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Spectrum SP Series Portable Gas Detector with Integral Pump for Improved Monitoring Performance

 
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Spectrum-SP Series

larger image 		Gas detectors are designed for monitoring the environment by one of two methods, diffusion or sample draw. In the case of diffusion, natural forces are relied upon to cause the ambient air to interact with the gas sensor. As an alternative, the air sample can be drawn to the sensor using either a hand-operated, squeeze-bulb aspirator or a motorized sample pump. Obviously, the motorized pump is much more convenient and easier to use, and it can provide a continuous air sample to the sensor at a constant flow rate.

Sample draw reduces gas response time compared to natural diffusion, and it facilitates testing of valves, pipe connections, etc. for leaks, and enables the monitoring of remote areas or enclosed vessels where nonambient conditions may exist, such as, temperature extremes.

A properly designed sample draw system can improve the monitoring performance for most gases, particularly acid gases like Cl2 and HCl. It also reduces the response times for gases to be detected at sub-ppm concentrations, such as, AsH3. And, most important, sample draw is required for the detection of some gases, most notably, HF and O3. It is for these reasons that the SPECTRUM SP Series was developed.

Spectrum SP Series Literature

Spectrum SP Series Manual



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  Results 1 - 13 of 13 1 

P/N

Gas Detected

Range

LDL

Alarm 1

Alarm 2

04818-0100 Chlorine, Cl2 10.0 ppm 0.5 ppm 1 ppm 5 ppm
04818-0200 Hydrogen Sulfide, H2S 200 ppm 5 ppm 10 ppm 25 ppm
04818-0400 Hydrogen Chloride, HCl 20.0 ppm 1 ppm 5 ppm 10 ppm
04818-0500 Sulfur Dioxide, SO2 20.0 ppm 1 ppm 5 ppm 10 ppm
04818-0700 Hydrogen fluoride, HF 10.0 ppm 1 ppm 3 ppm 6 ppm
04818-0800 Ozone, O3 0.99 ppm 0.05 ppm 0.10 ppm 0.20 ppm
04818-1200 Carbon monoxide, CO 1000 ppm 5 ppm 35 ppm 200 ppm
04818-1500 Hydrogen, H2 1000 ppm 30 ppm 200 ppm 750 ppm
04818-1700 Nitrogen Dioxide, NO2 10.0 ppm 1.5 ppm 3 ppm 5 ppm
04818-1750 Nitric Oxide, NO 100 ppm 5 ppm 25 ppm 50 ppm
04818-2400 Ammonia, NH3 100 ppm 7 ppm 25 ppm 50 ppm
04818-4001 Arsine, AsH3 0.99 ppm 0.05 ppm 0.05 ppm 0.10 ppm
04818-4003 Silane, SiH4 30 ppm 4 ppm 5 ppm 10 ppm
  Results 1 - 13 of 13 1 
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