Product Overview
Inline Lab Impex EFM Flow Meter with a Factory Thermistor Data Plate
Condition
Used and in good cosmetic shape; shows signs of normal use, including scuffs, scratches, and minor wear. In the photos the black finned enclosure and its folded mounting bracket are clean, with light handling marks and no dents or cracks. The machined flow block underneath shows faint surface scuffing around the two hose barb fittings, and the barbs themselves are bright with no thread damage visible. The Lab Impex Systems nameplate is intact and fully legible: Type EFM, S. No. B0273/0010, England BH17 0GE. A second printed plate on the flow block reads Thermistor Data, with Rl 4.057 kOhm, Rm 1.071 kOhm, and Rh 0.345 kOhm. The bracket flange carries a hand-lettered silver marker number beginning QA1568; the trailing characters are not legible in the photos. One unit available, exactly as shown. No cable, mating connector, power supply, or documentation is included, and we have not confirmed electrical function.
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Product Overview
This is a Lab Impex Systems Type EFM flow meter assembly, serial number B0273/0010, built in England. The unit photographed is the compact inline configuration: a machined metal flow block with a hose barb fitting at each end, bolted under a black finned extruded enclosure that holds the electronics, all carried on a folded plate with slotted mounting holes on both sides. A circular threaded multi-pin connector on one end of the enclosure is the only electrical interface; there is no display, keypad, or terminal strip on this unit. The flow block wears a factory-printed Thermistor Data plate listing three matched resistance values (Rl 4.057 kOhm, Rm 1.071 kOhm, Rh 0.345 kOhm), which is the kind of per-unit calibration record that ties a sensor to its original controller. Flow range, output type, supply voltage, and calibration are not confirmed for this serial number; verify against Lab Impex documentation before putting it into service.
Key Features
- Nameplate: Lab Impex Systems, England BH17 0GE, Type EFM
- Serial number: B0273/0010, printed on the enclosure label
- Thermistor Data plate: Rl 4.057 kOhm, Rm 1.071 kOhm, Rh 0.345 kOhm
- Wetted path: machined metal flow block with one hose barb fitting at each end
- Electronics housing: black finned extruded enclosure, screw-fastened end plates
- Mounting: folded plate with slotted holes on both flanges for panel or shelf mounting
- Electrical interface: single circular threaded multi-pin connector, male pins
- Marking: hand-lettered silver marker asset number beginning QA1568 on the bracket flange
- Included: the meter assembly only, no cable, mating connector, power supply, or manual
- Flow range, output signal, and supply voltage: not confirmed - verify against Lab Impex documentation before use
Applications
- Lab technician rebuilding a bench fluid loop who needs a compact inline flow element with barbed tubing connections
- Instrument repair shop matching a Lab Impex EFM back to an existing controller by serial number and thermistor values
- Research group harvesting a thermistor-instrumented flow block for a custom cooling or dosing test rig
- Equipment restorer keeping an older British-built laboratory system running with an original-brand part
Frequently Asked Questions
What exactly is included?
You get exactly what is in the photos: one Lab Impex EFM assembly, serial B0273/0010, consisting of the flow block, the finned electronics enclosure, and the mounting bracket. There is no cable, no mating connector, no power supply, and no documentation.
Is this the flange-mount version sized for 1 1/4 inch to 4 inch pipe?
The unit in these photos is the inline hose barb configuration, not a flanged pipe-mount meter, and it has no display or keypad. If you need a specific EFM configuration, pipe size, or output type, message us with what you are matching before you order and we will describe the physical unit in detail.
Has it been tested?
No. We have not powered it up or flowed liquid through it, so we cannot confirm function, accuracy, or calibration. It is offered on its physical condition and its readable nameplate and thermistor data. Verify against Lab Impex documentation before you put it into service.
What do the three thermistor values on the plate mean?
The plate records three per-unit resistance readings, labeled Rl, Rm, and Rh, at 4.057 kOhm, 1.071 kOhm, and 0.345 kOhm. Lab Impex printed them on this specific meter, which is useful if you are pairing it to a controller or reverse-engineering the sensor circuit. We are not able to confirm the reference temperatures they were taken at.
Why buy one unit here instead of a forced lot somewhere else?
Because you probably need one flow meter, not five. We sell the exact quantity in front of you, and there is exactly one of these. Shipping is $8 flat rate and free over $28, so a single instrument lands on your bench for a lot less than a bulk lot you would only pick one piece out of. Same or next business day from Idaho.
Three resistance values printed on a plate, two hose barbs, and a serial number out of England - somebody built this to measure a liquid precisely and wrote the proof on the outside. What flows through it next is your project.
