The Vacuum Research Diaphragm Manometers are compact vacuum measurement and control instruments that are unaffected by gas composition. The diaphragm is 316L stainless steel and can measure liquid or gas under vacuum.

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Response time is less than 1 second for full scale and instruments are available with a variety of flanges including VCR and CF, NPT or NW styles.

All models of the Diaphragm Manometer provide simulaneous linear outputs of 0 - 10 VDC and 4-20 mA. To improve the resolution of your PLC or data system the 4-20 mA signal can be changed in the field to have spans of either 0 to 1, 0 to 5, 0 to 10, 0 to 50 or 0 to 1000 Torr. 4 mA is always "zero" pressure but by moving a pin jumper on the circuit board 20 mA can be 1, 5, 10, 50 or 1000 Torr.

The Dual Set Point Controller option provides set point values adjusted from the front panel and displayed on the meter. Push-to-set switches simplify display of the set point vacuum. Because it is often helpful to display the vacuum reading in more than one place or to have the diaphragm sensor at a distance from the control room or operators console we offer slave displays. These displays do not have a diaphragm sensor but are accessories to the manometers and can be used with the transmitter, indicator or controller models. The slave is built in a standard 1/4 DIN enclosure for panel mounting and is connected to the manometers with up to 500 ft. (150 m) of 4 conductor cable. The slave is powered with 115/230V, 50/60 Hz and provides 24 VDC to power the manometer. The 4-20 mA signal from the manometer is displayed on the slave in Torr or mbar.

Features:

• 20 milliTorr To 1000 Torr Standard Range
• 316L S.S. Diaphragm Measures Gas Or Liquid
• Select Transmitter, Indicator or Controller
• All 3 Styles Have 0-10 V Plus 4-20 mA Outputs
• Easy To Use; No Keyboards or Scrolling Menus
• Fast Response; Less Than 1 Second Full Scale
• All Popular Flanges Available; NW, VCR, CF

Specifications:

• Standard Range: 0.02 to 1000 Torr
• Optional Range: 0.02 to 1300 mbar
• Display: 4 digit green LED; characters 0.56 in. (15 mm) high.
• Calibration: Any gas, liquid or vacuum compatible with sensor materials.
• Response Time: For increase in pressure less than 1 second. For decrease in pressure below 100 mTorr less than 10 seconds.
• Analog Outputs: 2 simultaneous linear signals

• 0 to 10 Volt DC, linear, for 0 to 1000 Torr (1mv=100 mTorr)
• 4-20 mA. 4mA is always high vacuum ("zero" pressure). But 20 mA can be jumper selected by the user to be 1, 5, 10, 50 or 1000 Torr. Shipped with jumper in 1000 Torr position unless otherwise requested.
• Optional Set Points: SPDT (Form C) max current: 250 mA. Maximum power 350mw, Maximum voltage: 250 V AC/DC.
• Set Point Range: Full range of instrument. 20 mT to 1,000 Torr
• Materials: Diaphragm is 316L Stainless Steel. Other parts in contact with the process are 300 Series Stainless.
• Power: Any voltage from +15 to +35 VDC unreg; Less than 250 mA.
• Wattage: Less than 1 Watt for indicator; 2 Watts with set points.
• Connector: 15 pin DB 15
• Temperature Effects: When changes occur in ambient temperature between 0 oC and 50 oC, reading will change no more than ±0.02% per oC.
• Bakeout Temperature: Instrument can be baked to 100 oC (212 oF) in air or vacuum.
• Weight: Net : 0.75 lbs. (0.34 kg) Ship: 1.5 lbs. (0.68 kg)
• Maximum Pressure: Pressure in excess of 1,000 Torr (5 psig) may damage the diaphragm.

Please click on the links to the right, request a quote or contact Vacuum Research today for more information.