Mercaptan Gas Detector | USA NIST Calibration

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  • $995.00
  • Regular price $1,995.00


Model: FD-90A-CH4S
User Manual:
Click Here
Blog Article: Click Here


  • ⚛️ DETECT: Ultrasensitive, Mercaptan (CH4S) gas detector, 0 - 10 ppm with 0.01 ppm resolution. Comes FACTORY-CALIBRATED.
  • 🌷 ACCURATE: Electrochemical cell sensor with accuracy ≤ ± 10% F.S. and response time T < 30 sec. Zero and span calibration options. 
  • 🎆 ALARMS: Adjustable audio, visual, and vibration alarms. Temperature, battery, and time tracking.
  • 💪 STRONG: Shockproof, water-resistant, dustproof, and explosion-proof. Belt clip, charger, cable, and case included.
  • 🕵️ TRUSTWORTHY: ** 1-year limited warranty ** Arrives with calibration and QA certificates ** Product tested and verified in the USA ** 

Details: This is our professional Mercaptan (CH4S) gas detector by FORENSICS with advanced functions that comes factory-calibrated. Mercaptan is sometimes referred to as mercaptan, methyl mercaptan, or methanethiol. Its chemical formula is presented as CH4S, MeSH, or CH3SH. Mercaptan is used as a gas odorant; an intermediate in the production of pesticides, jet fuels, and plastics; and in the synthesis of the amino acid methionine. Because methyl mercaptan is a gas a ambient temperature, the most likely exposure routes are inhalation and dermal.  It has pungent garlic, rotten cabbage, or a skunk-like odor. OSHA PEL is recommended at 10 ppm over 8 hours and NIOSH recommended exposure is 0.5 ppm over 10 hours. 

Included: Mercaptan gas detector, belt clip, sling, English manual, USB charging cable, calibration cover, and USA NIST calibration certificate.

Calibration Kit (sold separately): 
Calibration Gas (H2S) (Surrogate Gas 5ppm H2S : 10ppm CH4S is used for calibration - email us for this special H2S 5ppm concentration)
Calibration Gas Regulator (C10) 

Bump Gas (H2S)

Other Accessories (sold separately):  
Pump and Probe
Gas Detector Hard Case

Gas Detector Pouch
Gas Detector Stand
Gas Sensor Replacement (email us)

Calibration Service (sold separately):  
Gas Detector Calibration Service


Mercaptan (CH4S) detection: 0 - 10 ppm with 0.01 ppm resolution
Calibration Location: Los Angeles, California, USA
Calibration Standard: USA NIST Traceable Gas Source
Recommended Calibration Period: every 6 to 12 months
Gas Sensor Type: electrochemical gas sensor
Gas sensor life: 2 - 3 years
Accuracy: ≤ ± 5% F.S
Response time: T < 30 sec
Indicators: LCD indicates the time, concentration, internal temperature, and battery level 
Alarm: Indication of alarm, fault, and low voltage with LED, sound, and vibration
Operating temperature: 14F - 122F
Operating humidity: < 95% RH non-condensing
Voltage: DC 3.7V Li-battery 1500 mAh
Working time: > 24 hours
Charging time: 3 hours
Sensor life: 2 - 3 years
Protection category: IP65
Explosion rating: ATEX certified Ex ib IIB T3 Gb
Weight: 5 oz / 140 g (including battery)
Dimensions: 4.3 x 2.3 x 1.7 inches