Name: HQT-3000 Series Gas Alarm Controller
Brand: Huanqitong
SKU: HQT-3000
Availability: InStock

Overview

The gas alarm controller is the brain of a gas monitoring system. It receives signals from field fixed gas detectors, displays concentrations, evaluates alarm thresholds, triggers audible/visual alarms and drives interlocks. When any point exceeds its setpoint, the controller alarms immediately and activates relays to start fans or close shutdown valves.

Both 4-20mA and RS485 / Modbus inputs are supported; channel count scales with project size, and system data can be uploaded to a DCS, PLC or host platform.

Typical Specifications

Input Channels

1 / 4 / 8 / 16 / 32 / 64 channels, accepting 4-20mA and RS485.

Display

Large LCD showing per-channel concentration, status and alarm information.

Alarm Output

Two-level alarms (low / high) with multiple relay dry-contact outputs.

Data Upload

RS485 / Modbus RTU to DCS or PLC; optional 4G cloud upload.

Power Supply

AC 220 V with optional UPS backup.

Mounting

Wall-mounted or cabinet type for control rooms and duty rooms.

Selectable Models (Channels)

HQT series · ranges & combinations customizable

Model	Channels	Input	Output
HQT-3000-4	4 channels	4-20mA	RS485 + relay
HQT-3000-8	8 channels	4-20mA	RS485 + relay
HQT-3000-16	16 channels	4-20mA	RS485 + relay
HQT-3000-32	32 channels	4-20mA	RS485 + relay
HQT-3000-64	64 channels	RS485 bus	RS485 + relay

FAQ

How many detectors per controller?

Up to 64 point-type channels, or 128 bus detectors per unit, expandable via multi-unit networking.

Which protocols are supported?

4-20mA and RS485 / Modbus RTU input, optional Ethernet / 4G upload to DCS, PLC or fire-alarm hosts.

How does alarm linkage work?

Two alarm levels per channel with relay outputs to fans, valves and sound/light alarms, manual or auto reset.

How long are records kept?

Built-in blackbox stores the last 30 days of alarms and curves, exportable via USB.

Need a Complete System Design?

Tell us the detector count, gas types and interlock requirements.

Request a Proposal

Gas Alarm Controller

HQT-3000 SeriesGas Alarm Controllers