Ozone Monitor – Lee Hung Scientific Pte Ltd https://www.leehung.com 4 Essential Science Laboratory Instruments For Your Chemistry La Fri, 28 Mar 2025 09:11:37 +0000 en-US hourly 1 https://www.leehung.com/wp-content/uploads/2021/03/apple-touch-icon-100x100.png Ozone Monitor – Lee Hung Scientific Pte Ltd https://www.leehung.com 32 32 Model 205 Dual Beam Ozone Monitor https://www.leehung.com/product/ozone-monitor-model-205/ Wed, 29 Mar 2023 08:00:55 +0000 https://www.leehung.com/product/ozone-monitor-model-205/ Dual-beam UV absorption at 254 nm with two detection cells to improve precision, baseline stability, and response time. Lightweight with low power consumption and a quiet, long-life internal air pump. For research and monitoring applications where high precision and fast responses required.

  • 0-250 ppm measurement range with 1.0 ppb precision
  • Dual beam for heightened precision and fast measurements
  • 2-second measurement frequency (fastest available on the market)
  • Approved by the EPA as a FEM: EQOA-0410-190

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]]> Measurement Principle UV Absorption at 254 nm; Dual Beam Federal Equivalent Method (FEM) Yes, 0-500 ppb for 10-40°C: EQOA-0410-190 Linear Dynamic Range 0 to 250 ppm Resolution 0.1 ppb Precision (1σ rms noise) Greater of 1.0 ppb or 2% of reading for 10-s average Accuracy Greater of 1.0 ppb or 2% of reading Limit of Detection (2σ) 2.0 ppb for 10-s average NIST-Traceable Calibration Yes Measurement Interval 2 s (Data averaging options: 10 s, 1 min, 5 min, 1 hr) Flow Rate (nominal) ~1.8 Liter/min Flow Rate Requirement >1.2 L/min Baseline Drift < 1 ppb/day
< 3 ppb/year Sensitivity Drift < 1%/day
< 3%/year Measurement Time, Frequency 2 s, 0.5 Hz Response Time, 100% of Step Change 4 s, 2 points Measurement and Averaging Times 2 s, 10 s, 1 min, 5 min, 1 hr Ozone Units ppb, pphm, ppm, µg m-3, mg m-3 Pressure Units mbar, torr Temperature Units °C, K T and P Corrected Yes Operating Temperature Range 0 to 50°C standard; optional -20 to 50°C with low temperature modifications (pump and lamp heater cold-weather package) Operating Altitude Range ~0-13.5 km (150-1,013 mbar) standard; optional ~0-25 km (30-1,013 mbar) with upgraded pressure sensor Power Requirement;
Supplied by battery or 110/220 VAC Power Pack 12 V dc or 120/240 V ac, nominally 650 mA at 12 V, ~8 watt (~7 watt with cell heater unplugged) Size 3.7H x 8.5W x 11.8L inches (9.5 x 21.5 x 30 cm) Weight 5.8 lb (2.6 kg); 3.1 lb (1.4 kg) without instrument case Internal Data Logger Capacity 16,383 lines (2-s fast measurement mode = 9.1 hr; 10 s avg. = 1.9 days;
1 min avg = 11 days; 5 min avg = 1.9 mo; 1 hr avg = 1.9 yr SD Card Logger Capacity > 2 GB (> 5-year capacity for 10-s averaging mode) Analog Inputs for Internal Logging of Other Instruments 3 Analog Inputs, 0-2.5 V; For example, could log external T, P, and RH Data Outputs RS232, 0-2.5 V Analog, LCD Display (Optional 4-20 mA Current; request quote) Data Transfer Baud Rates 2400, 4800, 19200 Output Ranges User-Defined Scaling Factor in Menu DewLine™ Yes Quiet, Long-Life Internal Air Pump Yes Flow Meter Yes Options Battery; External Particle Filter; Serial-to-USB Adapter; GPS (for 10-s data mode and above); Bluetooth; 4-20 mA Current Output; Cold-Weather Package, -20 to 50° C (pump, lamp heater); High-Altitude Upgrade 0-25 km (pressure sensor); Extra-Long-Life, Low-Temperature Internal Air Pump; Low-Power Option; Rack-Mount Case Configuration

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]]> Model 202 Ozone Monitor https://www.leehung.com/product/ozone-monitor-model-202/ Wed, 29 Mar 2023 08:00:54 +0000 https://www.leehung.com/product/ozone-monitor-model-202/ Features real-time ozone measurements produced every 10 seconds. Robust and versatile ozone monitor used for a variety of ambient ozone monitoring applications.

  • 0-250 ppm with 1.5 ppb precision
  • EPA-certified FEM (EQOA-0410-190)
  • Highly portable, low power, benchtop ozone monitor

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]]> Measurement Principle UV Absorption at 254 nm, single beam Federal Equivalent Method (FEM) Yes, 0-500 ppb for 10-40°C: EQOA-0410-190 Linear Dynamic Range 0 to 250 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 (in 10-s measurement mode) NIST-Traceable Calibration Yes Measurement Interval 10 s (Data averaging options: 1 min, 5 min, 1 hr) Flow Rate (nominal) ~1 Liter/min Flow Rate Requirement >0.6 L/min Baseline Drift < 2 ppb/day
< 5 ppb/year Sensitivity Drift < 1%/day
< 3%/year Measurement Time, Frequency 10 s, 0.1 Hz Response Time, 100% of Step Change 20 s, 2 points Averaging Times 1 min, 5 min, 1 hr Internal Data Logger Capacity 16,383 lines (10-s meas. = 1.9 days; 1-min avg = 11 days; 5-min avg = 1.9 mo;
1-hr avg = 1.9 yr) SD Card Logger Capacity Minimum 2 GB (> 5-year capacity for 10-s measurement mode) Ozone Units ppb, ppm, pphm, µg m-3, mg m-3 Pressure Units mbar, torr Temperature Units °C, K T and P Corrected Yes Operating Temperature Range 0 to 50 °C standard; optional -20 to 50 °C with low temperature modifications (pump and lamp heater cold-weather package) Operating Altitude Range ~0-13.5 km (150-1,013 mbar) standard; optional ~0-25 km (30-1,013 mbar) with upgraded pressure sensor Power Requirement;
Supplied by battery or 110/220 VAC Power Pack 11-14 V DC or 120/240 V AC, 600 mA, 7.2 watt (6.2 watt with cell heater unplugged) Size 3.7H x 8.5W x 11.8L inches (9.5 x 21.5 x 30 cm) Weight 5.5 lb (2.5 kg); 2.8 lb (1.3 kg) without instrument case Analog Inputs for Internal Logging of Other Instruments 3 Analog Inputs, 0-2.5 V; For example could log external T, P and RH Data Outputs RS232, 0-2.5 V Analog, LCD Display: (Optional 4-20 mA Analog Current output; request quote) Data Transfer Baud Rates 2400, 4800, 19200 Output Ranges User-Defined Scaling Factor in Menu DewLine™ Yes Quiet Long-Life Internal Air Pump Yes Flow Meter Yes Options Battery; External Particle Filter; Serial-to-USB Converter; GPS (for 10-s data mode and above); Bluetooth; 4-20 mA Current Output; Cold-Weather Package, -20 to 50°C (pump, lamp heater); High-Altitude Upgrade (25 km); Extra-Long-Life Internal Air Pump; Lower-Power Option; Rack-Mount Case Configuration Upgradable to Model 205 Dual Beam Yes

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]]> Model 106-L Ozone Monitor https://www.leehung.com/product/ozone-monitor-model-106-lmh/ Wed, 29 Mar 2023 08:00:54 +0000 https://www.leehung.com/product/ozone-monitor-model-106-lmh/ Measuring range of 0-20 ppm with 1.5 ppb precision

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]]> Versatile ambient Federal Equivalent Method (FEM) ozone monitor designed for both outdoor and industrial compliance monitoring applications. Ideal for industrial applications including: workplace exposure monitoring, fruit/vegetable cold storage, ozone disinfection, and many others.

The Model 106-L Ozone Monitor is designed for measurements of ozone concentrations ranging from low ppb levels up to 20 ppm (20,000 ppb). This highly accurate ozone monitor (1.5 ppb) has a low limit of detection (3.0 ppb for 10 second measurements) and is certified by the EPA as a FEM for monitoring for compliance with the US Clean Air Act:  EQOA-0914-218.

About the 106 Series:

  • Designed for industrial ozone applications to cover four different ozone concentration ranges by varying the optical path length.
  • Highly robust and easy to service; all components are mounted directly to the printed circuit board with few wire connection
  • Available in the three following configurations: Standard Enclosure, Industrial Enclosure, or with no enclosure (OEM version)
  • Industrial/NEMA Enclosure is available with single channel, three channel, or six channel sampling manifolds (106-H only available as single channel)

Features

  • UV absorption-based measurements, single beam
  • Low power consumption
  • Internal data logger with real-time clock
  • ​2-s measurement interval
  • On-board microprocessor with interactive menus includes data averaging options of 10 s, 1 m, 5 m, 1 hr, and user-defined adaptive filter
  • USB and RS-232 output of time/date, O3 concentration, internal temperature and pressure
  • Analog output (0-2.5 V and 4-20 mA) of ozone concentration in user-selected units and scaling factors
  • Two 2-level relays for control purposes (e.g., control of ozone source or turn warning light on and off); Four relays on Industrial enclosure models and in the 3-channel and 6-channel optional configurations
  • Long-life pump (15,000 hr)

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]]> Model 211 Scrubberless Ozone Monitor https://www.leehung.com/product/model-211-scrubberless-ozone-monitor/ Wed, 29 Mar 2023 08:00:33 +0000 https://www.leehung.com/product/ozone-monitor-model-211/ Dual beam ozone monitor FEM with a 30-cm pathlength. Patented gas-phase titration scrubber technology used in place of a solid-phase scrubber to minimize interferences. Ideal for ambient ozone monitoring in regions that are in non-attainment for ozone.

  • Dual beam, long path (30 cm) optical bench with high precision (< 0.5 ppb)
  • EPA Federal Equivalent Method (FEM) for compliance monitoring (EQOA–0514–215)
  • “Scrubberless” for interference-free measurement of ambient ozone

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]]> Measurement Principle UV Absorbance at 254 nm; Dual Beam Federal Equivalent Method (FEM) Yes, 0-500 ppb for 20-30°C: EQOA–0514–215 Ozone Scrubber Technology Gas-phase scrubber using NO, provided directly or by photolysis of N2O (supplied by either compressed gas cylinder or portable liquid N2O cartridge) Linear Dynamic Range 0-2,000 ppb (0-2 ppm) Resolution 0.1 ppb Precision (1σ rms noise) Greater of 0.5 ppb or 1% of reading for 10-s average Accuracy Greater of 1.0 ppb or 2% of reading Limit of Detection (2σ) 1.0 ppb for 10-s average NIST-Traceable Calibration Yes Flow Rate (nominal) ~2 Liter/min Flow Rate Requirement >1.2 L/min Baseline Drift < 1 ppb/day
< 3 ppb/year Sensitivity Drift < 0.5%/day
< 3%/year Response Time, 100% of Step Change 20 s for 10-s averaging; 4 s for 2-s measurement Measurement and Averaging Times 2 s, 10 s, 1 min, 5 min, 1 hr Internal Data Logger Capacity 16,383 lines (10-s avg. = 1.9 days; 1-min avg = 11 days; 5-min avg = 1.9 mo; 1-hr avg = 1.9 yr) SD Card Logger Capacity Minimum 2 GB (> 5-year capacity for 10-s measurement mode) Ozone Units ppb, ppm, pphm, µg m-3, mg m-3 Pressure Units mbar, torr Temperature Units °C, K T and P Corrected Yes Operating Temperature Range 10 to 50 °C Operating Altitude Range ~0-13.5 km (150-1,013 mbar) standard; optional ~0-25 km (30-1,013 mbar) with upgraded pressure sensor Power Requirement;
Supplied by Battery or 110/220 VAC Power Pack 11-14 V dc or 120/240 V ac, 1 A at 12 V, 12 watt Size Rackmount: 17″ w x 14.5″ d x 5.5″ h (43 x 37 x 14 cm) Weight 14.7 lb (6.7 kg) Data Outputs RS232, SD data card, LCD, 0-2.5 V Analog, optional 4-20 mA Analog Data Transfer Baud Rates 2400, 4800, 19200 Output Ranges User-Defined Scaling Factor in Menu DewLine™ Yes Long-Life Pump Yes, 20,000 hr Flow Meter Yes Options Battery; External Particle Filter; Bluetooth; External Serial-to-USB Adapter; 4-20 mA Current Output; Lamp Heater; High-Altitude Upgrade, ~0-25 km (pressure sensor)

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]]> Personal Ozone Monitor (POM) https://www.leehung.com/product/personal-ozone-monitor/ Wed, 29 Mar 2023 08:00:32 +0000 https://www.leehung.com/product/personal-ozone-monitor/ Handheld EPA-certified Federal Equivalent Method (FEM) ozone monitor that utilizes the measurement technique of UV absorption.

  • 0-10 ppm measurement range with 1.5 ppb precision
  • Handheld with battery and GPS
  • EPA designated as a Federal Equivalent Method (FEM) for ozone: EQOA–0815–227.

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]]> 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; Pelican-brand carrying case

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