Macurco CX-6 — low-voltage dual-gas detector, controller and transducer reading carbon monoxide and nitrogen dioxide in one unit.
Enclosed garages and loading docks produce both gases, and the two need different thresholds, so the CX-6 carries two independent electrochemical sensors with their own set-points. It runs stand-alone as an exhaust-fan controller or as a transducer.
- Displays 0 to 200 ppm CO and 0 to 20 ppm NO2 on a four-digit LED readout
- Fan relay 5 A SPDT at 240 Vac pilot duty, CO trip 15 to 100 ppm, NO2 0.5 to 5.0 ppm
- Alarm relay 0.5 A at 120 V, 60 VA, CO trip 50 to 200 ppm, NO2 1 to 20 ppm
- 4 to 20 mA loop, 4 mA in clean air; 85 dBA buzzer
- 3 W max from 12 to 24 Vac or 12 to 32 Vdc; 23 mA standby, 75 mA in alarm
- Two replaceable sensors, five-year expected life, expired signal at 4 years 11 months
- 0 to 125 °F; ETL certified to UL 2075, certified to ULC Std. 588C
It mounts on a 4 x 4 electrical box the contractor supplies and becomes its cover. Single-gas siblings look identical: CX-6-CO reads carbon monoxide only, CX-6-NO2 nitrogen dioxide only. CX-12 is the line-voltage version.
Specifications
| Gases |
Carbon monoxide (CO) and nitrogen dioxide (NO2) |
| Display range |
0 to 200 ppm CO; 0 to 20 ppm NO2 |
| Fan relay |
5 A SPDT at 240 Vac pilot duty; CO trip 15 to 100 ppm, NO2 trip 0.5 to 5.0 ppm |
| Alarm relay |
0.5 A at 120 V, 60 VA; CO trip 50 to 200 ppm, NO2 trip 1 to 20 ppm |
| Output |
4 to 20 mA loop, 4 mA in clean air; 85 dBA buzzer |
| Power |
12 to 24 Vac or 12 to 32 Vdc, 3 W max; 23 mA standby, 75 mA in alarm |
| Sensors |
Two replaceable, five-year expected life |
| Operating temperature |
0 to 125 °F |
| Certifications |
ETL certified to UL 2075; certified to ULC Std. 588C |
Compatibility
The Macurco CX-6 is the low-voltage dual-gas model. The line-voltage version is the CX-12; see the Macurco CX-12. Single-gas siblings look identical: the CX-6-CO reads carbon monoxide only and the CX-6-NO2 reads nitrogen dioxide only. The CX-6 mounts on a 4 x 4 electrical box that the contractor supplies.
FAQ
Which gases does the CX-6 detect?
Carbon monoxide (0 to 200 ppm) and nitrogen dioxide (0 to 20 ppm), with replaceable sensors and a 5-year expected sensor life.
What power does it need?
3 W maximum from 12 to 24 VAC or 12 to 32 VDC. At 24 VDC it draws 23 mA in standby, 50 mA with the fan relay on and 75 mA in alarm.
How much area does one detector cover?
Up to 7,500 sq. ft., depending on the application. It mounts on a 4 x 4 in. electrical box.
Can it connect to a BMS?
Yes. It has a 4-20 mA output, and the MRS-485 adapter adds digital Modbus communication. It also has a 5 A fan relay and a 0.5 A alarm relay.
