| Auto zero | Yes |
| Calibration | Automatic |
| Backlight | Low light (auto); alarm condition (auto); reactivation on demand |
| Full function self-test | Sensor integrity, circuitry and battery; audible/visual alarms |
| Sensor | Plug-in, electrochemical cell (toxic and oxygen); catalytic (LEL) |
| User field options | Confidence beep, pass code protection, latching alarms, calibration due date, “SAFE” display function |
| Alarm Indicators | Clearly advises alarm levels both visually and audibly |
| Visual alarms | Two flashing alarm bars visable from all angles |
| LCD | indicates gas present and alarm levels encountered |
| Audible alarm | Typically 95 dB at 30 cm variable pulsed audible alarm |
| Vibrator alarm | Pulses warning in gas alarm conditions, or for any status alarms |
| Other | Low battery, over range, multiple gas and missing sensor |
| Alarm Levels | Instantaneous Low Alarm for all gases; instantaneous High Alarm for all gases
TWA (time weighted average) and STEL (short term exposure limit) for H2S and/or CO
OL (over limit alarm) for combustible gases |
| LCD | Continuous, alphanumeric gas readout and status display advises: |
| Gases monitored | H2S, CO, O2, combustibles (0-100% LEL or 0-5.0% methane) |
| Gas concentration | Simultaneous and continuously displays gas concentration(s) present (in ppm, %LEL, or % v/v) |
| TWA ppm or % | Records STEL and TWA exposures and displays on demand |
| Peak ppm or % | Records and displays peak exposure to gas and displays on demand |
| Alarm setpoints | Displayed on activation |
| Tests |
| Full function self-test | Full function self-test on activation |
| Battery | Continuous |
| General Specifications | Rugged, composite material with integral concussion-proof boot |
| Operating temperature | -4 to 122 oF / -20 to 50 oC |
| Humidity | 5% to 95% RH (non-condensing) |
| EMI/RFI | Complies with EMC Directive 89/336/EEC |
| Ingress Protection | IP65 |
| Battery run-time | 16-18 hours on two AA alkaline cells / 14-16 hours on two NiMH rechargeable cells |
| Size | 2.4 x 4 x 1.3 in. / 6 x 10 x 3.3 cm |
| Weight | 7.4 oz. / 211 g |
| Warranty | Full 2 year warranty including all sensors |
| Datalogger Options | User-downloadable datalogger |
| Data recorder | All events and occurrences |
| Sampling rate | Factory set at 5-second intervals and user-settable from 1 to 127-second intervals |
| Storage | 4.4 months of continuous data via 32 MB Flash MMC card (64 MB cards are also available); when full, the wraparound feature replaces oldest data with most recent data |