 to 8 inches) with an included mounting flange.
- Terminal block electrical connection for simplified field wiring using 18-20 AWG cable.
- Wide operating voltage range of DC 13.5 to 35 V, compatible with standard industrial power supplies.
- Polycarbonate housing with IP54 Protection Class for durability in mechanical room environments.
Does the QFM2101 require a dedicated power source?
This 4-20mA HVAC sensor operates on a 2-wire current loop, typically powered by the DC 13.5-35V source from the controller or an external power supply.
Is the sensing tip on the QFM2101 field-replaceable?
Unlike the 2% high-accuracy models in the QFM series, the 5% accuracy Siemens QFM2101 features a fixed sensing tip integrated into the probe assembly.
Can this sensor be used for temperature monitoring?
No, the QFM2101 is a humidity-only model. For dual humidity and temperature sensing, consider the Siemens QFM2160 or QFM2171 models which offer combined outputs.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.












