UK City 4p-75 4p-75c combustible gas (methane CH4) sensor


SKU: 582977122124 Category:


Please note we have developed tailor made signal boards for this sensor, which can be purchased separately.
Contact us for more details about application of this sensor or various signal boards suitable for this sensor.

Model: 4P-75 4P-75C

Brand: CITY

Material: mixture

Origin: other overseas regions

Output model category: analog sensor

Working principle: gas sensor

Applicable scenarios: environment, coal mine, metallurgy, fire fighting, petrochemical industry

Sensor category: gas sensor

Weight: 4g

4P-75C performance characteristics: (upgraded version of 4P-75)

Working principle: catalytic oxidation

Gas detection: combustible gas

Suitable for: methane, ethane, propane, butane, pentane, hexane, carbon monoxide and hydrogen

Not suitable for: higher hydrocarbons, alcohols, ketones, esters, hydrosulfides and other sulfur-containing compounds

Range: 0-100% LEL

Sensitivity*: 24±4 mV/% methane

T90 response time*: <20 seconds (methane)

Toxic resistance: anti-H2S poisoning, high-grade silica gel

H2S filter life: usually 1000ppm hours

Linearity: linear up to 3% methane


Working voltage: 3.0±0.02 VDC

Detection working current: 75±7 mA

Maximum power consumption: 263 mW

Resolution: 1% LEL


Shell material: stainless steel 316

Pin material: gold-plated brass

Weight: 24 grams (nominal)

Azimuth sensitivity: none


Operating temperature range: -20oC to +55oC

Working pressure range: 1 atmosphere ± 20%

Working humidity range: 0-90%RH non-condensing

The life cycle

Long-term range drift*: <5% of signal/month

Long-term zero drift*: <5% LEL methane/month

Recommended storage temperature: 0℃ to 20℃

Shelf life: 12 months from the date of shipment

Note: When calibrating the flow rate, under the condition of 20℃, 50% relative humidity, and 1013Mbar, at a speed of 300ml/min.


  1. It is forbidden to use an electric soldering iron to solder the lead wire of the sensor pin at high temperature. Please use it with the supplied pinhole!
  2. It is forbidden to use glue potting with strong heat, volatilization and corrosion properties!