PEL means Permissible Exposure Limit, as defined by OSHA: “8-hour Time Weighted Average.” – An employee’s exposure to any substance, which shall not exceed the 8-hour Time Weighted Average given for that substance, during any 8-hour work shift of a 40-hour workweek.

IDLH means Immediately Dangerous to Life or Health: An atmospheric concentration of any toxic, corrosive or asphyxiate substance that poses an immediate threat to life or would cause irreversible or delayed adverse health effects or would interfere with an individual’s ability to escape from a dangerous atmosphere. IDLH values are based on effects that might occur as a consequence of a 30-minute exposure.

Specifications: The chemical sensor in the low pH (acid) cassette shows an easy to see color change. Half of the sensor window will change color as shown in the example below: Unexposed Exposed Description Concentration Reaction Time Hydrogen Chloride 25 ppm 3 min. Nitric Acid 12.5 ppm 4 min. Hydrogen Bromide 15 ppm 5 min. Interferences: The Low pH (Acid) cassette was exposed to saturated vapor concentrations of toluene, bleach, DEET, gasoline, diesel fuel and JP-8 jet fuel for one hour. No false positive or false negative readings were observed. Repeated immersion in a layer of oil/fuel on top of salt water had no effect on the performance of the Low pH (Acid) cassette. No other interferences are known. Morphix Technologies recommends using the High pH (base) cassette with the Low pH (acid) cassette to provide complete pH detection.