

Oxygen and toxic gas detection with smart diagnostics
Omniguard® model 2100 Oxygen & Toxic Gas Detector
The Omniguard model 2100 gas detector detects and measures oxygen and toxic gases in industrial applications such as refineries, drilling and production platforms, gas turbines, chemical plants, fuel loading facilities, compressor stations, wastewater treatment facilities, LNG/LPG processing and storage facilities, transportation facilities, and manufacturing processes.
- Oxygen and toxic gas detection
- Wide range of detectable gases
- HART rev 7 communication
- Advanced self-test and diagnostics
- 4-20 mA output signal
Specifications
Key gas detection and installation specifications for Model 2100
General specifications
| Measuring type | Diffusion. |
| Measuring method | Electrochemical cell or semiconductor cell. |
| Detectable gases | O2 and toxic gases including CO, Cl2, NH3, and H2S. |
| Measuring range | Depending on gas. |
| Accuracy | +/-3% full range. |
Performance
| Oxygen response time | Typical 90% of range in less than 15 seconds. |
| Toxic gas response time | CO, Cl2, NH3, and H2S typical 90% of range in less than 45 seconds, depending on sensor. |
| Zero drift | +/-2% full range. |
Electrical
| Input voltage | 18-31 VDC, nominal 24 VDC, ripple voltage less than 1 V. |
| Power consumption | Max. wattage 3.6 W at 24 VDC; max. current 150 mA at 24 VDC. |
| Interfaces | Analog 4-20 mA current interface and HART rev 7. |
Operating limits
| Operating temperature | Transmitter -40C to +80C. |
| Operating humidity | 5-99% RH non-condensing. |
| Pressure | 90-110 kPa. |
| Max air velocity | 6 m/s. |
Mechanical
| Dimensions (H x W x D) | 136 x 166 x 110 mm. |
| Weight | 1.8 kg aluminum; 4.0 kg stainless steel. |
| Conduit entry | 3/4-14 NPT or M20-1.5. |
| Housing materials | Aluminum or stainless steel. |
Configuration
| Model | 2100 |
| Product type | Oxygen & toxic gas detector |
| Product type definition | Gas Detectors (gas) |
| Ordering format | [MODEL]-X X X X X X X |
| Housing material/conduit entry | 0 – Aluminium, 3/4-14 NPT (white); 1 – Stainless steel, 3/4-14 NPT; 2 – Aluminium, M20x1.5 (white); 3 – Stainless steel, M20x1.5 |
| Detectable gas | 0 – O2 (Oxygen); 1 – CO (Carbon monoxide); 2 – Cl2 (Chlorine); 3 – NH3 (Ammonia); 4 – H2S (Hydrogen sulfide); 9 – Other, please specify |
| Measuring method | 0 – Electrochemical cell; 1 – Semiconductor cell |
| Measuring range | 0 – 0-3 ppm (Cl2); 1 – 0-30 ppm (H2S); 2 – 0-75 ppm (NH3); 3 – 0-150 ppm (CO); 4 – 0-300 ppm (CO); 5 – 0-25% Vol (O2); 9 – Other, please specify |
| Output signal | 0 – 4-20 mA, and HART rev 7 |
| Configuration | 0 – Standard; 1 – Remote option |
| Approvals | 0 – IECEx, ATEX, UL, SIL2, CE |
Why Model 2100
Model 2100 product highlights
Oxygen and toxic gases
Detects oxygen and toxic gases including CO, Cl2, NH3, H2S, and other specified gases.
Proven sensor technology
Built on established sensor technology for fast response, measuring accuracy, and long-term stability.
HART communication
Standard HART rev 7 communication supports setup, integration, and diagnostics.
Advanced diagnostics
Self-test and diagnostic features support reliable field operation.
Smart calibration
Microprocessor-controlled functionality and simple calibration make operation and maintenance straightforward.
4-20 mA output
Standard analog output supports quick installation and operation.
Rugged enclosure
Weather- and flame-proof enclosure supports indoor and outdoor industrial environments.
Low ownership cost
Designed for dependable operation with accessible field maintenance.
Approvals
Approved for hazardous-area use, including IECEx, ATEX, UL, SIL2, and CE.
Accessories
Mounting, shields, and add-ons to fit your installation environment.
Applications
Typical installation environments for Model 2100
Ready to configure Model 2100?
Use the configurator to choose the right version and options for your site, then request a quote.




















