Siemens Building Technology QFA3212.EWSN Sensor
The Siemens QFA3212.EWSN is a high-precision room humidity and temperature sensor designed for demanding commercial HVAC and building automation systems. Built for seamless integration with Siemens Terminal Equipment Controllers (TECs) and APOGEE systems, this unit provides critical environmental feedback to ensure optimal indoor air quality. It serves as a direct professional upgrade and replacement for the QFA3212.EWNN, maintaining the same physical footprint while featuring the prominent Siemens brand logo. This sensor utilizes a high-grade 1k Ohm Platinum RTD (385 alpha) sensing element for specialized temperature monitoring and offers a selectable 0-10Vdc or 4-20mA output signal for relative humidity measurements across a full 0-100% RH range.
Engineered for field reliability, the QFA3212.EWSN features a blank front housing with no display, preventing unauthorized tampering in public spaces. The unit is optimized for fast response times through strategically designed ventilation slots, ensuring accurate tracking of indoor humidity levels. Contractors will find the terminal block connection straightforward for new installs or retrofits. Operating on a versatile 24 VAC/VDC power supply, it delivers 2% humidity accuracy, making it a staple for clean rooms, hospitals, and office environments that require stable HVAC sensor performance.
Key Benefits
- Selectable Output Signals: Easily configure between 0-10Vdc and 4-20mA humidity signals to match existing controller inputs.
- High-Accuracy Temperature Sensing: Features a Pt1000 (1k Ohm) RTD element with a 385 alpha coefficient for stable, long-term temperature calibration.
- Tamper-Resistant Design: The no-display, blank faceplate is ideal for schools and public buildings where occupant interaction must be limited.
- Universal Compatibility: Serves as the direct manufacturer replacement for the QFA3212.EWNN, ensuring 1:1 fitment during maintenance.
- Versatile Power Options: Compatible with standard 24V AC or DC power circuits found in most building automation control cabinets.
Common Questions
Is the QFA3212.EWSN a direct swap for the older EWNN model?
Yes, the QFA3212.EWSN is the designated replacement for the QFA3212.EWNN. The primary difference is the presence of the Siemens logo on the front cover; the internal wiring and technical specifications remain identical.
How do I change the signal from 0-10V to 4-20mA?
The output signal is field-selectable via internal jumpers. Ensure power is disconnected before adjusting settings to avoid damaging the RH sensor circuitry.
What mounting options are available for this sensor?
This unit is designed for wall-mount applications and fits standard 2" x 4" electrical boxes or can be mounted directly to a flat surface in the monitored space.
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.
Original: $194.83
-65%$194.83
$68.19Siemens Building Technology QFA3212.EWSN Sensor
The Siemens QFA3212.EWSN is a high-precision room humidity and temperature sensor designed for demanding commercial HVAC and building automation systems. Built for seamless integration with Siemens Terminal Equipment Controllers (TECs) and APOGEE systems, this unit provides critical environmental feedback to ensure optimal indoor air quality. It serves as a direct professional upgrade and replacement for the QFA3212.EWNN, maintaining the same physical footprint while featuring the prominent Siemens brand logo. This sensor utilizes a high-grade 1k Ohm Platinum RTD (385 alpha) sensing element for specialized temperature monitoring and offers a selectable 0-10Vdc or 4-20mA output signal for relative humidity measurements across a full 0-100% RH range.
Engineered for field reliability, the QFA3212.EWSN features a blank front housing with no display, preventing unauthorized tampering in public spaces. The unit is optimized for fast response times through strategically designed ventilation slots, ensuring accurate tracking of indoor humidity levels. Contractors will find the terminal block connection straightforward for new installs or retrofits. Operating on a versatile 24 VAC/VDC power supply, it delivers 2% humidity accuracy, making it a staple for clean rooms, hospitals, and office environments that require stable HVAC sensor performance.
Key Benefits
- Selectable Output Signals: Easily configure between 0-10Vdc and 4-20mA humidity signals to match existing controller inputs.
- High-Accuracy Temperature Sensing: Features a Pt1000 (1k Ohm) RTD element with a 385 alpha coefficient for stable, long-term temperature calibration.
- Tamper-Resistant Design: The no-display, blank faceplate is ideal for schools and public buildings where occupant interaction must be limited.
- Universal Compatibility: Serves as the direct manufacturer replacement for the QFA3212.EWNN, ensuring 1:1 fitment during maintenance.
- Versatile Power Options: Compatible with standard 24V AC or DC power circuits found in most building automation control cabinets.
Common Questions
Is the QFA3212.EWSN a direct swap for the older EWNN model?
Yes, the QFA3212.EWSN is the designated replacement for the QFA3212.EWNN. The primary difference is the presence of the Siemens logo on the front cover; the internal wiring and technical specifications remain identical.
How do I change the signal from 0-10V to 4-20mA?
The output signal is field-selectable via internal jumpers. Ensure power is disconnected before adjusting settings to avoid damaging the RH sensor circuitry.
What mounting options are available for this sensor?
This unit is designed for wall-mount applications and fits standard 2" x 4" electrical boxes or can be mounted directly to a flat surface in the monitored space.
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Siemens QFA3212.EWSN is a high-precision room humidity and temperature sensor designed for demanding commercial HVAC and building automation systems. Built for seamless integration with Siemens Terminal Equipment Controllers (TECs) and APOGEE systems, this unit provides critical environmental feedback to ensure optimal indoor air quality. It serves as a direct professional upgrade and replacement for the QFA3212.EWNN, maintaining the same physical footprint while featuring the prominent Siemens brand logo. This sensor utilizes a high-grade 1k Ohm Platinum RTD (385 alpha) sensing element for specialized temperature monitoring and offers a selectable 0-10Vdc or 4-20mA output signal for relative humidity measurements across a full 0-100% RH range.
Engineered for field reliability, the QFA3212.EWSN features a blank front housing with no display, preventing unauthorized tampering in public spaces. The unit is optimized for fast response times through strategically designed ventilation slots, ensuring accurate tracking of indoor humidity levels. Contractors will find the terminal block connection straightforward for new installs or retrofits. Operating on a versatile 24 VAC/VDC power supply, it delivers 2% humidity accuracy, making it a staple for clean rooms, hospitals, and office environments that require stable HVAC sensor performance.
Key Benefits
- Selectable Output Signals: Easily configure between 0-10Vdc and 4-20mA humidity signals to match existing controller inputs.
- High-Accuracy Temperature Sensing: Features a Pt1000 (1k Ohm) RTD element with a 385 alpha coefficient for stable, long-term temperature calibration.
- Tamper-Resistant Design: The no-display, blank faceplate is ideal for schools and public buildings where occupant interaction must be limited.
- Universal Compatibility: Serves as the direct manufacturer replacement for the QFA3212.EWNN, ensuring 1:1 fitment during maintenance.
- Versatile Power Options: Compatible with standard 24V AC or DC power circuits found in most building automation control cabinets.
Common Questions
Is the QFA3212.EWSN a direct swap for the older EWNN model?
Yes, the QFA3212.EWSN is the designated replacement for the QFA3212.EWNN. The primary difference is the presence of the Siemens logo on the front cover; the internal wiring and technical specifications remain identical.
How do I change the signal from 0-10V to 4-20mA?
The output signal is field-selectable via internal jumpers. Ensure power is disconnected before adjusting settings to avoid damaging the RH sensor circuitry.
What mounting options are available for this sensor?
This unit is designed for wall-mount applications and fits standard 2" x 4" electrical boxes or can be mounted directly to a flat surface in the monitored space.
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.
