COMPUR TRACER便攜式有毒氣體泄漏檢測儀
ppb級氣體泄漏檢測
COMPUR TRACER特點(diǎn)：
ppb級毒氣檢漏，靈敏度高;
可自動清零;
取樣裝置前配過濾裝置，防水防塵;
兩個檢測范圍可選;
蜂鳴報警;
不顯示數(shù)量單位，顯示對比值。
COMPUR TRACER應(yīng)用：靈敏度高，適用于光氣等化工廠車間
COMPUR TRACER可測氣體：ClO2,COCl2,Cl2,HCl,HCN,H2S,NO2
傳感器技術(shù)：電化學(xué)傳感器
光氣zui低可測至2ppb.
顯示：LED顯示
夜晚使用，可打開背光燈。
備件如傳感器，過濾器或取樣電極無需工具即可替換。
The Tracer has its strength where other methods of leak detection would fail because of their cross sensitivities to other gases. Such selectivity is requested in plants using or producing extremely toxic substances. These plants always have a „Zero Emission Policy“ in force. Here high sensitivity in combination with good selectivity is required.
Sensor technology
Electrochemical sensors can be designed to be very selectivesensitive at the same time by the right material choice for electrodeselectrolyte. These sensors will not respond to less dangerous substances that might be around in the plant such as hydrocarbons, carbon monoxide, hydrogen or even humidity. A detection limit of Phosgene as low as 2 ppb is no problem for this sensor technology!
A disadvantage of electrochemical sensors compared to physical methods has been their comparatively slow response. The working electrode must transform analyte to confer a response –this takes its time.
Tests in Compur`s laboratories have shown that the material transformation process at the working electrode can be speeded up by increased mass transfer of analyte to sensing surface compared to gas access by diffusion. It was a short step from there to develop an instrument with a built-in pumpa special measuring chamber with optimized flow characteristics. In this way the response time of the instrument is almost as short as would be obtained with a physical detection method.
The Tracer is capable to detect even traces of toxic gases. The detection limit is in the low ppb range depending on the substance to be detected. As a leak detector might be exposed to very high concentrations, it must not be used as a personal monitor. To avoid it being abused as such, it displays no concentration, but only a dimensionless figure or a bar graph.
Using the Tracer
To locate a leak, move the sample intake along the surface to be inspected. The measured value will increase when a leak is approached. The display can be selected between bar graphdigital. A control toneLED will increase in frequency with mounting measured value similar to a Geiger counter.
The Tracer will protect itself from poisoning. If the measured value goes out of range the pump will go offstart again when it drops below 95% of the range.
The graphic display is easy to read. At night or in dark places in the plant a backlight can be switched on.
Consumables such as sensor, filter or sampling probe can easily be replaced without tools.
Field test results – the high range version
The first tests in plants have proven that an ultra-low measuring range does not always do the job. Therefore the Tracer product range is completed by a new HIGH range version. It uses an orifice in front of the sensor increasing the measuring range by a factor of 20. The user can do that without changing the amplifier adjustment. All it takes is just replacing the LOW range sensor by a HIGH range sensorso cover a measuring range from the low ppb range up to the two digit ppm level!
北京中西遠(yuǎn)大科技有限公司
:陳
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傳真:
:zhouziyi@midwest.com.cn
www.zxqc.cn/zxqc
www.midwest.com.cn
www.62965544.com
