Zefon Escort ELF Personal Air Sampling Pump

Date: 13/10/2017    View: 1122

Zefon Escort ELF Personal Air Sampling Pump  

Escort ELF air sampling pumps feature a state of the art electronic laminar flow sensor to provide a constant flow control with ± 2.5% regulation of flow rate (from 1-3 lpm) with automatic compensation for changes in battery voltage, temperature, altitude, and sample load. An internal secondary standard calibrates the pump continuously and needs to checked against a primary standard only once per month (or every 200 hours for coal mine dust sampling).


  • Patented electronic laminar flow control.
  • Internal secondary standard calibrates the pump continuously, maintaining OSHA compliance.
  • Check against a primary standard only once a month or every 200 hours for coal mine dust sampling.
  • Inlet filter traps moisture and particular matter.
  • Stainless steel-filled plastic case provides EMI/RFI protection.
  • Rated IP65 for resistance to water and dust ingress.
  • Exceptionally quiet operation.
  • Flow-Fault Indicator shows any sample inlet blockage.
  • Run/Hold feature allows “time out” during sampling process.
  • Elapsed time readout and low-battery warning.
  • Low flow and dual tube sampling available with Gemini Twin-Port Sampler.
  • 2 Year Warranty.


  • NIOSH certified for coal mine dust sampling (TC-74-030)
  • MSHA certified as intrinsically safe for underground use (Approval # 2G-3924-1).
  • UL approved as intrinsically safe for use in hazardous locations, Class I, Groups A, B, C, D; Class II, Groups E, F and G; Class III, Division I locations.
  • ATEX Approved models available. Contact Zefon or your Zefon distributor for details.

·         Specifications

Operating Flow Control

Volumetric flow rate held within ± 2.5% of set-point over the 1-to-3 lpm operating range (± 5% to 0.5 lpm), with automatic compensation for battery voltage, altitude, temperature and sample load changes.

Flow Rate

Flow rate adjustable between 0.5 and 3 lpm; lower flow rates attainable (to 1 mlpm) with optional Gemini Twin-Port Sampling accessory.

Flow Indication

Liquid Crystal Display provides 0.01 lpm resolution.

Operating Range

30 inches of water load up to 2 lpm and 10 inches up to 3 lpm.

Flow Blockage Detection

Flow-Fault LED comes on immediately when block is detected. Pump shuts down within 90 seconds if block is not cleared.

Elapsed Time Readout

To 999 minutes in increments of 1 minute. Holds the last reading after either fl ow blockage or low battery shutdown and when pump is off or in hold mode.

Operating Time

Varies with flow rate and sampling device loading.

Operating Temperature Limits

32°-113°F (0°-45°C)

Physical Weight

23 oz. (652 gm), with battery pack.


2.25” D x 4.25” H x 4” W
(5.7 cm x 10.8 cm x 10.2 cm), with battery pack.

Power Supply

4.8-volt battery pack of four NiMH cells. (Units Mfg before Oct 2011 contain NiCd cells) 

Battery Pack Capacity

2.8 amp hours (NiMH version), 2.4 amp hours (NiCD version)

Battery Pack Recharge Time

14-16 hours (overnight) with Omega™ Charger.

Typical Battery Pack Life

300 or more charging cycles


Related News
Silver Membrane Filters
Silver Membrane Filters (12/10/2017)
Silver metal membranes are used in a variety of filtration applications, and their ability to withstand extreme chemical and thermal stress makes them ideal for applications involving aggressive fluids and/or high temperatures
Top News
Hormone DHT causes increased hair loss men vulnerable.

Hormone DHT causes increase...

(24/04/2014)  View:3462
"Culprit" causing the top 95% of all cases of hair loss in m...
The cancer risk from chopsticks

The cancer risk from chopst...

(24/04/2014)  View:3290
Currently on the market, chopsticks are diverse both in term...
More than 400 health care price increases, lower than initially proposed

More than 400 health care p...

(24/04/2014)  View:3241
Price will raise a checkup from 3,000 to 20,000 maximum (lea...
Yogurt 'energy' to digest

Yogurt 'energy' to digest

(24/04/2014)  View:3211
With a series of benefits such as increased Lactase, Lactose...
These factors increase the likelihood of male infertility

These factors increase the ...

(24/04/2014)  View:3019
"Children are a godsend fortune" but many couples still do n...
Online support