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Meets OSHA Accuracy Requirments Computes Time Weighted Average Display's Short Term Exposure Limit Battery status LED Data Logging Available

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The Z-800 Ammonia Meter is a direct reading, hand held instrument, which measures ammonia vapor in air with a range of 0-50 ppm, with a resolution of 0.1 ppm. The instrument features an LCD display, a low battery indicator, and an audible alarm that can be set at any level, within range of the sensor. The LCD display outputs the current ammonia concentration (in ppm) every ten seconds. Peak, STEL (15 minute average), and TWA (an 8 hour average) values can also be viewed at any time.

With the optional data logging feature, the meter stores all of the exposure points for each use (up to 5 measurements). There is a corresponding date and time stamp for each series of exposure points. All of the memory contents can be easily uploaded to PC using the terminal software included with the instrument or components available within Microsoft Windows.

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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 and to improve the selectivity of the entire sensor. The sensor response is linear with the concentration of ammonia in air.

PERFORMANCE DATA
Sensor Nominal Range Maximum Range Resolution Temperature Range Max. Zero Shift w/ Temp.       Change of(0°C to +40°C) Pressure Range Response Time Relative Humidity Range Long Term Output Drift Alarm Dimensions (HxDxW) Weight Power Source Battery Life Sensor Life	Electrochemical 0 -50 ppm 200 ppm 1 ppm -20°C to 50°C 5 ppm Atmospheric ±10% <150 Seconds 15-90% Non Condensing <4% signal loss/year 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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This sensor may respond to certain gases in addition to ammonia.  This table shows the typical response expected when the meter is exposed to a given gas concentration.  Care needs to be exercised about using this instrument in the presence of large concentrations of interfering gases.  Contact the manufacturer if difficulties are suspected with interfering gases or with other potential usage problems.