Junkers Gas Calorimeter
Product Code : EL-FTLE-10895
Quick Answer: The Junkers Gas Calorimeter determines the Calorific Value of a gas by burning a known volume of it and transferring the heat with maximum efficiency to a steadily flowing, measured volume of water, using the relationship Calorific Value of Gas × Volume of Gas = Volume of Water × Rise in Temperature (assuming the heat capacity of water is unity). It comprises a powder-coated stainless steel Calorimeter with a choice of two burner nozzles mounted on a leveling tripod stand, a wet-type Gas Flow Meter with a mechanical revolution counter to record total gas volume burnt, and a factory-adjusted pressure governor that regulates gas pressure before it reaches the flow meter. It covers a wide range of 120 BTU (1000 to 26000 K Cal/m3).
This Gas Calorimeter works on the Junker’s principle of burning a known volume of gas and imparting the heat with maximum efficiency to steadily flowing water, then finding the rise in temperature of a measured volume of water; the formula, Calorific Value of Gas X Volume of Gas = Volume of water X Rise in Temperature, is then used to determine the Calorific Value of the Gas (assuming that the heat capacity of water is unity).
EQUIPMENT:
This equipment consists of the Calorimeter, with a powder coated stainless steel exterior and a burner (with a choice of two nozzles) on a tripod stand, a Gas Flow Meter, and a pressure governor. The Calorimeter covers a wide range between 120 BTU (1000 to 26000 K Cal/m3), and is fixed on the tripod stand, which has leveling screws to keep it in a perfectly vertical position. It mainly consists of a gas combustion chamber, a heat exchanger, and a water flow system; the heat exchanger is designed for maximum efficiency of heat transfer and is fabricated out of heavily tinned copper sheet.
A constant water head maintenance device, provided in the feed water pipe along with the inlet water flow regulator, is fixed to the outer housing of the Calorimeter, which is of powder coated stainless steel; this constant water level attachment has an over flow device through which excess water drains out. Water from this constant head device enters the bottom of the heat exchanger through the inlet water flow regulator, rises along the annular space, comes up to the filtering position at the top, and gets collected at the swinging funnel attachment; while going up, it absorbs the heat generated by burning the gas in the burner located at the bottom of the central chamber of the Calorimeter. Temperature of the effluent gas can be measured from the thermometer fixed at the exhaust gas outlet.
Provision for fixing the burner is provided at the Calorimeter base, and two thermometers are provided in the water inlet and outlet ports, with an outlet for collection of condensate provided at the bottom. Requisite tubing & measuring jars, as well as thermometers (0.1oC graduation) for reading inlet & outlet water temperatures, are also provided along with a detailed instruction manual.
Gas Flow Meter
It is a wet type Gas Flow Meter, with recording facility on a mechanical counter of the number of revolutions made, which gives total volume of gas burnt. For more details of the Flow Meter, please refer to its individual leaflet.
Pressure Governor
This is to regulate the pressure of gas before it enters the flowmeter. These governors are factory adjusted for a required pressure.
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Last Updated: September 2026
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