COMET H5324 – CO₂ Controller with 2 Relays

COMET H5324 CO₂ Controller with 2 Relays RS232 

The COMET H5324 is a reliable CO₂ concentration controller with direct control functionality. It accurately measures carbon dioxide levels from 0 to 5000 ppm and automatically activates two powerful relays when thresholds are exceeded – ideal for controlling ventilation, air conditioning, window openers, or alarm sirens. A 3-color LED indicator (green/yellow/red) and a loud acoustic signal immediately warn of poor air quality.

Perfect for rooms with variable occupancy: schools, kindergartens, offices, conference rooms, sports halls, restaurants, or production areas. The H5324 automatically ensures fresh air while saving up to 50% energy through demand-controlled ventilation.

The RS232 interface with Modbus RTU protocol (and Advantech ADAM compatibility) allows easy integration of the H5324 into building automation and monitoring systems. The maintenance-free NDIR CO₂ sensor with automatic calibration guarantees long-term precision without the need for recalibration.

With its robust housing, simple wall mounting, and a 3-year warranty, the H5324 is the smart solution for healthy indoor air and energy-efficient ventilation.

Why the COMET H5324 is the ideal CO₂ control solution:

• Precise NDIR CO₂ sensor 0–5000 ppm (±50 ppm + 3%)
• 2 potential-free relays (2 A / 50 V / 60 VA) – direct ventilation control
• 3-color LED indicator – instantly visible air quality
• Integrated acoustic alarm – switchable
• RS232 Modbus RTU – compatible with many systems
• Maintenance-free thanks to automatic calibration
• Rugged housing – operating temperature –30 to +60 °C
• Easy wall mounting
• 3-year warranty

Technical data:

• CO₂ measuring range: 0 to 5000 ppm
• CO₂ accuracy: ±(50 ppm + 3% of measured value) at 25 °C and 1013 hPa
• CO₂ resolution: 1 ppm
• Relay outputs: 2 × potential-free, max. 50 V / 2 A / 60 VA
• LED indicator: Green ≤1000 ppm | Yellow 1001–1200 ppm | Red ≥1201 ppm
• Acoustic alarm: built-in beeper, switchable
• Communication: RS232, Modbus RTU, Advantech ADAM
• Power supply: 9–30 V DC
• Operating temperature: –30 to +60 °C
• Protection rating: IP30
• Dimensions: 136 × 150 × 45 mm
• Weight: approx. 360 g
• Warranty: 3 years

Perfectly suited for:

• Schools, kindergartens, lecture halls
• Offices, open-plan offices, call centers
• Conference and meeting rooms
• Sports halls, fitness studios
• Restaurants, canteens, hospitality environments
• Production and storage halls
• Hospitals, waiting rooms
• Demand-controlled ventilation according to current guidelines

Installation & commissioning – quick and easy

Mount the unit on the wall using two screws, connect relays and power supply, and optionally connect RS232 – that’s it. Switching points, hysteresis, and alarm delay can be conveniently set using the free TSensor software or directly on the device.

Summary:

• CO₂ level transmitter with two relay outputs
• Green LED on: CO₂ concentration 0–1000 ppm
• Yellow LED on: CO₂ concentration 1001–1200 ppm
• Red LED on: CO₂ concentration 1201 ppm and above

Scope of delivery:

• H5324
• User manual
• Traceable calibration certificate
• Free TSensor software for transmitter configuration