RPC Meta-chrom, Co. Ldt. offers customers to purchase by reasonable price digital vacuum gauge for measuring of pressure of diluted gases. All products are of highest quality and has certificates of conformity. Digital vacuum gauge produced by Meta-chrom was recognized as a laureate and was awarded a corresponding diploma on results of competition “Best native measuring instrument-2008”
Purpose and application of vacuum gauge
Unit is designed for measuring of diluted gases pressure. Vacuum gauge gives opportunity to control the work of vacuum pumps, determine degree of rarefaction in technical cavities and oil pipes, perform several tasks in laboratories. Nowadays digital devices are very popular due to simplicity of operation, accuracy of readings and wide range of applications. Vacuum gauge is used in following spheres:
- - Chemical industry.
- - Lyophilization.
- - Service of pumps of vacuum type.
- - Systems of molecular distillation.
- - Spectrometry and analyzers.
- - Refilling and vacuumizing of cooling systems.
- - Vacuum thermal insulation, pipelines and double-walled vessels.
- - Vacuum packaging.
- - Quality control.
- - Electronic and semiconductor elements production.
Vacuum gauges are especially relevant in the spheres where one of the main working orientations is examination and analysis of gaseous substances.
Device works in continuous range of pressure values without switching of measurement limits from 100
Characteristic of vacuum gauge
Device produced by Meta-chrom represents vacuum gauge of ionization-thermocouple type with continuous range of pressure measurements. System “automat” of sensor switching and system of emission current control of hardware-software type are used in the device. Digital device is supplied with built-in display, which displays the set and measured parameters. Unit control can be performed either from keyboard located on the corpus of the unit or remotely from PC through interface RS-485 (for control of electronic leak valve of gases).
Design of digital vacuum gauge
Device is equipped with two channels measuring pressure in vacuum system. Low vacuum is measured by channel of thermocouple lamp, which is switched on together with vacuum gauge. When vacuum level reaches the value of 3 Pa, power of ionization lamp is switched on and it measures the vacuum. At that measurement channel of thermocouple lamp is not switched off and is performing the function of fuse. In other words if vacuum level falls under 3 Pa again, then ionization lamp is automatically switched off, and measurements are done by thermocouple lamp. In case of pressure increase, and its value will be above 3 Pa, ionization channel is switched off and data from both sensors is shown on display. Application of digital device “Meta-chrom” is possible in units with manual and automatic methods of control.
Technical characteristics of digital vacuum gauge
- • Range of measured pressure by thermocouple lamp
ПМТ-2, torr (mm. of. mercury.) —from 10-3 to 10-1, sensitive up to 1 atm. - • Range of measured pressure by ionization lamp
ПМИ-51, torr (mm. of. mercury.) —from 7,5×10-8 to 7,5×10-2 . - • Range of gas pressures measured by vacuum gauge — from 75
to 10-5 Pa (0,1 —7,5×10-7 мм. рт. ст.). (In consideration with conversion factors usage of vacuum gauge for measuring of other gases pressures is possible.) - • Work with thermocouple converters:
ПМТ-2 ,ПМТ-4М . - • Work with with ionization converters:
ПМИ-2 ,ПМИ-51 ,ПМИ-10-2 . - • Indication in different measuring units is provided — Pa, mm. of. mercury. (torr).
- • Response time of sensor (ionization type) — 0,1 sec.
- • Electric power from single-phase network AC power with voltage from 187 to 242 V, frequency (50±1) Hz, work mode – continuous.
- • Value of power consumption (without including PC) — no more than 30 VA.
- • Overall dimensions — 165×350×215 mm (width x depth x height).
- Mass — no more than 3 kg.
