Hind High Vacuum Company Private Limited - Measurement Gauges & Fittings

This is a cold cathode ionisation Gauge consisting of two electrodes anode and cathode. A potential difference of about 2.2 KV is applied between anode and cathode through current limiting resistors. A magnetic field is introduced at right angles to the plane of the electrodes by a permanent magnet having nearly 800 gauss magnetic field which will increase the ionisation current.

This electrically heated filament is an arm of a self balancing wheat stone bridge circuit. An automatic control amplifier corrects bridge voltage automatically, so that the filament temperature is kept constant around 120C throughout the whole measuring range. Thus the required bridge voltage (which varies depending upon the pressure at the sensor head filament) is a measure of the pressure which after proper conditioning and calibration is displayed on the meter

Thisis a cold cathode Ionisation gauge consisting of two electrodes anode and cathode. A potential difference of about 2.2 KV is applied between anode and cathode through current limiting resistors. A magnetic field is introduced at right angles to the plane of the electrodes by a permanent magnet having nearly 800 gauss magnetic field which will increase the ionisation current. The electrons emitted from the cathode (gauge head body) of the gauge head are deflected by means of magnetic field applied at right angles to the plane of the electrodes and are made to take helical path before reaching the anode loop. Thus following very long path, the chance of collision with gas molecule is high even at low pressures.

HHV programmabel Micro-vac gauge cum controller consists of four modules namely, Pirani module, Penning module, CPU cum set point controller module, and a power supply module. The gauge is designed using the latest micro controller, which enables accurate and fast measurement

The Pirani Gauge head filament has high temperature co-efficient of resistance. So a slight change in system pressure brings about useful change in filament resistance resulting in an out of balance voltage which can be read as a pressure on meter. The Pirani Gauge head indicates the total pressure of combined gases and undesirable vapors in the system on the thread wire can loss heat to both gas and vapor molecules.