Technology Solutions
Instruction Manual
Tek-Bar 3120S
ww.tek-trol.com
5
2
Product Description
2.1
Introduction
Tek-Bar 3120S Piezoresistive Pressure Transducer is made from a high-quality silicon piezoresistive
sensor. This Piezoresistive Sensor is packaged with stainless steel housing. The Tek-Bar 3120S
Piezoresistive Pressure Transducer is a precision-engineered instrument, widely used in industrial
pressure processes. Piezoelectric Pressure Sensors measure dynamic pressures. The compact and
rugged design makes this transmitter suitable for various applications such as process control systems,
hydraulic systems and valves, pumps, refrigeration and HVAC controls, level measurements,
compressor testing technologies, laboratory technologies, combustion engines, diesel engines, steam
turbines and test equipments. A wide range of processes and electrical connection options are available
to meet almost all requirements.
2.2
Measuring Principle
The Tek-Bar 3120S Piezoresistive Pressure Transducer consists of several thin wafers of silicon
embedded between protective surfaces. This protective surface is usually connected to a Wheatstone
bridge, for detecting small differences in resistance. The difference in pressure causes the resistance of
the piezoresistive sensor is change. Due to this change in resistance, a small amount of current is passed
through the sensor. The Wheatstone bridge determines this change.
2.3
Technical Specifications
Accuracy
±0.5% or 1.0% FSO
Thermal Effects
Temp Coeff-Zero: ±0.75%FSO
Temp Coeff-Span: ±0.75%FSO
Long Term Stability
±0.2%FSO/Year
Pressure Range
Pressure Ranges: -14.7 to 8000psi
Over Pressure: 1.5XFS
Process Temperature
Operating Temperature: -
4˚F to 185˚F
(-
20˚C to 85˚C)
Compensated Temperature Range: 14˚F to 158˚F
(-
10˚C to 70˚C)
Storage Temperature: -
40˚F to 257˚F
(-
40˚C to 125˚C)
Vibration
10G (20 to 2000Hz)
Shock
100G (10ms)
Cycles
10X10
6
Cycles
Output Signal
4 to 20mA
0 to 5VDC
1 to 5VDC
0 to 10VDC
Power Supply
10 to 36VDC
Load Resistance
For Current Output: <(Vs-12)/0.02A
For Voltage Output: >10kΩ
