COMET H5421 | RS485 CO2 Transmitter with Relay Outputs — Extended Range 0-10,000 ppm

COMET H5421 is a CO2 and level monitor with RS485 serial communication and relay outputs for Modbus-based building management and industrial control systems. Multi-drop network integration via RS485 combines with direct CO2 threshold-triggered relay switching for ventilation management, alarm activation, and process control automation in networked environments.

$ 2,357.50 Ex. GST

Available to back order. ETA will be 3 - 5 weeks.

Availability Info ?
Available to back order. ETA will be 3 - 5 weeks.

$2,357.50 Ex. GST

Description

CO2 level transmitter with two output relays. The device is supplied with CO2 probe with 1m cable. Cable lengths 2 or 4 meters available optionally.

Green LED shines - CO2 concentration 0 to 1000 ppm

Yellow LED shines - CO2 concentration 1001 to 1200 ppm

Red LED shines - CO2 concentration 1201 ppm and more

INCLUDED IN DELIVERY:


3 year warranty

Specifications

MEASURED VALUE
CO2

CO2 SENSOR
Measuring range 0 to 10 000 ppm
Accuracy ±(100ppm +5% from reading) at 25°C and 1013hPa
Resolution 1 ppm

RELAY OUTPUTS
Quantity 2
Maximal voltage 50 V
Maximal current 2 A
Maximal power 60 VA

GENERAL TECHNICAL DATA
Operating temperature -30 to +60 °C
Channels 1x external CO2 sensor
Acoustic alarm from built-in beeper – switchable
Output RS485
Communication protocol ModBus RTU and Advantech ADAM compatible protocol
Power 9-30 Vdc
Protection class IP65
Dimensions 136 x 150 x 45 mm
External probe cable length CO2 1 meter (optionally 2 or 4 meters)
Weight approx. 360 g
Warranty 3 years

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