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MD-490M Helium Leak Detector

MD-490M, 966-493

The MD-490M is at the heart of VIC’s turnkey vacuum mass spectrometer systems which feature ease of service and its adaptability for system use.

Our Leak Detection Systems use the most sensitive and accurate leak detection device science has developed -- the helium mass spectrometer. The helium mass spectrometer is at least 1000 times more sensitive than other leak detection methods. V.I.C. Leak Detection has taken the helium mass spectrometer out of the laboratory, where it has served as a research tool for over 30 years, and redesigned it to meet the stringent requirements of ruggedness, reliability and ease of maintenance that are essential in any industrial environment.

V.I.C.'s Industrial Leak Detection Systems are designed around a standard Turbo - Test MD-490M industrial leak detector, which is manufactured independently from the application.



Performance Specifications
Sensitivity System Mode, minimum detectable helium leak rate 2.5 x 10-9 atm- cc/sec.
  Sniffer Mode, minimum detectable helium leak rate 2.5 x 10-7 atm- cc/sec.
Response Time < 1.0 second system mode testing.
  < 1.5 seconds sniffer mode testing.


Display Leak Rate Range
System Mode Testing 0-10 Volts output to main PLC.  Leak rate configured to systems calibrated gas leak.
Interface Signals Auto-Zero, Ready, Leak Rate and Fault Signals.
Sniffer Mode Testing 10-3 to 10-7 atm-cc/sec He direct-reading.
Start-Up Time Cold Start-Up, less than 3 minutes.
  Standby Start-Up, less than 1 minute.
  One button automatic operation.


Vacuum System
Mechanical Pump External forepump arrangement, standard package with 7 CFM.
High Vacuum Pump 60 liter/second air-cooled turbomolecular.
Inlet System External PLC controlled valves, externally mounted.
Pressure Measurement Thermocouple input for rough vacuum (atm-10-3 Torr), Turbopump speed characteristics for high vacuum (10-6 Torr).
Valve High vacuum rated solenoid actuated foreline isolation.


Power 115 VAC/60 Hz, 6 Amp, (other voltages available upon request).
Console Microprocessor-based electronics incorporating 40-character alphanumeric prompting display. Full automatic operation including start-up, shutdown, leak rate ranging, zero control, high vacuum protection and diagnostics including runtime, and operating parameters.
Remote Operation Box Includes 40 segment leak rate signal indicator and operator function controls.  A 15' coiled cord is supplied.
Audio Built-in ramp type audio alarm with large 4" high output speaker. Volume and threshold adjustments provided.


Dimensions 13-9/16”W, 24-5/16”D, 15-9/16”H (344mm W, 618mm D, 395mm H)
Weight 70lbs (32kg.)

Product information is subject to change without notice. Product images may include options or accessories not included with the base model.
Made in USA Vacuum Instruments Corporation is a pioneer in providing state-of-the-art leak detection solutions for diverse applications and industries. Our systems have ensured the safety and performance of countless products that we use in our daily lives from the cars we drive to the air conditioners in our houses, the pacemakers in our bodies, and the satellites we launch into space.
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Vacuum Instruments Corporation, LLC
2101 Ninth Avenue, Ronkonkoma, NY 11779 USA
Vacuum Instruments Corporation
2101 Ninth Avenue 11779 Ronkonkoma, NY
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