Brand: FORENSICS DETECTORSModel: FD-4S-PUMPUser Manual Detector: Click HereUser Manual Pump: Click HereQuick Start Guide: Click HereBlog Article: Click Here Features: 🎆 DETECTOR + PUMP: 4 gas meters with high-quality sensors that detect oxygen (O2), carbon monoxide (CO), hydrogen sulfide (H2S), and combustibles (LEL). Comes FACTORY-CALIBRATED. 🌈 COLOR DISPLAY: Color screen and graph functions allow for easy and intuitive operation. 💪 STRONG: Robust design constructed with high-strength ABS and anti-slip grip rubber. Waterproof, dust-proof, and explosion-proof. 🕵️ TRUSTWORTHY: 1-year limited warranty. Arrives with a signed and dated calibration certificate. Details: A professional MULTI-GAS 4 gas detector + PUMP by FORENSICS with advanced specifications for professional gas measurements. The pump allows for point probe or continuous sampling. 32-bit microprocessor with color LCD and graphing capability. Made for industrial users such as utility workers, refinery workers, firefighters, maintenance engineers, and those who spend time in sewers and waterworks, underground storage tanks, oil rigs, tanks, and silos in the maritime industry. Great setup to test the air quality before entering or working in a confined space. A data logging version of a 4-gas monitor is also available. For those requiring a 4-gas meter with a built-in pump, we recommend our FD-600-4GAS multigas detector. We also recommend our multi-gas NIST traceable calibration gas and calibration gas bottle regulator. For bump testing, we recommend our multi-gas bump gas. For those that just require a 4-gas meter for personal protection, we recommend our 4-gas meter FD-4A. If data logging is required, our FD-4S multigas detector is an excellent option. Includes: 4-gas detector, user manual, USB charging cable, calibration cover, and certified calibration certificate. The pump unit comes with the pump, stainless probe, 3 ft silicone tubing, USB charging cable, and user manual. Calibration Options: Calibration Service by Forensics DetectorsCalibration Tutorial (DIY) Calibration Kit (DIY sold separately):Calibration Gas (Multigas)Calibration Gas Regulator (C10)4 Gas Bump GasTubing Other Accessories & Parts (sold separately): Gas Sensor Replacement (CO)Gas Sensor Replacement (H2S)Gas Sensor Replacement (O2)Gas Detector Waterproof CaseGas Detector Stand Detector Specifications Sampling Method: natural diffusion (no pump) Combustible Gas (LEL) Detection: 0 - 100% with 1% resolutionOxygen (O2) Detection: 0 - 30% with 0.1% resolutionCarbon Monoxide (CO) Detection: 0 - 999 ppm with 1 ppm resolutionHydrogen Sulfide (H2S) Detection: 0 - 100 ppm with 1 ppm resolutionRecommended Calibration Period: 12 monthsGas Sensor Type: Electrochemical (CO, H2S, O2) & Catalytic (EX LEL)Gas Sensor Life: 2 - 3 yearsError: ≤ ± 5% F.S. Response Time: ≤ 30 sec Store / Operating Temp: 0°F - 122°FStore / Operating Humidity: