Vacuum Techniques Private Limited

Product Code : vt-ACG-03

Description

Measuring Instruments

FEATURES : Metal Guage head with std. KF-25 coupling for penning gauge and KF-10 for Pirani gauge Reading displayed on two ranges in an analog meter for good resolution (Penning reading) Fast & Accurate indication Excellent reproducibility Mains fuse protector-Accessible from outside. Simple, compact and economically priced for reliable and trouble free operation.

Product Code : vt-DHP-01

Description

Vacuum Techniques Digital High Pressure Pirani Gauge Model No. VT-DHP-01 is a highly reliable Microprocessor based Digital Gauge which is calibrated for dry-nitrogen. For other gases, calibration factor differs.

FEATURES : Extremely fast response time Covering range from atmosphere to 1x10-3 mbar Rugged construction of sensors Digital display Built in controller set point Recorder output available Single gauge head for entire measuring range Metal Gauge Head with standard KF-10 coupling Mains fuse protected, accessible from outside.

Product Code : vt-DCG-03

Description

Digital Pirani - Penning Gauge

FEATURES : Channel Selection Sequential scan facility All functions generated through ‘UP’ & ‘DOWN’ keys Recorder output available apart from RS-232C serial output Port Independent relays for each channel Digital display Fast and Accurate indication Excellent reproductibility Mains fuse protected-Accessible from outside.

Product Code : vt-DTM-01

Description

Digital Thickness Monitor

Specifications : Thickness maximum : Transducer limited typically 5000 micro gm/sq.cm. As much as 20,000 micro gm/sq for well behaved materials (2.0 micro gm/sq.cm= 37 Ang.A). Rate Display: 3 digit LED Thickness display : Automatically varied 0.4 to 5 update/sec. Static thickness resolution : 1 Ang at min update rate Input parameter : Tooling factor, density and acoustic impedance inputs allow readout directly in angstroms. Films no: Allows input parameter for 1 to 100 films to be entered. Tooling factor : 1.0 to 999.9% Film accoustc impedance : 5.000 to 99.99x10-5gm/cm.sec. Shutter control : Dedicated relay. Thickness set point : 0.000 to 990.9% K.Ang. shutter relay closed when displayed thickness equals or exceed set point. Start Control : Zero thickness and open shutter relay Stop Control : Zero thickness and close shutter relay Shutter position indicator : LED `ON` indicates shutter relay activated. Crystal compatibility: 5 or 6 MHz, jumper, jumper selectable. Crystal Holder : Water cooled. Crystal health : % of crystal life remaining 0% of life referenced to a film thickness of 925K.A of Aluminium. Crystal Frequency : 5 or 6 MHz. (Selectable) Output control : Rate of thickness select. Full scale and zero scale O/P useful in calibration recording equipment. Self test : Automatic detection and indication of oscillator failure, power line failure, internal failure Power requirement : 230V AC, 50Hz, 5 Amps.

Product Code : vt-BAG-01

Description

The Vacuum Techniques microprocessor based BA (Bayard Alpert) ionization gauge controller consists of various circuits for the gauge head to function like electrometer amplifier, CPU and indication system with various protection and feed back, relay set points, recorder output and RS 232 for PC interfacing. The control unit matches with any manufacturer gauge head. Normally the control unit is supplied with imported gauge head.

PRINCIPLE Electron emitted from the hot filament of a triode system are accelerated to about 150V and on their journey to +Ve grid ionize a certain number of gas molecules by bombardment. The number of +Ve ions thus formed depends on pressure, nature of gas molecules ,electron current and the geometry of the gauge head. With proper choice , it is possible to calibrate ion current with pressure. Using main CPU, various combination of gauge can be made to extend and suit application requirement . Pirani gauge can be added to cover the range from atmosphere to 1x10-10 mbar. Gauge control can be made suitable to any standard ionization gauge sensors.