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Digital pirani gauge DHVE DHVE Vacuum Pirani Gauge Controller displays vacuum pressure as measured from a S-PR-GH sensor tube. It displays vacuum measurements based on thermal conductivity of air or nitrogen. The Model DHVE controller covers the range from 0.001bar to 999 mbar, and controls relay with independent set point. ***The optional RS232 along with analog output 0 to 10V and 4 to 20 mA facility can be obtained on request Applications • Controlling high vacuum systems • Fore vacuum pressure monitoring • Safety circuits in vacuum systems • General vacuum measurement & control in the fine and rough vacuum range. • Measurement range 0.001 to 999 mbar • Easy “ATM” and “0” adjustment on the signal conditioner PCB • Space saving rugged design- 1/8 DIN console • Mounts in any orientation • Brass body measuring cell with metal-sealed feed through • With universal power supply – input voltage from 90 ~ 264VAC, frequency 47 ~ 440Hz • Integrated set point adjustment and relay output • Easy To Read 4 Digit Backlit Display • Dual Set Point Controller With 2 Relays (select model DPRG-2GH-SP) • Change Cable Length Without Re-calibrating upt o 8 mtrs
Vacuum pumping System : Vacuum Pumping systems are the most reliable and cost-effective means for producing high vacuum. The vacuum pumping systems are trolley mounted for easy movement and has capable of achieving an ultimate vacuum of10 -6 m.bar with Liquid nitrogen trap. DHVE offers many choices of vacuum pumping system, with different pumping speeds for various application, ranges from DHVE-65D, DHVE-75D, DHVE-114D, DHVE- 150D, DHVE-225F , DHVE300F and Custom built suitable for the most of the vacuum applications. The standard Vacuum Pumping Systems consists of DHVE Rotary Vacuum Pump, Diffusion pumps and other hardware like valves, baffles, collar, gauge and plumbing lines with Pirani Gauge to measure the roughing and backing vacuum & Penning gauge for measuring the high vacuum. etc.
Vacuum System: Vacuum Coting Plant (Silver, Hard and Ranbow coating) Roll cotter vacuum metlising plant Vacuum Oven System Vacuum Furnace Vacuum Impregnation Plants Vacuum pumping system Vacuum Diffusion System Custom Built Vacuum System, http://www.dhve.in/
VACUUM IMPREGNATION SYSTEM , DHVE Vacuum impregnatiion system are used to impregnate electrical materials of transformers, coils and other items for good insulation. The growth of missile technology and space re-entry system is demanding new types of materials which will be light but hard . Resin impregnation is a well developed technology for developing such exotic materials .
Vacuum Thin Film Coating Unit : DHVEoffers Vacuum Thin Film Coating Unit for Laboratory and Industrial Purpose.Essentially there are two types. Thin Film Coating Unit. RF & DC Sputtering Unit Vacuum Coater produces thin, homogenous, uniform, pure film coatings of various metals to achieve controlled effects in applications like optics, electronics, materials, thin film coating etc. DHVE offers Different size of Vacuum Thin Film Coating Unit Model 12A4, 15F6, 19F9 & 24F10 with facilities for thermal evaporation, Ion cleaning (bombardment), etc. with accessories for substrate heating, rotation, film thickness monitoring etc. This is a versatile unit both for production as well as research. Optional accessories increase the versatility of the unit making it suitable for a variety of applications, including optical thin film deposition, semiconductors, and micro-electronics. A high speed vacuum pumping system fully integrated with necessary piping and valves operated manually is rated for high gas through- put handling and to produce clean and high vacuum in the chamber. This Vacuum Coating system is wired to operate on 230 V AC, 50Hz single phase power supply / 415 V AC 3 phase power sup
Digital Penning Gauge - DHVE 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. The secondary electrons produced by ionisation themselves perform similar oscillations and the rate of ionisation increases rapidly. Eventually, the electrons are captured by the anode and equilibrium is reached when the number of electrons produced per second by ionisation is the sum of positive ion current to the cathode and the electron current to the anode and is used to measure the pressure of the gas. This instrument with the sensor having wider range of applications, in high vacuum systems where the final Vacuum to be measured in process chamber. These instruments can be used in high vacuum systems, coating units, sputtering units, vacuum furnaces and many other applications where high vacuum to be measured in the range of 10-2 to 10-6 m.bar.
Impegration Plant : The critical factor for any successful Impregnation plant is to ensure that customer's environment uses a process that provides an effective impregnation and a complete sealant solution all the time. At DHVE, we design Impregnation system that exactly fits the customer specifications. Our highly skilled engineers continuously leverage upon our rich industry experience and expertise to design, build and run impregnation systems successfully. Please call us to discuss your specific application and we will be happy to assist.
ANALOG PIRANI VACUUM GAUGE DHVE pirani gauges have very wide range of applications where the vacuum measurement needs to be carried between 0.5 mbar to 0.001 mbar. Working principle: The sensor tube of the pirani gauge head consists of a high temperature co-efficient resistance filament. The filament is heated with a constant voltage supply. The variation in pressure in vacuum line causes changes concentration of gas molecules present , in turn the variation in the thermal conductivity of the gas. Hence the heat loss of the electrically heated filament varies with respect to the pressure. This filament is constructed as an arm of the wheat stone bridge. A slight change in system pressure brings larger change in filament resistivity resulting in an imbalance of the bridge. this bridge imbalance current is a measure of pressure which is properly conditioned and displayed on the analog meter.
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