MELT PRESSURE TRANSDUCER COMPARISON
 
Transducer Parameters Liquid-Fill Push-Rod Sensonetics
Thickness 0.0045 0.005-0.010 0.022-0.040
Thickness Ratio 1 1.1 - 2.2 5-9
Pressure Transducer Material Stainless Stainless Silicon on Sapphire
Hardness Ratio 1 1 50
Abrasion Resistance Poor Poor Excellent
Fatique Resistance Fair Fair to Poor Excellent
Shock & Vibration Resistance Good Good Excellent
Transducer Hysteresis Yes Yes None
Response Time, mV 30 Milliseconds 30 Milliseconds <100 Micro-Sec
Response Time, 4-20 mA 100 Milliseconds 100 Milliseconds <500 Micro-Sec
Temperature Sensor in Diaphragm No No Optional RTD
J-TC in Threaded Shank Optional Optional  Optional
Accuracy of Melt Temperature Sensor None * None * +/- 0.5o
Response Time Melt Temperature ---- ---- 100 Milli-Sec
* Measures barrel temperature, not plastic TRANSDUCER BODY
 
Body Material Stainless Stainless Stainless
Optional Lengths Yes Yes Yes

TRANSDUCER CONNECTOR
 
Material Aluminum Aluminum Stainless
Insulation Max Temp Rating 200F 200F 600F

TRANSDUCER
 
Type Bonded Bonded Piezo Resistive
  Foil Strain Gage Foil Strain Gage Strain Gage, SOS
Location - Strain Gage Remote Remote Diaphragm
Heat Resistance-Strain Gage 250F 250F 800F
Heat Resistance-Diaphragm, 800F 800F  800F
Fill Material Mercury or NaK Push Rod None
Fill Classification Hazardous Non-Hazardous Non-Hazardous
OK in Food Packaging No  Yes Yes
OK in Medical Products No Yes Yes