Gems Sensors Pressure Transmitter Transducer

Gems Sensors Pressure Transmitter Transducer

 820G Series - Absolute Pressure Transmitter/Transducer

Quick Specs... 

• Standard Torr, kPa and mbar Vacuum Ranges 
• Wide Compensated Operating Temperature 
• Protected Against Miswiring 

Overview / Design Principle: 

The 820G Series sensor is an accurate, low cost absolute sensor for even the most demanding vacuum applications. An all-welded construction eliminates stability issues inherent in other designs caused by frictional contact between dissimilar metals. 820G Series manometers are offered with a variety of vacuum pressure fittings, and a rugged design provides a high overpressure capability over a wide temperature range. 

How they Operate: 

820G Series manometers feature an Inconel ® diaphragm and insulated electrode, which forms a variable capacitor. As pressure (vacuum) increases or decreases, the capacitance changes. This capacitance is detected and converted to a fully-conditioned linear voltage output signal. 

Applications: 

• Semiconductor Manufacturing 
• Absorption Chillers 
• Lasers 
• Autoclaves 
• Freeze Drying 
• Vacuum Distillation

  Specifications
  Input
  Pressure Range		0 to 1000 Torr or 0 to 100 kPa
  Proof Pressure		See ordering chart
  Burst Pressure		See ordering chart
  Fatigue Life		>1 million cycles
  Performance
  Output		0-5 Vdc or 0-10 Vdc @6mA (3 wire)
  Supply Voltage (Vs)		9-30 Vdc (14-30 Vdc for 10 Vdc output)
  Long Term Drift		±0.5% FS/year
  Accuracy		±0.5% RDG
  Thermal Error Zero		±0.01% FS/°F (±0.018% FS/°C)
  Thermal Error Span		±0.015% RDG/°F (±0.027% RDG/°C)
  Compensated Temperature		32°F to +122°F (0°C to +50°C)
  Operating Temperatures		-4°F to +176°F (-20°C to +80°C)
  Storage Temperatures		-4°F to +185°F (-20°C to +85°C)
  Zero Tolerance		.5% FS
  Span Tolerance		.5% FS
  Minimum Load Resistance		5000 ohms
  Response Time		20 ms
  Mechanical Configuration
  Pressure Port		See ordering chart
  Wetted Parts		Inconel® with Stainless Steel (4 T fitting- All Inconel)
  Electrical Connection		9-Pin D-Sub
  Enclosure		All Welded Stainless Steel
  Shock		50g
  Approvals		CE - 89/336/EEC for Heavy Industrial
  Weight		5 oz

Dimensions:

Inconel®

Fitting Code 4T = 0.5" O.D. Tube A   1.50/38 DIA.  B   0.12/3  C   2.06/52  D   0.94/24  E   0.50/12.70

Inconel® Tube with Stainless Steel Pressure Fitting

Fitting Code N1 = ISO NW16 A   1.09/28  B   1.18/29 DIA.

Inconel® Tube with Stainless Steel Pressure Fitting

Fitting Code N2 = ISO NW25 A   1.09/28  B   1.58/40  DIA.

Inconel® Tube with Stainless Steel Pressure Fitting

Fitting Code N4 = ISO NW40 A  1.09/28  B  2.16/55 DIA.

Inconel® Tube with Stainless Steel Pressure Fitting

Fitting Code D8 = 8 VCR® Female Swivel A  1.69/43  VCR® is registered trademark of Swagelok Marketing Co. Inconel® is a registered trademark of Special Metals Corp.