Meets OSHA Accuracy Requirments Computes Time Weighted Average Displays Short Term Exposure Limit Battery status LED Data Logging Available.

Environmental Sensor Co.’s Ethylene Oxide Meter is a hand held instrument that measures ethylene oxide concentration with a range of 0-20 ppm and a resolution of 0.1 ppm. The instrument has an LCD display giving concentrations in ppm every 10 seconds. The internal micro-controller computes a 15-minute average (STEL) and an hourly average, up to 8 hours (TWA). The meter also features a low battery indicator and an audible alarm that can be set at any level in range of the sensor.

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The sensing element of the instrument is an electro-chemical cell. The cell is a four-electrode type, which contains a working and an active auxiliary electrode. The signal from the auxiliary electrode is used for temperature compensation. This improves the selectivity of the entire sensor. The sensor's response is linear with the concentration of ethylene oxide in air.

PERFORMANCE DATA
Sensor Nominal Range Maximum PPM Resolution Temperature Range Pressure Range Response Time       (90% Peak) Relative Humidity Range Max. Zero Shift w/ Temp.       Change of(0°C to +40°C) Long Term Output Drift Repeatability Alarm Dimensions (HxDxW) Weight Power Source Battery Life Sensor Life	Electro chemical 0-20 ppm 100 ppm 0.1 ppm -20°C to 50°C Atmospheric ±10% <140 Seconds 15-90% Non Condensing 2 ppm <5% signal loss/year 1% of signal Audible, 80db at 10 cm 4.75"x2.5"x1.5" 170 gms 9-V Alkaline Battery 240 hours 2+ years

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Interfering substances are given below as a percent of ETO. This represents the amount of reaction to be expected from a given concentration of a particular chemical.