Claims
- 1. A detector for fumes of hydrazine and its derivatives, methylhydrazine and 1,1-dimethylhydrazine comprising in combination:
- (i) a pellet of aluminum oxide impregnated with the catalyst material iridium, said iridium comprising from about 28 to about 36 percent by weight of said pellet for catalytically decomposing said fumes when said fumes make contact with said iridium of said impregnated pellet to cause heat to be generated in said pellet;
- (ii) thermally responsive thermistor means or thermocouple means embedded in said pellet responsive to said generated heat for providing an output signal proportional to said generated heat.
- 2. The detector of claim 1 in combination with a bridge circuit wherein said bridge circuit includes an unimpregnated pellet of like construction to that of said impregnated pellet except unimpregnated pellet does not contain iridium, said unimpregnated pellet functioning as a reference for balancing said bridge circuit in an atmosphere free of said fume prior to said detector being placed in service, said detector in said balanced bridge circuit after being exposed to said fumes causing an off-balance output signal which can be monitored for equating said signal to the amount of said fumes.
DEDICATORY CLAUSE
The invention described herein may be manufactured, used, and licensed by or for the Government for governmental purposes without the payment to us of any royalties thereon.
US Referenced Citations (12)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1006630 |
Aug 1957 |
DEX |