Chapter 5: Using the Protector Filtered Hood
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Figure 5-2
The Modular Neutrodine Filtration Technology
Detecting a Breakthrough
Detecting a breakthrough of the lower primary filter is automatically completed
with a broad sensor, a target acid gas sensor, and a lab ambient air sensor.
Broad Sensor (Solvents)
The first sensor is based on a semi-conductor metal oxide sensing chip with
integrated heater. In the presence of detectable gas, sensor concentration
increases with electrical output signal which corresponds to the gas concentration.
The first sensor detects a large range of chemicals, such as solvents, but is not
sensitive to inorganic acids and some halogenated chemicals.
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