Industrial Scientific
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| Brand | Industrial Scientific |
|---|---|
| Origin | USA |
| Model | M40 |
| Instrument Type | Portable Gas Detector |
| Housing Material | High-impact, RFI/EMI-resistant composite |
| Dimensions | 10.9 cm × 6.22 cm × 3.48 cm |
| Weight | 244 g (instrument only), 326 g (with SP40 pump) |
| Gas Detection Capability | 1–4 gases simultaneously (O₂, H₂S, CO, combustible gas/LEL) |
| Sensor Types | Electrochemical (O₂, H₂S, CO), Catalytic Bead (combustibles) |
| Measurement Ranges | CO: 0–999 ppm (1 ppm resolution), H₂S: 0–500 ppm (1 ppm), O₂: 0–30% vol (0.1% vol), LEL: 0–100% LEL (1% LEL) |
| Battery | Rechargeable lithium-ion |
| Runtime | 18 h (instrument only, no alarm), 12 h (with SP40 pump, no alarm) |
| Display | Backlit LCD with amber backlight, high-contrast graphics, simultaneous 4-gas readout |
| Alarms | Visual (high-intensity LED flash), audible (90 dB), and vibratory |
| Data Logging | Up to 75 hours of time-stamped gas concentration data |
| Operating Temperature | −20 °C to +50 °C |
| Humidity Range | 15–95% RH (continuous), 0–99% RH (intermittent, non-condensing) |
| Ingress Protection | IP65 |
| Calibration | Simultaneous multi-sensor bump test and full calibration via single-gas or multi-gas standard |
| Warranty | 12 months |