TJ Environmental is a retail business providing quality products and support to environmental laboratories and testing professionals. We offer filters and testing equipment for liquid and areosol monitoring (such as HotBlock, ghost wipes, BOD bottles, TCLP products, metals analysis products, ProWeigh filters, MaxFil, ZHE+, Digestion Vessels, flow meters, acetone vaporizers, and various filters for water and air testing) at very competitive prices.  We currently stock products by BGI, Environmental Express, J.D. Technical Services, Menzel, SPI Supplies and Technovation. Most orders received before 3 pm can be shipped to you from our office the same day that you place your order. That means no uncertain waiting time and delays, as with many suppliers. HotBlocks, BOD bottles and vessels, Microscope slides, gold filters

Zefon Escort ELF Personal Air Sampling Pump

Zefon Escort ELF Personal Air Sampling Pump Escort® ELF Sampling Pump
  • Patented electronic laminar flow control.
  • Internal secondary standard calibrates the pump continuously for compliance with OSHA 3058.
  • 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 IP66 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.
Competitive Advantages
  • Patented “Laminar Flow” control permits the best accuracy in the business
  • Requires calibration only once per month or once every 200 hours for MSHA applications.
  • “Key Pad” design allows adjustment of flow rates without tools or a potentiometer.
  • Lightweight – only 23 ounces.
  • Very durable design.
  • Extremely easy to use.
  • Resolution display is .1 lpm in standard mode, .01 lpm in calibration mode.
  • 3 gaskets provide superior protection against water and dust ingress.
  • Tamper-resistant door restricts access to adjustment keys.
  • Designed for use with many different sampling accessories.

Escort ELF 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 flow 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 nickel metal hydride cells.

Battery Pack Capacity
2.8 amp hours

Battery Pack Recharge Time
14-16 hours (overnight) with OmegaTM Charger.

Typical Battery Pack Life
300 or more charging cycles