HI-Q - Model TFIA-4BC - 12/24 VDC - Fixed Speed Air Samplers - Brochure
The CF-18V field unit operates on a single 12 volt automotive battery (not included). The two stage centrifugal fan pump motor is speed controlled by a rheostat which allows an operator to set a desired volumetric flow rate. An In-Line venturi allows for instantaneous flow measurement directly from an individually calibrated Magnehelic®. ...