DTS-A004 4-in-1 Fixed Gas Detector - Henan Duotesi Electronic Technology Co., Ltd.

Product Introduction

The four-in-one gas detector is a new type of gas detector produced by our company. It adopts a sensor moduleization scheme without the need for calibration. The product settings are stored in the module, which is convenient for replacement and after-sales maintenance. It has excellent repeatability and temperature/humidity characteristics, a long service life, and is easy to operate. It is suitable for detecting gas concentrations in industrial environments.

The four-in-one gas detector converts the signal of the gas concentration to be detected in the air into a digital signal for display. It uses a three-wire 4-20mA current signal and RS485 signal output method. It can be optionally equipped with wireless communication, which is convenient for users to choose.

Product Features

Alarm record query function.

Detection accuracy and Adjustable range.

Long life, high sensitivity, low drift, stable and reliable work.

Sensor failure self-test, two-level concentration alarm, with relay output function.

Digital display of gas concentration and working status. Temperature compensation, automatic zero correction function.

4- 20mA standard analog output and RS485 digital output, which can be uploaded to PLC and DCS system.

Infrared remote control mode, without opening the cover can be adjusted to the detector, safe and convenient.

Adopting explosion-proof design. suitable for hazardous conditions 1. 2 zones.

Technical Specifications

Detection Principle	Semiconductor, catalytic combustion, electrochemical, infrared, PID
Sampling Method	Natural diffusion
Display Method	High-brightness red digital tube
Status Indication	4 indicator lights: power, fault, alarm 1, alarm 2
Ambient Temperature	-20°C to 50°C
Relative Humidity	< 95% RH
Explosion-Proof Type	Flameproof enclosure
Explosion-Proof Rating	Ex d IIC T6 Gb
Power Supply	DC 24 V ± 30%
Output Signal	Current: 4–20 mA; switching output: 2 channels
Adjustment Method	Infrared remote control
Power Consumption	≤ 3 W
Cable Requirements	≥ 1.5 mm² shielded cable
Max. Distance Between Detector and Host	≤ 1000 m
Weight	≤ 2000 g
Pressure Range	86–106 kPa

Application Fields

The four-in-one gas detector is applicable to industrial sites where toxic gases exist, such as power plants, oil refineries, chemical plants, liquefied gas stations, gas boiler rooms, gas filling stations, spray painting rooms, etc., for gas safety detection and alarm.

Measurable Gas

tracer gas	range	Alarm value	least count	response time
combustible gas (E_X)	0-100%LEL	20%LEL	1%LEL	≤ 10 seconds
oxygen (O₂)	0-30%VOL	19.5%Vol	0.1%Vol	≤ 15 seconds
carbon monoxide(CO)	0-1000ppm	50ppm	1ppm	≤25 seconds
carbon dioxide (CO₂)	0-5%VOL	0.2%VOL	0.01%VOL	≤30 seconds
formaldehyde (CH₂O)	0-50ppm	10ppm	0.1ppm	≤ 40 seconds
ozone (O₃)	0-20ppm	5ppm	0.1ppm	≤30 seconds
Hydrogen sulfide(H₂S)	0-100ppm	15ppm	1ppm	≤ 30 seconds
sulfur dioxide (SO₂)	0-20ppm	5ppm	0.1ppm	≤ 30 seconds
nitric oxide (NO)	0-250ppm	20ppm	1ppm	≤60 seconds
nitrogen dioxide(NO₂)	0-20ppm	5ppm	0.1ppm	≤ 60 seconds
nitrogen oxide (NO_X)	0-100ppm	20ppm	1ppm	≤ 60 seconds
chlorine gas(CL₂)	0-20ppm	5ppm	0.1ppm	≤ 60 seconds
ammonia gas(NH₃)	0-100ppm	15ppm	0.1ppm	≤60 seconds
hydrogen (H₂)	0-1000ppm	50ppm	1ppm	≤ 60 seconds
hydrogen cyanide(HCN)	0-20ppm	2ppm	0.1ppm	≤ 60 seconds
Hydrogenchloride(HCL)	0-50ppm	5ppm	0.1ppm	≤60 seconds
Phosphine(PH₃)	0-20ppm	2ppm	0.1ppm	≤ 60 seconds
Ethylene oxide (ETO)	0-100ppm	20ppm	1ppm	≤120 Seconds
phosgene (COCL₂)	0-100ppm	5ppm	1ppm	≤ 60 seconds
silane (SiH₄)	0-50ppm	10ppm	0.1ppm	≤ 60 seconds
Fluoride (F₂)	0-20ppm	5ppm	0.1ppm	≤ 30 seconds
hydrogen fluoride(HF)	0-20ppm	5ppm	0.1ppm	≤30 seconds
bromine hydride(HBr)	0-50ppm	10ppm	0.1ppm	≤60 seconds
arsenic hydride(AsH₃)	0-20ppm	1ppm	0.1ppm	≤ 30 seconds
Hydrazine, hydrazine(N₂H₄)	0-100ppm	20ppm	1ppm	≤ 60 seconds
Tetrahydrothiophene(THT)	0-100mg/m³	20mg/m³	1mg/m³	≤ 60 seconds
Bromine (BR₂)	0-20ppm	5ppm	0.1ppm	≤ 60 seconds
ethyne (C₂H₂)	0-100%LEL	20%LEL	1%LEL	≤60 seconds
ethylene (C₂H₄)	0-100%LEL	20%LEL	1%LEL	≤ 60 seconds
alcohol (C₂H₆O)	0-100%LEL	20%LEL	1%LEL	≤30 seconds
carbinol (CH₄O)	0-100%LEL	20%LEL	1%LEL	≤30 seconds
carbon disulfide (SC₂)	0-50ppm	10ppm	0.1ppm	≤120 Seconds
acrylonitrile (C₃H₃N)	0-50ppm	10ppm	0.1ppm	≤60 seconds
aminomethane(CH₅N)	0-50ppm	10ppm	0.1ppm	≤60 seconds
styrene (C₈H₈)	0-100ppm	20ppm	1ppm	≤30 seconds
chlorylene (C₂HCL₃)	0-50ppm	20ppm	0.1ppm	≤ 60 seconds
Celfume (CH₃Br)	0-100ppm	20ppm	1ppm	≤30 seconds
benzene (C₆H₆)	0-100ppm	20ppm	1ppm	≤ 30 seconds
methylbenzene(C₇H₈)	0-100ppm	20ppm	1ppm	≤ 30 seconds
dimethylbenzene(C₈H₁₀)	0-100ppm	20ppm	1ppm	≤30 seconds
Sulfur hexafluoride(SF6)	0-100ppm	20ppm	1ppm	≤30 seconds
VOC/TVOC	0-1000ppm	50ppm	1ppm	≤ 30 seconds
Laughing gas (N2O)	0-100ppm	20ppm	0.01ppm	≤ 30 seconds
argon (Ar)	0-100%vol	20%Vol	1vol	≤ 30 seconds

Table of Contents

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