Various sensor products

NSU-131A, NSU-131AF

NSU-131A and 131AF are ready-for-use units with Nemotofs hot-wire type gas sensors already calibrated. Outputs are obtained in mV order when the rated DC voltage is supplied to the units. The alarm concentration is preset at 10% of LEL of natural gas or hydrogen gas, but custom calibration is available upon request.

Ratings

items NSU-131A NSU-131AF
Supply voltage DC 2.5}0.1V DC 2.5}0.1V
Current when rated voltage is supplied DC150 ~ 170mA DC150 ~ 170mA
Ambient temperature Usage |20@~@+80Ž @Storage |20@~@+70Ž
Ambient humidity Usage <95“RH, Storage <95“RH (without dew condensation)

Standard specifications

Items NSU-131A NSU-131AF
Delay at initially energized 90 Seconds
Response speed 90% response within 30 seconds
Calibrated Alarm concentration 10 } 1% LELAMethane 4,500 ~ 5,500ppm,
Hydrogen 3,600 ~ 4,400ppm
Calibration range 5 ~ 25% LEL
Output in clean air -23 ~ -29mV -18 ~ -22mV



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