7731 AZ
Hard Wired CO2 Monitor
Features
ISO 9001 Facility: Manufactured in an ISO 9001 certified environment.
CE IEC/EN/BS EN 61010-1: Designed and tested to meet European Electric Equipment Regulations
LVD and the Scottish Technical Handbook (Domestic Environment 3.14.2): Designed to meet UK New Building standard
RoHS & REACH Compliant: We provide a Manufacturer’s Self Declaration, ensuring the product meets environmental safety standards for hazardous substances.
AZ 7731 Hard Wired CO2/RH/T Monitor with Dry Contact Relay features:
* Designed to meet LVD and Scottish Technical Handbook Domestic Environment 3.14.2
* Big color display w/CO2 , humidity and temp. value and equipped with dry contact for external connection
* Same size as a standard plate switch and fits within a 35mm deep flush back box. Two-part easy assembly
* Touch keypad to review the logged 8 hour average, 24 hour average and 24 hour peak value
* NDIR (non-dispersive infrared) CO2 technology
* Programable traffic light to indicate status of IAQ
* 3 level display brightness to adjust per need
* Buzzer function could be activated while required. Mute function is available while buzzer function is on
* CO2 manual calibration feature is included
* Dry contact normal open, loading: 5A@120VAC; 5A@250VAC5A; 5A@28VAC
* 100~240 VAC input, USB Type C for power
Application
Application of AZ 7731 Hard Wired CO2/RH/T Monitor with Dry Contact Relay:
The AZ 7731 Hard Wired CO2/RH/T Monitor complies with safety and environmental standards. The design of the AZ 7731 meets the Low Voltage Directive (LVD) and the Scottish Technical Handbook, indicating that it is safe for use in homes and adheres to specific environmental regulations.
The AZ 7731 Hard Wired CO2/RH/T Monitor is compatible with standard plate switches, and it includes dry contacts for external connections, suggesting that it can be easily integrated into existing automated HVAC systems.
The AZ 7731 Hard Wired CO2/RH/T Monitor is particularly useful because it not only monitors indoor air quality (IAQ) but also provides actionable insights with its advanced features, such as NDIR CO2 technology and programmable alerts.
The AZ 7731 Hard Wired CO2/RH/T Monitorcould be essential in offices and corporate buildings, healthcare facilities, educational institutions, the hospitality industry, and retail spaces. AZ 7731 Hard Wired CO2/RH/T Meter could also be applied in real estate, property management, construction, renovation, and manufacturing facilities to protect individuals under occupational health regulations.
The AZ 7731 Hard Wired CO2/RH/T Monitor with Dry Contact Relay was being designed and manufactured by AZ Instrument, a well experienced manufacturer of CO2 monitor.
Specification
Specification of AZ 7731 Hard Wired CO2/RH/T Monitor with Dry Contact Relay:
| Model | 7731 |
| CO2 Range | 200~9999 ppm |
| CO2 Resolution | 1 ppm |
| CO2 Accuracy | ±40 ppm ±3% of reading 400~2000 ppm, Other range is 10% of reading |
| CO2 Response Time | ＜5 mins (90% step change) |
| CO2 Warm-up Time | 10 Seconds |
| Air Temperature Range | 0~50℃, 32~122℉ |
| Air Temperature Resolution | 1℃, 1℉ |
| Air Temperature Accuracy | ±1℃, ±1℉ |
| Air Temperature Response Time | ＜2 mins (90% step change) |
| Humidity Range | 5~95% RH |
| Humidity Resolution | 1% RH |
| Humidity Accuracy | ±5%RH (at 25℃, 10~90%RH); others ±7%RH |
| Humidity Response Time | ＜20 mins (90% step change) |
| Operating Temperature | 0~50℃ |
| Operating RH% | 0~95% RH (avoid condensation) |
| Storage Temperature | -20~50℃ |
| Storage RH% | 0~95% RH (avoid condensation) |
| Power Supply | 100~240VAC, 50~60Hz, 1.5VA or 5VDC |
| Power consumption | <2W |
| Dry contact | Normal open, loading: 5A@120VAC; 5A@250VAC; 5A@28VDC |
| Buzzer | ~ 70dB at 10cm distance |
| Meter Size | 86(L) * 86(W) * 51(H) mm |
| LCD Size | 77(H) * 46(W) mm |
| IP | IP30 |
| Housing Material | ABS |
| Mounting Height | 1.4~1.8 M |
| Weight | 150 g |
| Standard Package | Meter, Manual, Paper box |
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FAQ
【FAQ of AZ 7731 Wall-Mount CO2, Temp & RH Monitor with Relay】
Q1: How does the dry contact relay work on the AZ 7731?
A: The AZ 7731 acts as a smart switch for your HVAC system. When CO2 levels exceed your preset limit, the internal dry contact relay closes to automatically trigger an external exhaust fan or ventilator. Once CO2 levels return to a safe range, the relay opens to turn the device off, ensuring energy efficiency and constant fresh air.
Q2: Does this monitor require batteries or a power adapter?
A: The AZ 7731 is designed for professional installation and supports a 100~240 VAC hard-wired input. It also includes a USB Type-C port for alternative power options or testing.
Q3: How do I ensure the CO2 readings stay accurate?
A: The device provides two calibration options to maintain the precision of its NDIR sensor:
* ABC (Automatic): It self-corrects sensor drift by tracking the lowest CO2 levels over 7 days. It is ideal for offices or schools that get fresh air at night.
* Manual Calibration: For spaces without regular fresh air (like 24-hour factories or greenhouses), you can manually reset the 400ppm baseline in fresh outdoor air using the touch panel.
