POM™, Personal Ozone Monitor™
The World's Smallest Ozone Monitor
EPA Federal Equivalent Method (FEM)
2B Tech has taken the next step in miniaturization of UV-based ozone monitors by developing the Personal Ozone Monitor or "POM". The basic POM unit has dimensions of 4 x 3 x 1.5 inches and weighs only 0.8 lb / 1.0 lb without/with battery (360 g / 450 g ). It has a built-in GPS so that ozone measurements may be logged continuously along with geographic location. By folding the optical path in the shape of a "U," it was possible to achieve the same path length in the POM as in the Models 202, 205, and 106-L and thus have similar precision and accuracy (~1.5 ppb).
The POM has been designated by the US EPA as a Federal Equivalent Method (FEM) for ozone: EQOA–0815–227.
Read our paper on the POM, published in Analytical Chemistry: Miniature Personal Ozone Monitor Based on UV Absorbance, P.C. Andersen, C.J. Williford and J.W. Birks, Analytical Chemistry 82, 7924-7928 (2010).
Features
- Small (palm-sized)
- Lightweight (~1 lb)
- Same measurement principle (UV absorbance) and similar precision (~1.5 ppb) as much larger instruments
- Approved as a Federal Equivalent Method (FEM) (EQOA-0815-227)
- Measure ozone up to 10,000 ppb (10 ppm)
- Belt clip and compact lithium-ion battery pack in side bracket for extreme portability
- Adapters enable AC or 12V battery operation
- Low power requirement: 3 watt
- Internal data logger
- Built-in GPS logs location along with ozone measurements
- Fast 2-s or 10-s measurements
- User-selected averaging times of 1 min, 5 min, or 1 hr
- Serial or USB connections for data downloading
Applications
- Personal exposure monitoring for studies of health effects of air pollutants
- Health and safety monitoring at industrial sites using ozone
- Vertical profiling using balloons, kites, RPVs, and light aircraft where space and weight are highly limited
- Long-term monitoring at remote locations where power is highly limited
- Urban arrays of ground-based detectors
Application Note
This note describes a study in which the POM was flown on a drone above Chesapeake Bay, to investigate the chemistry inside the plume of a large freighter at sea. The versatility of the POM was showcased in this work, which also made use of another POM to make complementary measurements at a ground station nearby.
Specifications
| Measurement Principle | UV Absorption at 254 nm |
| Federal Equivalent Method (FEM) | Yes, EQOA–0815–227 |
| Linear Dynamic Range | 0 ppb to 10 ppm |
| Resolution | 0.1 ppb |
| Precision (1σ rms noise) | Greater of 1.5 ppb or 2% of reading |
| Accuracy | Greater of 1.5 ppb or 2% of reading |
| Limit of Detection (2σ) | 3.0 ppb (10-s measurement mode, with default adaptive filter settings) |
| NIST-Traceable Calibration | Yes |
| Measurement Intervals | Measurement mode: 10 s (Fast mode: 2 s) |
| Flow Rate (nominal) | ~0.8 Liter/min |
| Flow Rate Requirement | >0.5 L/min |
| Baseline Drift | < 2 ppb/day < 5 ppb/year |
| Sensitivity Drift | < 1%/day < 3%/year |
| Measurement Time, Frequency | 10 s, 0.1 Hz (Fast mode: 2 s, 0.5 Hz) |
| Response Time, 100% of Step Change | For 10-s output: 20 s, 2 points (For 2-s output: 4 s, 2 points) |
| Averaging Times | 1 min, 5 min, 1 hr |
| Data Storage | 8,192 lines (2-s fast mode ~4.6 hr; 10-s meas. mode ~1 day; 1-min avg ~6 days; 5-min avg ~1 mo; 1-hr avg ~1 yr) |
| Ozone Units | ppb |
| Pressure Units | torr |
| Temperature Units | K |
| T and P Corrected | Yes |
| Operating Temperature Range | 0 to 50 °C |
| Operating Altitude/Pressure Ranges | ~0-13.5 km (150-1,013 mbar) [modifications for higher altitudes available as an option] |
| Power Requirement; Supplied by battery or 110/220 VAC Power Pack |
7-12 V dc, nominally 250 mA at 12 V, 3.0 watt |
| External Battery | 7.4 Volt, 1.6 amp hour, Lithium Ion Battery, 5-8 hr |
| Size | without GPS and battery: 4.0 x 3.0 x 1.5 inches (10.2 x 7.6 x 3.8 cm) add GPS: 5.0 x 3.0 x 1.5 in (12.7 x 7.6 x 3.8 cm) |
| Weight | without battery: 0.8 lb (0.36 kg) with battery: 1.0 lb (0.45 kg) |
| Data Transfer Baud Rate | 19200 |
| DewLine™ | Yes |
| GPS | Yes |
| Options | Analog output; wall-mount bracket; modifications for higher altitude operation |
System Includes
- POM™ Personal Ozone Monitor™
- AC Power Adapter (100-240 VAC to 12 VDC) with Country-Specific Plug
- 7.4 V Lithium Ion Battery
- Battery Charger
- Serial Port Cable
- USB Cable
- Zeroing Cartridge
- Global Positioning System (GPS)
- USB stick with Operation Manual, 2B Display Software and USB Driver
- Instrument Birth Certificate
- Calibration Data and NIST-Traceable Calibration Certificate
- One-Year Warranty
Confused about which ozone monitor best suits your application?
Our Tech Note #001 compares the specifications of our Models 106-L, 202, 205, 211 and POM with other high precision ozone monitors (Thermo, Teledyne-API and Ecotech).
- Decision Tree: This will help you decide which ozone monitor is best for your application.
- Comparison: See a table that compares the specifications of all of our ozone monitors.
- Applications: The most suitable ozone monitors for different applications are discussed here.
Our Tech Note #001 compares the specifications of our Models 106-L, 202, 205, 211 and POM with other high precision ozone monitors (Thermo, Teledyne-API and Ecotech).