Fixed Formaldehyde Gas Detector, 0 to 10/20/50/100 ppm

$727.08

Buy formaldehyde gas detector from professional manufacturer. Selectable detecting range 0~10/20/50/100 ppm, output signal 4-

SKU: CHN-GAS-CH2O-A

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Delivery date: 6-12 days

Overview
Documents

Fixed gas detector for sale, used to detect and monitor formaldehyde concentration. Measuring range 0 to 10/20/50/100 ppm, remote control with optional output signal 4-20mA/ RS485. The CH₂O gas detector has functions of sound & light alarm, real time display and 24 hours online work.

Features

Formaldehyde gas detector adopts high precision sensor for accurate gas leak detection.
Formaldehyde gas detector is equipped with 3-wire system 4-20mA analog output, relay output, RS485 output (optional).
The CH₂O 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 formaldehyde gas detector has self-calibration function, and three standard keys will be used to realize on-site maintenance.
The CH₂O gas detector can output one or two on-off signals, can drive ventilator, solenoid valve or other external devices.

Specification

Model	CHN-GAS-CH2O-A
Detection Principle	Electrochemistry
Gas	Formaldehyde (CH₂O)
Range (Optional)	0-10 ppm
	0-20 ppm
	0-50 ppm
	0-100 ppm
Resolution	0.01 ppm, 0.1 ppm, 1 ppm (related to the selected range)
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 Formaldehyde (CH₂O) 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: Electrochemistry principle of the formaldehyde gas detector.

Formaldehyde gas detector consists of a plug-in electrochemical sensor, an intelligent transmission module and a sensor splash cover. Working mode of the electrochemistry sensor is to detect a certain amount of gas diffusion. Oxygen first passes through a sintered stainless steel filter, and then enters the sensor through the gas permeable membrane on the sensor. Between the electrode of the sensor and the electrolyte, oxygen is consumed and a corresponding current is generated between the anode and the cathode. When current flows in the sensor, the lead positive electrode is oxidized to lead oxide. Intensity of the output current and the concentration of oxygen have an absolute linear function relationship. The rapid response capability of electrochemistry sensor enables the formaldehyde gas detector to continuously monitor the concentration of formaldehyde.

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