Bacharach Hi-Flow Sampler

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Bacharach Hi-Flow Sampler

High Flow Samplers capture all of the emissions from a leaking component to accurately quantify leak emissions rates. Leak emissions, plus a large volume sample of the air around the leaking component, are pulled into the instrument through a vacuum sampling hose.

High volume samplers are equipped with dual hydrocarbon detectors that measure the concentration of hydrocarbon gas in the captured sample, as well as the ambient hydrocarbon gas concentration. Sample measurements are corrected for the ambient hydrocarbon concentration, and a mass leak rate is calculated by multiplying the flow rate of the measured sample by the difference between the ambient gas concentration and the gas concentration in the measured sample. High volume samplers are equipped with special attachments designed to ensure complete emissions capture and to prevent interference from other nearby emissions sources. High volume samplers measure leak rates up to 8 standard cubic feet per minute (scfm), a rate equivalent to 11.5 thousand cubic feet per day (Mcfd). Leak rates greater than 8 scfm must be measured using bagging techniques or flow meters. A single operator can measure as many as thirty components in an hour using a high volume sampler, compared with two to three measurements per hour using traditional techniques.

This equipment is best suited to detect gas leakage around:

  • Various pipefittings
  • Valve packings
  • Compressor seals

Found in:
Gas Transmission, Gas Storage, Gas Processing & Compressor Facilities


Operating Temperature 0 to 50 °C (32 to 122 °F)
Storage Temperature –40 to 60 °C (–40 to 140 °F)
Humidity 5 to 95% RH (non-condensing)
Sampling Flow Rate Maximum 10.5 SCFM (297 LPM) at full battery charge
Accuracy ±5% of reading
Natural Gas Sensor
Detection Method Catalytic oxidation / Thermal conductivity
Detection Range
Catalytic Oxidation 0 to 5% by volume methane
Thermal conductivity 5 to 100% by volume methane
Accuracy ±5% of reading or 0.02 % methane, whichever is greater
Type Intrinsically Safe NiMH rechargeable pack
Dimensions 18L x 12W x 7H inches (457 x 305 x178 mm)
Weight 20 lbs (9.07 kg)

Agency Approvals

  • Designed to be intrinsically safe for use in hazardous locations
  • Class I, Division 1, Groups A, B, C & D in North America
  • CAN/CSA-C22.2 No. 157 – (June 1992)
  • ANSI (June 27, 2002)/UL913-2002
  • Intrinsically Safe Apparatus and Associated Apparatus for use in Class I, Division 1, Hazardous (Classified) Locations

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