AQ-Alert+ Air Quality Monitor - AQM Series

  • AQ-Alert+ Air Quality Monitor
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• Supply voltage: 24Vdc ± 20%
• Current consumption: 250mA max
• Up to 3 analogue – voltage and/or current
• RS232 or RS485 (Modbus RTU)
• Up to 3 relays
• LEDs
• Buzzer

  • Model Number: AQM Series
  • Data Sheet: Date Sheet File
Quantity:
- +

Product Specification

AQ-Alert+
Air Quality Monitor

The AQ-Alert+ is designed to monitor and control indoor air quality in the home, workplace and public areas, resulting in benefits such as improved comfort and health.

While most customers chose a monitor from our range of standard products, the configuration of the AQ-Alert+ may be defined by the user, making it ideally suited for use in a wide range of applications with varying requirements.

The AQ-Alert+ can be fitted with up to five different sensors and a variety of audio, visual, analogue, communications and relay outputs.

With the appropriate configuration, the AQ-Alert+ can operate in the following modes:

Stand Alone
The AQ-Alert+ monitors the air quality and alerts the occupant when a change in room conditions occurs.

Direct Control
The AQ-Alert+ monitors the air quality and directly controls ventilation, heating or air conditioning in order to maintain a preset range of room conditions. This can be via relays or analogue outputs.

Integration into a Building Management System 
The AQ-Alert+ sends air quality information to another system that controls ventilation, heating or air-conditioning. Multiple units can be individually configured and used throughout an entire system.

Sensor Options
• Carbon dioxide
• Oxygen
• Temperature
• Relative humidity
• Atmospheric pressure

Applications
• Schools
• Offices
• Homes
• Public buildings

Output Options
• Up to 3 analogue – voltage and/or current
• RS232 or RS485 (Modbus RTU)
• Up to 3 relays
• LEDs
• Buzzer

Certified Standards
• EN50270:2006,
• RoHS compliant

Table 1 Maximum ratings

Parameter
Maximum ratings
Description
Supply voltage
24Vdc ± 20%
Optional mains adaptor available
Current consumption
250mA max
All possible sensor and output options fitted

Table 2 Sensor options and parameters
Sensor
Symbol
Range
Units
Description
Carbon dioxide
CO2
0 - 5000
0 - 10 000
ppm
Accuracy: ±70ppm, ±5% of reading (whichever is greater)
Resolution: 1ppm
Oxygen
O2
0 - 25
%
Accuracy: ±1% vol.O 2 (after calibration in fresh air)
Resolution: 0.01% vol.O2
Temperature
T
0 - 50
°C
Accuracy: ±2°C
Resolution: 0.1°C
Relative humidity
Rh
0 - 95 
%Rh
Non-condensing
Accuracy: ±3%
Resolution: 0.1%
Atmospheric pressure
P
750 - 1150 
mbar
Accuracy: ±5mbar
Resolution: 1mbar

Table 3 Output options and parameters
Output
Number
Options
Description
Analogue
(current or voltage)
3 4 - 20mA
0 - 5Vdc
0 - 10Vdc
1 - 5Vdc
For current output, maximum load = 500Ω.
For voltage output, minimum load = 10kΩ.
Output range is directly proportional to the
relevant sensor’s measuring range
Digital
communications
1 RS232
RS485
Modbus RTU protocol
For RS485, up to 32 devices on the same bus
Relay
3 37.5VA, 250Vac max
All three relays switch a common input
Individual configurable switch points
Standard hysteresis = 1% of the set switch point
Normally open (NO) operation, user defines the
sensor range/s when the relays are closed
LEDs
1 Traffic light warning
sequence
Red, amber and green LEDs
Configurable sensor activation thresholds
Standard hysteresis = 1% of the set threshold
Continuous and/or intermittent operation
Buzzer
1 70dB @ 4kHz
Configurable sensor alarm thresholds
Standard hysteresis = 1% of the set threshold
Continuous and/or intermittent operation

PART NUMBERING SYSTEM
Generate your specific part number using the system in Figure 1. Use only those letters and numbers that correspond to the sensor and output options that you need – omit those that you do not. Include ‘AQM-‘at the beginning of the part number. The configuration reference number defines how your customised AQ-Alert+ will behave and is allocated by SST.


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