SSI Technologies – Application Note PS-AN6
MediaGauge™ (Model MG1-9V) Digital Pressure Gauge
Product Overview
Product Description
The MediaGauge™ Model MG1-9V is a NEMA 4X rated stand alone 9V battery operated multi-functional digital pressure gauge with a standard input pressure port made of 316L stainless steel which has better pitting corrosion resistance in some media, such as seawater. The MediaGauge™ MG1-9V is well suited for marine applications.
The MediaGauge™ MG1-9V contains a media isolated piezoresistive pressure sensing element, signal conditioning circuitry for temperature and calibration compensation, a pressure port and a LCD back lit display. The MG1-9V has an accuracy of
± 1.0% full scale and is a lower cost alternative in the SSI MediaGauge™ family of digital pressure gauges.
The MediaGauge™ MG1-9V comes standard with a variety of keypad operated functions – multiple pressure unit display reading (PSI, BAR or MPA); memory storage of maximum peak pressure reading; and zero adjustment.
The MediaGauge™ MG1-9V is made of all laser-welded 316L stainless steel for optimal media isolation and usage in a wide variety of media and corrosion or oxidation resistant applications. These compact 2 ½ inch, robust gauges measure pressures from 5 PSI to 5000 PSI and are well suited for a variety of industrial and commercial applications such as marine, refrigeration, compressors, pumps, hydraulics, pneumatics and waste water.
MediaGauge™ Model MG1-9V
Product Features
Accuracy: ± 1.0 % Full Scale
Pressure Ranges: 5, 30, 100, 200, 500, 1000, 3000, 5000 PSI
The MediaGauge™ MG1-9V digital pressure gauge has better accuracy, longer life and standard multiple functions which make it a better choice than mechanical pressure gauges.
Keypad Operated Functions: Auto zero and peak hold
Operating Temperature: -10°C to 60°C
Storage Temperature: -20°C to 85°C
SSI TECHNOLOGIES, INC.
Controls Division |
Copyright November 6, 2008 |
2643 West Court Street |
SSI Technologies Inc. |
Janesville, WI 53548-5011 |
All Rights Reserved |
Phone: (608)758-1500 |
Revision 3 |
Fax: (608)758-2491 |
|
1
SSI Technologies – Application Note PS-AN6
MediaGauge™ (Model MG1-9V) Digital Pressure Gauge
Product Overview
Typical Applications: General Purpose, Test, Process Control, MRO, Water, Compressors, Refrigeration; Fuel Cells; Pumps; Hydraulics; Spraying Systems; Pneumatics; Flow; Robotics; Agriculture; Hydrogen Storage
NIST traceable certificates available
NEMA 4X Rating
Chemical Compatibilities: Any gas or liquid compatible with 316L stainless steel. For example, Sea Water, Salt Water, Motor Oil, Diesel, Hydraulic fluid, Brake Fluid, Water, Waste Water, Hydrogen, Nitrogen, and Air.
LCD Display Battery Saver Mode: MG1-9V automatically powers down after 3 minutes.
Multiple Pressure Units: PSI, BAR, MPA (kg/cm²)
Compact, Robust Package: 2 ½ inches with black ABS Thermoplastic case
Measurement Technology
In general, pressure measurement technology translates a force from an induced pressure into an electrical quantity. In digital pressure gauges, the electrical quantity is then translated into pressure units and digitally displayed.
The SSI’s MediaGauge™ MG1-9V digital pressure gauge includes an 316L stainless steel input pressure port, a piezoresistive pressure sensing element, signal conditioning circuitry for temperature and calibration compensation, and a LCD that displays the pressure measured in either PSI, BAR or MPA (kg/cm²) units.
The piezoresistive sensing element consists of an oil filled micro-machined 316L stainless steel convoluted diaphragm with a silicon crystal sensor. The silicon crystal sensor is mounted on a 304L stainless steel housing and laser welded to the diaphragm. Optimal media isolation is achieved when the media’s pressure acts directly on the
316L stainless steel diaphragm and is then transferred through the oil to the silicon sensor.
Strain gauges (resistive elements) in the silicon are used in a Wheatstone Bridge circuit. When pressure is applied, the resistivity of the strain gauges changes proportional to the pressure applied. One leg of the bridge measures the input pressures port. The other leg of the bridge is connected to the reference port (vacuum pressure 0 PSI) the input pressure port is compared to.
SSI TECHNOLOGIES, INC.
Controls Division |
Copyright November 6, 2008 |
2643 West Court Street |
SSI Technologies Inc. |
Janesville, WI 53548-5011 |
All Rights Reserved |
Phone: (608)758-1500 |
Revision 3 |
Fax: (608)758-2491 |
|
2
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