Purpose of Coal Mine Underground Gas Desorption InstrumentAn instrument used for geological exploration gas desorption. The HFJ-5 Geological Exploration Gas Desorption Instrument offers the following advantages: simple and compact structure, small size, lightweight, easy to transport and carry; low water consumption, convenient for field or underground operations, suitable for water-scarce measurement sites; the instrument is easy to level, requiring only a small flat surface or suspension.The geological exploration gas desorption instrument uses the water displacement gas collection method, where the desorbed gas displaces the water column in the measuring cylinder, and the gas desorption rate and volume are measured by reading the height of the gas column.

Coal Mine Underground Gas Desorption InstrumentTechnical Parameters
Material: Organic Glass
Dimensions (Case): 100 mm × 100 mm × 500 mm
Case Material: Aluminum Alloy
Weight: Approximately 2 kg
Range: 800 mL per cycle, repeatable measurements
Accessories: Instrument case, rubber hose, needle, instruction manual (excluding coal sample canister)
Coal Mine HFJ-5Coal Mine Underground Gas Desorption Instrument_Geological Exploration Gas Desorption Instrument, Gas Desorption Instrument, Desorption Instrument UsagePrecautions

1. The instrument should not come into contact with liquids that corrode organic glass.
2. To maintain the surface smoothness and transparency of the instrument, avoid scratching the surface as much as possible.
3. Leak Detection: Fill the instrument with water as described in Step 1 of the usage method, let it stand for 1 hour. If bubbles leak in and cause the water level to drop, it indicates a leak; if a leak is found, locate and address the leak point.
HFJ-5 Geological Exploration Gas Desorption Instrument Usage Method
1. Invert the instrument, unscrew the water filling port plug, block the water outlet and air inlet with fingers, fill the internal measuring cylinder with water above the threads, expel any air bubbles, then tighten the plug. Return the instrument to an upright position and release the fingers.
2. Place the instrument on a platform or suspend it, insert the needle into the coal sample canister, then connect the rubber hose to the air inlet to begin desorption measurement. As gas enters the measuring tube, water is discharged through the drainage outlet.
3. If the range is insufficient, clamp the rubber hose, disconnect it from the instrument's air inlet, refill with clean water using the same method as Step 1. Then reconnect the rubber hose, release the clamp, and continue the measurement.

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