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Home > Test & Measurement > Gas Detectors

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Fixed Methane (CH4) Gas Detector, 0 to 100% LEL

$2093.23

Buy fixed methane gas detector online at good price. Measuring range 0-100% LEL, resolution 1% LEL, optional output signal 4-

SKU: CHN-GAS-CH4-A

Free Shipping Worldwide

Delivery date: 6-12 days

Overview
Documents

Low price methane gas detector for sale. Measurement range 0-100% LEL, supports remote control with output signal 4-20mA or RS485. The CH₄ gas detector has fixed design, which is used in methane concentration detecting and monitoring, sound and light alarm, real-time display, small size, lightweight, convenient mounting.

Features

Methane gas detector adopts high precision sensor for accurate gas leak detection.
Methane gas detector is equipped with 3-wire system 4-20mA analog output, relay output, RS485 output (optional).
The CH₄ gas detector is compatible with various controlled alarms, PLC, DCS and other control system, and can be remote monitored.
Explosion-proof design, fast, relaible and stable.
Infrared ray controller can remote control the alarm point settings, zero calibration, and address modification.
Two-stage alarm with sound and light, and the alarm point is settable.
The methane gas detector has self-calibration function, and three standard keys will be used to realize on-site maintenance.
The CH₄ gas detector can output one or two on-off signals, can drive ventilator, solenoid valve or other external devices.

Specification

Model	CHN-GAS-CH4-A
Detection Principle	Electrochemistry
Gas	Methane (CH₄)
Range	0-100% LEL
Resolution	1% LEL
Accuracy	≤±3% F.S.
Responce Time	≤10s
Repeatability	≤±1%
Recovery Time	≤10s
Linearity Error	≤±1%
Zero Shift	≤±1% (F.S./year)
Signal Output (Optional) ^Note	4-20mA, or RS485 (transfer card included); Relay output: one group of relay output (1NO+1NC, 24V 100mA) for one alarm (default), or two groups of relay output (2NO+2NC, 24V 100mA) for high/low alarm (optional).
Alarms	Sound, light
Display	High light nixie tube display
Installation	Wall-mounted, piping type, flow-type (according to the detected environment)
Connection	G1/2 male thread explosion-proof flexible pipe
Operating Time	24h
Explosion-proof Grade	Ex d llC T6
Protection Grade	IP65
Certification	CE, ATEX
Working Voltage	12~36V DC
Case Material	Die-casting aluminum housing
Operating Temperature	-20℃~50℃
Operating Humidity	0~95%RH (non-condensing)
Dimension	20617990mm
Weight	≤1.6kg
Accessories	Power adapter: Input 100-240VAC 50/60Hz, Output 24VDC 2A (Optional USA plug & Europe plug)

Note: The output signal 4-20mA and RS485 CANNOT be used at the same time.

Fixed Methane (CH₄) Gas Detector Dimension (Unit: mm)

***Other Common Gases and Ranges Available for Fixed Gas Detectors

Gas	Range (Default)	Range (Optional)	Resolution
Combustible Gas (EX)	0-100% LEL	0-100% LEL	1%LEL
Oxygen (O₂)	0-30% Vol	0-25% Vol	0.01%Vol
Carbon Monoxide (CO)	0-1000 ppm	0-100/500/1000/2000 ppm	0.01ppm/0.1ppm/1ppm
Hydrogen Sulfide (H₂S)	0-100 ppm	0-50/100/500/1000 ppm	0.01ppm/0.1ppm/1ppm
Methane (CH₄)	0-100% LEL	0-100% LEL	1%LEL
Chlorine (Cl₂)	0-10 ppm	0-10/20/50/100 ppm	0.01ppm/0.1ppm
Hydrogen Chloride (HCL)	0-20 ppm	0-10/20/50/100 ppm	0.01ppm
Hydrogen (H₂)	0-1000 ppm	0-1000/2000/5000/10000 ppm	0.1ppm/1ppm
Nitric Oxide (NO)	0-100 ppm	0-100/250/500/1000 ppm	0.01ppm/0.1ppm/1ppm
Nitrogen Dioxide (NO₂)	0-20 ppm	0-20/50/100 ppm	0.01ppm/0.1ppm/1ppm
Formaldehyde (CH₂O)	0-10 ppm	0-10/20/-50/100 ppm	0.01ppm/0.1ppm/1ppm
Ozone (O₃)	0-10 ppm	0-1/5/10/20/50/100 ppm	0.001ppm/0.01ppm/0.1ppm
Carbon Dioxide (CO₂)	0-2000 ppm	0-1000/2000/5000/10000/50000 ppm	0.1ppm/1ppm
Sulfur Dioxide (SO₂)	0-20 ppm	0-10/20/100 ppm	0.01ppm/0.1ppm
Ethylene Oxide (ETO)	0-100 ppm	0-20/50/100/500/1000 ppm	0.01ppm/0.1ppm/1ppm
Phosphine (PH₃)	0-10 ppm	0-10/20/50/100/200/500/1000 ppm	0.01ppm/0.1ppm/1ppm
Nitrogen (N₂)	0-100% Vol	0-100% Vol	0.01%Vol
Hydrogen Fluoride (HF)	0-10 ppm	0-50 ppm	0.01ppm

Note: Some common gases and the measuring ranges are listed in the above table. For more information, please feel free to contact us.

Tips: How to improve the service life of methane gas detector?

The methane gas detector should be calibrated and tested regularly.
When replacing the probe of CH₄ gas detector, in addition to a certain sensor activation time, the instrument must be recalibrated. In addition, before using the methane gas detector, use the standard gas for response detection to ensure protection of the instrument.
Pay attention to the interference between other sensors and the methane gas detector.
Although a composite gas detector can detect multiple gases at the same time, the fixed gas detector is not suitable for any combination of toxic and harmful gases. Generally speaking, each gas detector corresponds to a specific detection gas, but any gas detector cannot be absolutely effective.
Pay attention to the life of methane gas detector.
CH₄ gas detector has a certain service life. Generally, in portable gas detectors, LEL sensors have a longer life span and can generally be used for about three years. The life of the photoionization detector is four years or longer. The lifetime of electrochemical specific gas detectors is relatively short, generally one to two years. The life span of the oxygen sensor is short, about a year or so.

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