For 35+ years A. P. BUCK, INC. has manufactured the most advanced and innovative instruments for indoor air sampling.We supply air sampling pumps and calibrators for industrial hygiene, indoor air quality, occupational health, environmental, health physics and safety disciplines. For more information on our product lines just click on the link that interests you.


Improved Libra Plus LP-5 220V Pump Kit
Item Item Details
(Price is for domestic US market only)
Improved Libra Plus LP-5 220V Pump Kit
Item Name:
Improved Libra Plus LP-5 220V Pump Kit
Item #:

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Flow Range

800 to 6000 cc/min in Constant Flow Control

5 to 800 cc/min in Constant Pressure Control* 

*with Universal Low Flow Holder,  P.N. APB-109030

Increased Backpressure Capability, up to 50" of w.c @2LPM.

This Personal Air Sampler consists of a pump contained in a high impact RFI/EMI shielded case, exclusive electronic circuit board (patent pending) for constant flow control, an LCD display with 2 lines of 16 characters, a single diaphragm pump mechanism and a rechargeable nickel metal hydride battery pack.

The purpose of the Libra Plus air sampling pump is to draw air contaminants in through a sampling media such as 25 and 37mm filter cassettes, bubble impingers, long-duration color detector tubes; to gauge personnel exposure to gases, vapors, particulates, aerosols, etc. No tools are required to operate this pump and Keys lock to prevent it from being turned off. The Main display allows quick selection to RUN (for sampling) or MENU (to reset pumps data).

Other features of the Libra Plus include elapsed time, flow rate and accumulated volume. The built in timer count down the sampling time and automatically turn off the pump. All data is saved and cleared for next sample under the MENU “Clear All Data” option.

Now includes Standard Smart NiMH charger at no additional cosst. This charger will charge the pump battery (APB-109029) in approx. 2.5hrs.


  • Runs 30 hours @ 2.0 LPM (37 mm 0.8u filter)
  • Up to 50" of w.c. back pressure capability at 2LPM.
  • Accuracy 5% of display reading or pump Flow Faults
  •  “Auto-restart” within one minute of a Flow Fault
  • Displays: elapsed time, accumulated volume and flow rate
  • Flows up to 6 LPM for special cyclone requirements
  • Universal Low Flow Holder for flow 5 to 800 cc/m with tubes
  • High back pressure for 25mm 0.45 u asbestos filters
  • Flow Compensation for filter plugging and battery voltage
  • Dual flow range handles impingers, cyclones, tubes
  • Count down timer up to 40 hours, turns off pump
  • Includes Standard Smart charger with USB Mini B plug
  • Optionnal extended run triple packs for three times the run
  • Battery pack rechargeable while attached or separately
  • Compact, rugged and quiet
  • Stainless steel belt clip with built-in tripod connector
  • Key pad lock system
  • One year warranty

    Click here to Download Technical Literature


Money Orders and personal Checks also Accepted, choose Pay By Mail during checkout!

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