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Jinan Hengxin Safety Technology Co., Ltd
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HX-DT gas detector
On site maintenance is free of calibration and settings, making it convenient and fast. Multiple communication methods coexist, including two wire, th
Product details

The HX-DT series toxic gas detector detects gas concentration online, displays concentration values (display type), alarms for exceeding standards (alarm type), and transmits gas concentration to the collection equipment through communication cables. Adopting modular design (including detector module and sensor module), anti misplacement lockable connection wires are used between modules. An independent sensor module that can be paired with multiple types of sensors. Implemented on-site maintenance free, allowing for direct module replacement without the need for re zeroing, calibration, or setup. The detector equipped with an infrared remote control can achieve remote operation up to 5 meters away.

Principle: The detector adopts an imported gas sensor, which can convert the gas concentration signal into a voltage signal in a linear proportion. After amplification and processing, it is sent to the microcontroller for analog-to-digital conversion, and the converted data signal is analyzed and processed linearly by software. Handling process: Fault diagnosis concentration judgment concentration processing conversion output. The output signal is transmitted to the controller (HXK series) through RS485 standard signal/4-20mA standard signal.

This series of detectors has high stability, low power consumption, multiple output modes, and strong anti-interference ability. Especially suitable for flammable and explosive places with harsh working environments that are difficult for workers to approach. This product can be widely used in departments such as petrochemicals, oil fields, oil depots, liquefied gas stations, coal mines, environmental protection, fire protection, etc. It is an ideal monitoring instrument to ensure property and personal safety.

execution standard

GB12358-2006 General Technical Requirements for Workplace Gas Detection and Alarm Devices

GB3836.1-2010 Explosive Atmosphere Part 1: General Requirements for Equipment

GB3836.2-2010 Explosive Atmosphere Part 2: Equipment Protected by Explosion proof Enclosures "d"



Product actual photos

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Technical Specifications

Gas detection toxic gas
sampling method Diffusion type
Detection Principle Electrochemical/Photoionization (PID)
Range 0-10, 0-50, 0-100ppm ········ (adjusted according to gas type)
Testing Unit PPM
Alarm concentration Set alarm points based on the type of gas being detected
Working Voltage DC24V±6V
power waste 3.5W
Signal transmission distance ≤ 1500 meters
output signal Three wire system (4-20mA standard signal)/Four wire system (RS485 standard signal)
electrical interface G1/2 "internal thread
Explosion-proof rating Exd II CT6 Gb
Protection level IP66
texture of material aluminum alloy
relative humidity ≤93%RH
pressure range 86kPa~106kPa
Display optional
Calibration HX series controller/probe motherboard button/remote control (with display)


Indicators for implementing national/industry standards

Detection Principle

Electrochemical formula

Gas detection Toxic and harmful gases such as CO and NH3
Catalytic combustion/semiconductor/infrared

Flammable gases such as alkanes

Alarm error ± 15% of the alarm set value (electrochemical)

Indication error (displayed on the controller)

± 5% F.S (electrochemical) ± 5% F.S (flammable)
± 3% LEL (flammable)
Response time (T90) ≤ 60s (electrochemical reference schedule) Operating temperature -20 ℃~+50 ℃ (electrochemical)
≤ 30s (flammable) -40 ℃~+70 ℃ (flammable)
Sensor storage life 1 year (catalytic/semiconductor) Sensor lifespan 3 years (catalysis)/5 years (semiconductor)/10 years (infrared)
6 months (electrochemistry) 1-2 years (electrochemistry)
storage environment Catalysis/semiconductor (storage temperature -20 ℃ -+50 ℃, storage humidity ≤ 95% RH); Electrochemistry (0 ℃ -20 ℃, storage humidity 15% -60% RH);
There are no organic solvents, flammable liquids, flammable gases or sulfides, chlorides, lead, silicon elements, or interfering toxic and harmful gases on site.
Gas to be tested range Alarm Settings Factory default alarm settings
CO 0-1000ppm (adjustable) lower limit 200ppm (adjustable)
高限 500ppm (adjustable)
H2S 0-100ppm (adjustable) lower limit 20ppm (adjustable)
高限 50ppm (adjustable)
NH3 0-100ppm (adjustable) lower limit 20ppm (adjustable)
高限 50ppm (adjustable)
CL2 0-10ppm (adjustable) lower limit 2ppm (adjustable)
高限 5ppm (adjustable)
O2 0—30%VOL lower limit 18% VOL (modifiable)
高限 23% VOL (modifiable)
VOC 0-100ppm/0-1000ppm lower limit 20/200ppm (adjustable)
高限 50/500ppm (adjustable)
flammable gas 0-100%LEL/ppm lower limit 20%LEL
高限 50%LEL



◆ Linear algorithm adapted to various sensors, capable of detecting multiple gases

◆ Adopting imported sensors, corresponding rapid and accurate

◆ Anti interference, anti poisoning, long lifespan

◆ On site maintenance without calibration and setting is convenient and fast

◆ Coexistence of multiple communication methods including three wire and four wire

◆ Infrared remote control operation zero calibration



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