Overview
Enviro Testers Portable 4-Gas Monitor combines real-time detection of O₂, CO, H₂S, and combustible gases in one rugged instrument. It features clear backlit display of all four gases, user-settable high/low/TWA/STEL alarms, and audible + visual alerts. Powered by a 3.7 V lithium battery, it gives approximately 18 hours of continuous operation under room temperature in normal conditions, or about 12 hours when used with an external sampling pump. Compact (120.2 × 64.5 × 38.3 mm) and lightweight (~200 g), it is structured for portable field safety checks, confined space compliance, and proactive hazard detection. OEM customization available for branding, packaging, and alarm settings.
Features
- Simultaneous monitoring of four gases: O₂, CO, H₂S, and Combustible Gas (LEL)
- User-configurable alarm thresholds, including TWA & STEL exposure values
- Audible sound and visual LED alarms, up to 80 dB
- Rechargeable 3.7 V lithium battery with ~18 hours runtime
- Rugged, compact handheld size, approximately 120.2 × 64.5 × 38.3 mm and ~200 g weight
- Wide operating conditions: –10 °C to +50 °C, 15-95% RH (non-condensing)
Technical Specifications
| Specification | Details |
| Gas Types Detected | Oxygen (O₂), Carbon Monoxide (CO), Hydrogen Sulfide (H₂S), Combustible Gas (LEL) |
| Measuring Ranges | O₂: 0–30% Vol • CO: 0–999 ppm • H₂S: 0–500 ppm • LEL: 0–100% |
| Resolution | O₂: 0.1% • CO & H₂S: 1 ppm • Combustible: 1% |
| Alarm Types | Sound, Light (LED) |
| Alarm Sound Level | Approximately 80 dB |
| Measuring Principle | Electrochemical sensors for all gas types |
| Battery Type | Rechargeable lithium-ion (3.7 V) |
| Battery Runtime | ~18 hours (without pump); ~12 hours with external pump |
| Dimensions (L × W × H) | 120.2 × 64.5 × 38.3 mm |
| Weight | ~200 grams |
| Operating Temperature Range | -10 °C to +50 °C |
| Operating Humidity Range | 15% to 95% RH |
| Low / High Alarm Capability | Yes, user settable |
| TWA / STEL Alarm Support | Yes |
| Display Type | Backlit LCD showing all four gases simultaneously |
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