Model HD-29A

   The Model HD-29A is a mobile “K-Flow” lightweight, constant flow air sampler designed for use in facilities where the collection of precise air samples is required on a continuous or semi-continuous basis. Its vacuum pump and constant air flow regulator combination permits the collection of an air particulate sample at a constant flow rate until the ΔP across the filter paper exceeds the capability of the pump at that flow rate.

   The controlled flow rate is observed on the handle-mounted rotameter and is adjustable from 0.5 to 3.5 CFM. The Model HD-29A can be used with all 25mm, 37mm, 47mm and 2 inch diameter filters and charcoal cartridges used for the collection of airborne contaminants. An internal air filtering system has been installed between the regulator valve and the pump to prevent particulates from reaching the self-adjusting carbon vanes and causing excess wear.

   A resettable elapsed time meter is mounted on the instrument panel. By setting this timer to zero at the start of each sample period, an accurate sample volume may be readily calculated.

Model HD-29A Mobile Constant 
Flow Air Sampler

* CONSTANT AIRFLOW MAINTAINED WITH A ΔP ACROSS THE FILTER OF UP TO 17” OF MERCURY (FLOW RATE DEPENDENT)
* TELESCOPING SAMPLING GOOSE NECK 
* PERMITS EASY ADJUSTMENT TO BREATHING ZONE LEVELS
* ELAPSED TIME METER AND CONSTANT AIR FLOW RATE PERMITS CALCULATION OF ACCURATE SAMPLE VOLUME
* UNIT MOUNTED ON WHEELS FOR EASY MOVEMENT
* MOUNTED AIR FLOW INDICATOR
* MANUFACTURED UNDER RADECO QUALITY ASSURANCE PROGRAM
* ALL UNITS INDIVICUALLY CALIBRATED AND TRACEABLE TO NIST

Specifications

Air Flow Rate
* Adjustable from 0.5 to 3.5 CFM (10 to 100 LPM)
Dimensions/Weight
* 14” Long X 11” Wide X 4-7' High
* (36.6 cm X 27.9 cm X 1.2-2.1 m)
* 35 lbs (16kg)
Power Requirement/Cable
* 115V, 60Hz, 8 Amps
* 230V, 50Hz, 4 Amps
* Three wire cord; six feet; 10 Amp rating; UL and CSA approved. British and European available.
Air Flow Indicator
* Venturi mounted rotameter.
Air Mover/Motor
* Self-adjusting carbon vane type. Pump is designed for continuous operation at 26” Hg vacuum. 1/4 horsepower; thermal over load protection.
Vacuum Gages
* 0-30” Hg for reading ΔP
* 0-30” Hg for reading pump head
Input Connection
* 3/8” Female Quick Disconnect
Wheels
* Steel with 8” Rubber Tires
Resettable Elapsed Time Meter
* 9999 hours and 60 minutes, pushbutton resettable