GTYQ-TCB2 Point-Type Gas Detector

Monitor a selected gas at a fixed location and make the alarm visible both locally and in the control system.

Match the point to the hazard

Specify the sensor and measuring range for the gas present at the installation site.
Make alarms easy to notice

Integrated sound and light indication helps nearby staff recognize an alarm at the detector.
Plan for service and integration

The listed terminal arrangement, infrared control and signal options support wiring and routine maintenance.

IP66 protection class. Confirm gas, range, output signal, mounting position and site protection requirements.

Overview

This product integrates high-performance gas-sensitive components and microcontroller technology with precision SMD manufacturing, delivering outstanding repeatability, reliable temperature/humidity performance, strong anti-interference capability, extended service life, and user-friendly operation. Designed for gas concentration and leakage detection, it converts ambient gas concentration signals into electrical signals. The output supports three-wire (4-20) mA current signals, RS485 four-wire bus signals, or two-wire configurations, featuring long-distance transmission and simplified wiring requirements. This product is designed for gas safety detection, alarm, and control in environments containing gases, including gas pipelines, municipal utility tunnels, research institutions, hospitals, and schools. It is suitable for hazardous areas with explosive flammable gases classified as Grade II Ato II C and temperature ranges of T1 to T6.

Key Features

Gas Sensing & Local Warnings

Fast response speed
Diffusion detection
Integrated audible & visual alarm
Wide Gas Selection
High Sensitivity & Stable Reliability
Flameproof Design

Control-System Signals & Connections

2-Channel Switch Quantity Output
Optional 4-Bus Signal or 4-20mA Signal ；Optional LCD Display

Installation, Power & Service

Infrared remote control operation
IP66 protection grade
Independent wiring terminal unit
Dual-Chamber Design
OEM & ODM & OBM

Technical Specifications

Applicable gas	Ex, toxic hazardous gas, O2 etc.
Sampling method	natural diffusion
Detection principle	catalytic bead, electrochemical, infrared,laser,semiconductor etc.
Measuring range	0~100%LEL(combustible); 0~100ppm(toxic) (according to gas type)
Display method	LED digital display,LCD liquid crystal display(optional)
Operating voltage	DC24V/DC36V/AC220V±15% (subject to order specification and nameplate)
Alarm	audible & visual alarm
Response time T90	≤30s(combustible) (according to gas type)
Ambient temperature	-40℃~+70℃(combustible); -25℃~+55℃(toxic)
Relative humidity	20~93%RH, non-condensing
Accuracy	±3%FS(combustible) (according to gas type)
Ambient pressure	86~106kPa
Output signal	3-wire 4-20mA / 4-bus RS485 / 2-wire signal output (subject to order specification and nameplate)
Transmission distance	≤1000m
Connection cable	RVVP 3×1.5mm², RVVP 4×1.5mm², RVVP 2×1.5mm²
Other functions	dual relay output, sensor rainproof hood
Ex mark	Ex db II CT6 Gb; Ex tb IIIC T80℃ Db
Ex certificate No.	CE25.7396X
Protection grade	IP66
Metrology approval No.	2018C241-41

Videos

Available Gases & Detection Ranges

The gases and ranges below are configuration options. GTYQ-TCB2 Point-Type Gas Detector; confirm the final sensor combination and ranges with our team.

Common Gas Parameter listing
Gas detected	Measuring Range	Optional Range	Resolution Rat	Response Time
LEL -combustible gas	0-100%LEL	0-100%VOL (Infrared or catalytic )	1%LEL/1%vol	≤10s
carbon monoxide	0-1000PPm	0-500/2000/5000PPm	0.1/1PPm	≤10s
TVOC	0-100PPM	0-100PPM	0.1PPm/1PPM	≤15s
hydrogen	0-100%LEL	0-1000PPM	1%LEL/1PPM	≤15s
natural gas	0-100%LEL	0-100%LEL	1%LEL	≤10s
Oxygen-O2	0-30%VOL	0-30%、0-100%VOL	0.1%vol	≤10s
ozone	0-10PPm	0-20、100PPm	0.01PPm/0.1PPM	≤15s
hydrogen sulfide-H2S	0-100PPm	0-50、200、1000PPm	1/0.1PPm	≤10s
Methane-CH4	0-100%LEL	0-100%VOL	1%LEL/1%vol	≤10s
fluorine	0-10PM	0-1、10PPM	1/0.1PPm	≤15s
hydrogen chloride	0-20PPm	0-20/50PPm/100PPM	0.01/0.1PPm	≤15s
Nitrogen-N2	0-30%VOL	0-30%VOL、100%VOL	0.1%LEL/1PPM	≤10s
hydrogen	0-100%LEL	0-1000PPm	1%LEL/0.1PPm	≤15s
chlorine	0-20PPm	0-10、100PPm	0.1PPm	≤15s
ammonia gas	0-100PPm	0-50、500、1000PPm	1/0.1PPm	≤15s
oxynitride	0-20PPm	0-50、1000PPm	0.1/1PPm	≤15s
methanal	0-20PPm	0-50、100PPm	1/0.1PPm	≤15s
sulfur dioxide	0-20PPm	0-50、1000PPm	0.1/1PPm	≤15s
nitric oxide	0-250PPm	0-500、1000PPm	1PPm	≤15s
nitrogen oxide	0-20PPm	0-50、1000PPm	0.1/1PPm	≤15s
phosphine	0-20PPm	0-20、100PPm	0.1PPm	≤15s
acrylonitrile	0-100PPM	0-100PPm	0.1/1PPm	≤15s
carbon dioxide	0-5000PPm	0-1%/5%/10%VOL(Infrared )	1PPM/0.01%VOL	≤15s
hydrogen fluoride	0-10PPm	0-1、10、50、100PPM	0.01/0.1PPm	≤15s
Xylene/methylbenzene	0-20PPm	0-5、10、50、100PPm	0.01/0.1PPm	≤15s
oxirane	0-100PPm	0-100PPm	1/0.1PPm	≤15s
For other gases and measuring ranges, please contact us directly!
Note: Not all gases and range are listed, if you need more information, please contact us.

Request a Quote

Tell us the target gas, measuring range, application and quantity. Confirm gas, range, output signal, mounting position and site protection requirements.

GTYQ-TCB2 Point-Type Gas Detector