Measuring range of 4 decades from 1.0E-1 to 1333 mbar
Cost attractive alternative to traditional 1000 Torr full-scale CDGs
Gas-independent measurement throughout the pressure range
Corrosion resistant Ceramic or Parylene diaphragm
0-10 VDC programmable voltage output
Digital RS-232 or RS-485 interface
Optional solid-state setpoint relays for external controlling
Drop-in replacement with other vendors’ vacuum gauges
Designed, engineered and made in Denmark
The VDM-2 Ceramic Diaphragm vacuum transducer is based on a corrosion resistant aluminum oxide diaphragm that bends as function of the applied pressure. The core pressure sensor element utilizes piezo resistive measurement. The diaphragm sensor measures the vacuum gas pressure independently of gas type or composition.
Compared to stainless steel Piezo vacuum transducers that typically use oil-filled sensor elements, the Ceramic Piezo sensor element is clean and dry, eliminating the risk of contaminating the vacuum system.
Capacitance diaphragm gauges are used in many vacuum applications for measurement and control of advanced processes. The VDM-2 transducer is a cost-effective and compact alternative to traditional 1000 Torr/mbar full-scale Capacitance Diaphragm Gauges (CDGs).
The VDM-2 enables use in demanding vacuum applications where corrosive gases and chemical compounds may be present. The Ceramic aluminum oxide diaphragm offers excellent corrosion resistant properties against many solvents and acids.
The VDM-2 transducer is also available with an optional Parylene protective barrier to guard against corrosion or oxidation of sensor materials. Parylene, a unique polymer with highly corrosion resistant and hydrophobic properties, is specifically designed for medical applications such as lyophilization and hydrogen peroxide plasma sterilization of medical devices.
In vacuum systems and processes where macroscopic particulates are present, the optional protective baffle acts as an efficient barrier against deposition of contaminants on the sensor diaphragm.
The aluminum oxide sensor element is designed to be robust, capable of withstanding instant ventilation and over-pressurization up to 2 bar absolute (29 psia).
The drop-in replacement vacuum transducers are designed with connector pin-out compatibility, enabling seamless replacement of other vendor gauges without change of cabling.
Additionally, these transducers emulate the analog output scaling and range of equivalent products from other manufacturers.
Moreover, Sens4 transducers have the capability to emulate the digital serial communication protocol, facilitating easy installation without requiring adjustments to the communication software of the vacuum equipment. This digital protocol emulation ensures compatibility with power supply and controller display units from different vendors.
The analog output provides a voltage signal for external pressure readout or controls.
The VDM-2 transducer is available with many different preconfigured analog output curves for seamless replacement of gauges from various vendors.
Furthermore, the output can be configured by the user for arbitrary linear scaling.
The RS-232 and RS-485 serial interfaces facilitate the transfer of measurement data with no signal degradation over extended cable lengths or interference from electrical noise.
The digital interface enables diagnostics, predictive maintenance, service, calibration, setpoint configuration, analog output scaling and acquisition of real-time vacuum pressure measurements for on-screen visualization.
When the analog output is set to a reduced measuring range, such as 100 Torr full scale, the digital output independently provides full range measurements up to 1333 mbar (1000 Torr).
A capacitance diaphragm gauge, commonly referred to as a CDG, measures vacuum gas pressure by direct measurement of the applied force on the surface of a thin diaphragm.
A traditional capacitance vacuum transducer measures absolute.........
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