PRINCIPLE OF OPERATION The sensing tape is prepared by impregnating lead acetate and other essential components (both inert and active)into the paper tape. This formula, the treating process, and the ambient conditions are all critical to the success of the manufacturing process. After completion of this process, the sensing tape is installed in an appropriate analyzer.Sample gas containing trace quantities of H2S passes through a flow meter and a humidifier and then across the treated paper tape. When the H2S comes in contact with the lead acetate treated tape, lead sulfide is formed H2S+Pb+H2O=PbS. This reaction gradually darkens the tape according to H2S concentration. The resulting darkening is detected by photocells and is proportional to the H2S concentration. The electronics system can then provide a quantitative output according to the H2S level.
SPECIFICATIONS Dimensions: 1/2 inch x 100 feet 1/2 inch x 200 feet 1/2 inch x 300 feet Sensing Tape: Lead Acetate Impregnated Shelf Life: 8 years Minimum in Envelope and a cool, dry environment. Weight: Tape 2.5 oz., Cassette 5 oz. Packaging: MIL SPED Foil Envelope
IMPORTANT CARE INSTRUCTIONS Do not open envelope until ready to use tape Limit handling of tape Do not expose tape to liquids Do not breath dust from tape Dispose of tape properly after use Wash hands immediately after handling