FD-1 filter paper smoke meter

Type filter paper smoke meter
Technical performance indicators
, air pump
The air pump volume is milliliters.
The sampling time of the air pump is .~.seconds.
The air tightness of the air pump: the amount of outside air infiltration does not exceed the air pumping capacity within one minute.
Sampling filter paper: B rapid qualitative chemical analysis filter paper is used, with an outer diameter of millimeters.
, instrument host
The minimum division of smoke is. The display shows the numerical value according to the absorbance, and uses ~. to express the smoke degree (unit waveh), which is the smoke degree of pure white filter paper and the smoke degree of completely black filter paper.
The error of the displayed value is not greater than 3 of the maximum reading.
Built-in power supply: nickel-cadmium battery pack.
Normal usage conditions of the instrument
Ambient temperature: ~℃
Relative humidity: <