Handheld Infrared Methane Gas Detector JHB Series

Product catalog summary

Introduction
This document details the specifications and functionalities of the Infrared (NDIR) Portable Methane (CH4) Gas Detector developed by Wuhan Cubic Optoelectronics Co., Ltd. The device integrates advanced NDIR technology and is designed for detecting methane gas leaks and measuring CH4 concentrations, particularly in biogas generation processes.

Working Principle
The detector operates on the principle that methane gas absorbs infrared light at specific wavelengths, following Lambert-Beer's Law. The absorption intensity is used to determine the gas concentration, with the mathematical model described as I = I0e-kpl, where I0 is the intensity of the incoming ray, I is the transmitted beam, l is the thickness of the gaseous medium, p is the gas concentration, and k is the absorption coefficient.

Features

Independent intellectual property rights for infrared gas analysis technology.
Dual-range settings for high methane concentrations with alarm functions.
Customizable high and low alarm points.
Auto-zero calibration feature.
Fast response and proliferation sampling.
Real-time gas concentration display via LED digital tube.
Rechargeable lithium battery, compact size, and simple operation.

Specifications

Measurement Method: CH4 NDIR
Range: 0% to 100% vol
Resolution: 0.01% for 0.00-10.0% vol, 0.1% for 10.0%-100% vol
Precision: ≤±0.1% for 0-1%, ≤±10% of reading for 1-100%
Response Time: T90 25s at 20℃
Working Environment: Pressure 86-106kpa, Temperature 0℃ to 40℃, Humidity ≤98%RH
Warm-up Time: 30s
Standby Time: ≥10h
Sampling: Diffusion type
Power Supply: DC3.7V 1300mAh lithium battery
Dimensions: 93mm×62mm×25mm
Weight: About 0.15kg

Applications
The portable CH4 detector is suitable for various industries, including chemical, oil & gas storage, mining, metallurgy, liquefied gas stations, spray painting, petroleum, fuel gas transport, and natural gas leak detection.

Alarming Functions

Alarm settings can be customized, with a difference not exceeding ±0.05% for the full range of 0-10%.
Alarm sound intensity is at least 75dB(A) at a distance of 1m.
Optical signal visibility in the dark should be at least 20m.

Instrument Configurations
The document includes a configuration section with images and remarks for the gas detector and remote controller, indicating input and output specifications.

Catalog excerpts

Handheld Infrared Methane Gas Detector JHB Series-1

INFRARED (NDIR) PORTABLE METHANE (CH4) GAS DETECTOR Wuhan Cubic Optoelectronics Co. ， Ltd ADD ： Fenghuang No.3 Road, Fenghuang Industrial Park,Eastlake Hi-tech Development Zone, Wuhan, 430205, China TEL ： +86-27-87405251 FAX ： +86-27-87401159 [email protected]

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Handheld Infrared Methane Gas Detector JHB Series-2

Working principle  CH4 gas is composed of different types of atoms have absorption spectrum in infrared range. Absorption intensity abides by Lamber-Beer’s Law. Basic working principle of NDIR sensor is as below, Inlet detector Light spectral filter  Basic mathematical model ： A majority of both organic and inorganic polyatomic gas have specific absorptive wavelength in infrared region. It observes Lambert-Beer Law formula I ＝ I0e-kpl when infrared light is coming through. Light absorption intensity “i” can be described as i=I0-I= I0 (1- e- kpl). I0: intensity of incoming ray. I: transmitting...

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Handheld Infrared Methane Gas Detector JHB Series-3

■ This instrument is a perfect integration of worldleading technology (NDIR) and premium components. It can be used in measuring CH4 leakage detection. ■ It can be used in measuring CH4 concentration in the process of biogas generation. Meanwhile, it's able to detect biogas leakage.

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Handheld Infrared Methane Gas Detector JHB Series-4

Feature ﹒Independent intellectual property rights of infrared gas analysis technology ﹒Dual-range setting with high concentrations of methane gas leak detection and alarm function ﹒ High and low alarm points can be customized settings ﹒Air auto-zero calibration feature ﹒ Proliferation Sampling ﹒Fast response ﹒LED digital tube display real-time gas concentrations ﹒Rechargeable lithium battery Small size, sim

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Handheld Infrared Methane Gas Detector JHB Series-6

Application Portable CH4 detector is an ideal instrument with alarm function to detect the concentration of CH4, such as chemical industry, oil & gas storage, mine, metallurgy, liquefied gas station, spray paint, petroleum, fuel gas transport, as well as the leakage of nature gas. | | |

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Handheld Infrared Methane Gas Detector JHB Series-7

 Alarming functions Alarm is able to set the alarm at any point, alarm value and set value displays the difference should not exceed ± 0.05% (the full range 0-10%) Alarm sound level intensity at a distance of not less than 75dB (A) in the distance of 1m. Optical signal visibility in the dark should not be less than

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