The GDT Series of gas monitoring sensors monitor levels of carbon monoxide (CO) and/or nitrogen dioxide (NO2) to provide an early warning of elevated concentrations.
The GDT is available as a standalone CO or NO2, as well as a CO/NO2 dual sensor device. The dual sensor device is available in 2 configurations: CO/NO2 housed in one enclosure or as CO with remote NO2 sensor for mounting at a higher location.
The GDT gas sensors are encapsulated in field replaceable sensor pods that are located on the bottom of the enclosure. The pod design provides a greater area of gas sampling then that of devices that utilize a single vent hole. Replacement pods come pre-calibrated and ready for installation.
The GDT is available with either Analog, BACnet or Modbus outputs for communication with a building automation system. Standard features include LCD display for configuration and local display as well as status LED’s. Optional features include: 1 or 2 adjustable control/alarm relays, adjustable audible (buzzer) & visual (strobe) alarms as well as various temperature sensors.
The GDT is housed in an IP65 polycarbonate enclosure with a hinged and gasketed cover that provides ease of installation and access for set up and configuration.
Calibration Kit
The GDT-CALKIT-CNC is a kit to correctly calibrate the Greystone Model GDT CO/NO2 detectors. The GDT-CALKIT-CNC includes:
- Tubing
- Regulator
- Calibration Cap
- Sponge (for CO only)
- Carrying Case (holds accessories and 2 gas cannisters)
Note: Calibration Gas is not included. To be purchased locally.
Calibration Gas Requirements (103 liter tanks):
250ppm CO in air
10ppm NO2 in air
Pre-Calibrated Sensor Replacement
The GDT sensor features a gas sensor pod that is pre-calibrated. This means that the pod can simply be replaced with a new calibrated pod if desired without having to remove the enclosure and the main processor board. Simply unplug the pod cable connection from the main board in the enclosure, remove the pod by unscrewing from the enclosure. Install the new Pod and reconnect the pod cable. This sensor swap can be completed in seconds. There is no need to make any adjustments or apply gas to the transmitter using the sensor swap method.
