cGas Detector for Indoor Public Spaces

For monitoring: Carbon dioxide, Carbon monoxide, Formaldehyde, TVOCs, Particulates, RH & Temperature, Refrigerants

One or two channel gas detector with an aesthetically pleasing design to reduce noticeability when used in publicly 
occupied spaces such as hotels and schools

Applications

Hotels, Office Buildings, Hospitals, Apartment Buildings, Retirement Homes, Theatres / Auditoriums, Schools / 
Universities / Dormitories and many more...

Key Features

• One 4-20 mA analog output or user in the field configurable BACnet® MS/TP RS-485 or Modbus® RTU RS-485
  digital output signal to a BAS
• Easy Plug & Play Smart Sensor replacement at end of life
• Pre-calibrated replacement sensors
• Bright LCD display
• Models available with user selectable 1PM, 2.5PM or 10PM particulate sensor
• Optional 2A SPDT dry contact relay (Option -RLY)
• Optional RH & Temperature sensor (Option -RHT)
• Low profile to reduce noticeability in public spaces
• USB port for configuration changes and firmware upgrades
• RoHS compliant circuit boards

This cGas Detector is designed for use in publicly occupied spaces where integrated demand controlled ventilation 
(DCV) is used for air quality and energy savings; for continuous monitoring of refrigerants where high-efficiency, 
high volume refrigerant cooling and heating systems (VRF) are used to keep the indoor environment comfortable; 
and for other continuous monitoring of hazardous gases in publicly frequented areas. The low profile, aesthetically 
pleasing enclosure is designed to reduce the noticeability of the device by the public eye. It is secured by a 
mounting plate that can be mounted proud of the wall or flush with the wall using a junction box.

Both the analog and digital models are powered by 24 VDC or ground referenced AC, come with an LCD display, 
temperature compensation and thermalresetting fuse. Sensor replacement is easy with true Plug & Play smart 
sensors that arrive pre-calibrated. The firmware and configuration can be upgraded 
in the field using the USB connection.

The digital models are user configurable in the field for BACnet® MS-TP RS-485 or Modbus® RTU RS-485 output 
for communicating with a controller, Building Automation System or other control panel.

Both the analog and digital models may be configured with an internal gas sensor or a remote refrigerant sensor 
(dongle). The internal sensor model is ideal for mounting flush with the wall. The remote refrigerant sensor model 
has a 9m / 29.5ft dongle cable that is ideal for use in packaged terminal air conditioner (PTAC) applications.

Target Gas

Gas Sensors				                Carbon dioxide (CO2), Carbon monoxide (CO), Formadehyde (CH2O), 
                                                        TVOCs, Refrigerants

Target Other

Sensors					        Particulates (user selectable 1PM, 2.5PM or 10PM) 
					                RH & Temperature

Mechanical

Enclosure					        White ABS / Polycarbonate, low profile with mounting plate

Weight					        400 g / 14 oz

Size					                127.7 x 119 x 40 mm 5.0 x 4.7 x 1.6 in

Dongle Cable Length			        9 m / 29.5 ft (available with the CGAS-AP-RD and CGAS-DP-RD models)

User Interface

Display					        2-line by 16 character graphic LCD, Operating Temp: 0°C to 40°C 
                                                        / 32°F to 104°F

Push Buttons				        Initiate calibration and menu options with internal UP, DOWN and 
                                                        ENTER push buttons

USB Port					        Internal port for USB memory stick for field configuration updates 
                                                        / firmware upgrades

Audible Alarm				        none

Input/Output

Analog Output (CGAS-AP models)		One 4 - 20 mA analog signal used for gas reading

Digital Output (CGAS-DP models)		User configurable in the field, BACnet® MS/TP (version 1 rev 14) RS-485 
                                                        or Modbus® RTU (version 1.1b3) RS-485 (user configurable in the field)

RH & Temperature (Option -RHT)*		User selectable units DegC or DegF

Relay (Option -RLY)**			        One SPDT dry contact, rated 30 volts, 2 amps max

Electrical

Power Requirement				16-30 VDC, 3 W, Class 2 
					                12-27 VAC, 50-60 Hz, 3 VA, Class 2

Wiring (analog)				        VDC (or ground referenced AC): 3-conductor 18 AWG (or larger) shielded, 
                                                        stranded within conduit
					                VAC 4-conductor shielded 18 AWG stranded within conduit

Wiring (digital)				        VDC or VAC (ground referenced) 4-conductor shielded 16 AWG stranded 
                                                        within conduit network wiring (daisy-chain)

Fuse(s)					        Automatic resetting thermal

Environmental

Operating Temperature			        0°C to 40°C (32°F to 104°F)

Operating Humidity				15 - 90% RH non-condensing

Certifications

Conforms to				                CSA-C22.2 No. 205-12, UL508 (Edition 18):2018 
                                                        EMC Directive 2014/30/EU, EN 50270:2015, Type 1, EN61010 
                                                        FCC. This device complies with Part 15 of the FCC Rules. 
                                                        Listed by BTL