Name: HQT-900 / HQT-600 Series Portable Gas Detector
Brand: Huanqitong
SKU: HQT-900
Availability: InStock

Overview

Portable gas detectors are built for people on the move: routine patrols, pre-entry testing for confined spaces, hot-work analysis, emergency response and leak investigation. Handheld pump-suction models include an internal sampling pump and can be fitted with an extension probe to sample inside closed vessels, trenches and tanks without personnel entering.

Standard 4-in-1 configuration is LEL / O2 / CO / H2S, expandable to 5, 6 or 7 gases with NH3, Cl2, SO2, VOC and others as needed.

Typical Specifications

Sampling Method

Diffusion or built-in pump suction (optional 1–5 m extension probe).

Battery

Rechargeable Li-ion, 8–12 hours continuous operation.

Protection

IP65 / IP67; explosion-proof version Ex ia IIC T4 available.

Working Together with Fixed Detectors

Fixed detectors provide area coverage while portable units handle patrol and confirmation. A typical setup: fixed gas detectors monitor key zones around the clock, and workers carry portable units for patrols and confined space entry — test before entry, monitor continuously during work.

Selectable Models

HQT series · ranges & combinations customizable

Model	Gas Combination	Sampling	Feature
HQT-900	4-in-1 LEL/O2/CO/H2S	Pump + diffusion	Standard composite
HQT-900-5	5-in-1	Pump + diffusion	With VOC
HQT-900-6	6-in-1	Pump + diffusion	With IR CO₂
HQT-900-7	7-in-1	Pump + diffusion	Full expansion
HQT-600-2/3/4-GPRS	2~4-in-1	Pump	4G wireless upload

FAQ

How long is the battery life?

Over 24 hours continuous operation with Type-C fast charge and replaceable battery; 4G version lasts about 10-12 hours.

Pump-suction vs diffusion?

Pump-suction actively samples via internal pump with probe for confined spaces and tanks; diffusion suits wearable patrolling.

Can the 4G version be viewed remotely?

Yes. The HQT-600 4G version uploads readings to cloud or mobile App in real time with remote alarm and positioning.

What is the explosion-proof rating?

Intrinsically safe Ex ib IIC T4 / T5, IP66, suitable for hazardous areas.

Need Help Choosing a Portable Model?

Tell us your target gases and work scenario and we will recommend the right configuration.

Portable Gas Detector

HQT-900 / HQT-600 SeriesPortable Gas Detectors