108-L Ozone Monitor
The Model 108-L Ozone Monitor is a compact, high-performance ozone analyzer designed for accurate and reliable ambient ozone measurements in both regulatory and industrial environments. Certified by the EPA as a Federal Equivalent Method (FEM), this UV-based ozone monitor provides precise readings from low ppb levels up to 20 ppm, making it ideal for air quality monitoring, personal exposure assessments, and ozone control in disinfection systems. With its ultra-low power consumption (≈2 watts), lightweight design, and minimal maintenance requirements, the 108-L seamlessly integrates into existing systems or can operate as a standalone device. Featuring analog (0–2.5 V, 4–20 mA) and RS232 digital outputs, plus a fast 2-second response time, the 108-L ensures real-time, actionable ozone data across a wide range of applications. Its small footprint and flexible configuration options (OEM, enclosure with pump, or AQLite package) make it a top choice for modern environmental and industrial monitoring challenges.
- Measurement Range: 0–20 ppm
- Accuracy/Precision: ±1.5 ppb
- Response Time: 4 seconds (2-second measurement interval)
- Measurement Principle: UV absorption-based
- Low Power Consumption: ≈ 2.0 watts
- Compact & Lightweight: ~2.0 lb (0.89 kg)
- Relay Outputs: 2 user-settable thresholds
- Analog Outputs: 0–2.5 V and 4–20 mA
- Digital Output: RS232 communication
- Minimal Maintenance
- OEM, Pump Enclosure, and AQLite Air Monitoring configurations available
- EPA Certified FEM: EQOA-0914-218
- Integration into air quality monitoring systems (e.g., AQMesh, microclimate networks)
- Replacement for less reliable HMOS or electrochemical ozone sensors
- Personal exposure monitoring in workplaces
- Ozone monitoring/control in food, medical, or industrial disinfection systems
- Remote long-term ozone monitoring in low-power locations
- Compliance monitoring under the Clean Air Act
| Parameter | Specification |
|---|---|
| Measurement Principle | UV Absorption at 254 nm, single beam |
| Certifications | Federal Equivalent Method (FEM), modification to EQOA-0914-218; CE |
| Linear Dynamic Range | 0–20,000 ppb (0–20 ppm) |
| Resolution | 0.1 ppb |
| Precision | Greater of 1.5 ppb or 2% of Reading (1σ for 10-s average; rms noise) |
| Limit of Detection | 3.0 ppb (10-s average, 2σ) |
| Accuracy | Greater of 1.5 ppb or 2% of Reading |
| Calibration | NIST Traceable; annual calibration recommended |
| Measurement Time / Frequency | 2 s, 0.5 Hz |
| Data Averaging Options | 10 s, 1 min, 5 min, 1 hr |
| Response Time (100% of Step Change) | 2-s output: 4 s (2 data points) 10-s output: 20 s (2 data points) |
| Adaptive Filter | Available, user-specified parameters |
| Data Transfer Baud Rate | 2400 |
| Ozone Units | ppb, pphm, ppm, µg/m³, mg/m³ |
| Temperature Units | °C, °F, K |
| Pressure Units | mbar, torr, psi |
| T and P Corrected | Yes |
| DewLine™ for Humidity Control | Yes |
| Operating Temperature Range | 0 to 50 °C (0 to 40 °C for FEM) |
| Flow Rate | Minimum: 0.6 L/min Nominal: 1 L/min Maximum: 1.5 L/min |
| Data Outputs | RS232; 0–2.5 V, 4–20 mA |
| Power Requirements | 11–16 V DC, nominally 165 mA at 12 V DC, 2 W |
| Relay with 2 Setpoints | Yes, responds based on user’s ozone set points |
| Size (L × W × H) | 22 × 10 × 7.6 cm (8.7 × 4.0 × 3.0 in) |
| Weight | 0.89 kg (2.0 lb) |
| Options | Pump, Enclosure, AQLite packages |
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