Data Sheet for Product

A6V101099173_en--_b Building Technologies

2018-05-01

Room air quality sensors

QPA10x4

· Maintenance-free CO

sensing element based on optical infrared absorption

measurement (NDIR = non dispersive infrared)

· No recalibrations required

· Signal outputs DC 0...10 V or 4...20 mA adjustable

Use

In ventilation and air conditioning plants to enhance room comfort and optimize energy

consumption by providing demand-controlled ventilation. The sensor acquires CO

concentrations and temperature.

The sensors may not be deployed as safety devices, e.g. as gas or smoke warning

devices!

Type summary

Type Order number Designation

QPA1004 S55720-S453 Room sensor CO

QPA1064 S55720-S454 Room sensor CO

Important!

1961P01

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961P01 Room air quality sensors · · · QPA10x4 Maintenance-free CO2 sensing element based on optical infrared absorption measurement (NDIR = non dispersive infrared) No recalibrations required Signal outputs DC 0...10 V or 4...20 mA adjustable Use In ventilation and air conditioning plants to enhance room comfort and optimize energy consumption by providing demand-controlled ventilation. The sensor acquires CO 2 concentrations and temperature.
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Engineering notes Cable routing and cable selection The sensor must be powered by a transformer for safety extra low-voltage (SELV) with separate windings, suited for 100 % duty. On applications with EMC problems, use shielded cables. For secondary power lines and signal lines, use twisted-pair cables. Mounting notes Mounting location Inner wall of the room to be ventilated, not in niches, not behind curtains, not above or near heat sources, and not exposed to direct light from spot lights.
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Materials and colors Directives and Standards Environmental compatibility Weight Transport to Climatic conditions Temperature Humidity Mechanical conditions IEC 60721-3-2 Class 2K3 - 25...+ 70 °C < 95 % r. F.
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Dimensions 36 90 56 60 60 Drilling plan Dimensions in mm Issued by: Siemens Switzerland Ltd. Building Technologies Division International Headquarters Theilerstrasse 1a 6300 Zug Switzerland Tel. +41 58-724 24 24 www.siemens.