SCXL004DN Precision Compensated, Low Pressure Sensors FEATURES • 0 - 4 In. H 2O • Very Low Pressure Resolution • Precision Temperature Compensation • Low Noise • Calibrated Zero and Span • High Impedance for Low Power Applications APPLICATIONS GENERAL DESCRIPTION The SCXL series sensors provide a very cost effective solution for pressure applications that require high accuracy over very low operating pressure ranges. These internally calibrated and temperature compensated sensors were specifically designed to provide an accurate and stable output over a 0°C to 50°C temperature range. This series is intended for use with noncorrosive, non-ionic working fluids such as air and dry gases. The output of the bridge is ratiometric to the supply voltage and operation from any D.C. supply voltage up to +18V is acceptable. Scale: 1cm ½ inch EQUIVALENT CIRCUIT • Air Flow • Respirators • HVAC ELECTRICAL CONNECTIONS Bottom View Pin Pin Pin Pin Pin Pin 1. 2. 3. 4. 5. 6. Temperature Output (+) VS Output (+) Ground Output (-) Temperature Output (-) Note: The polarity indicated is for pressure applied to port B January 1998/043 Tope Co., Ltd. Phone: +886-2-8228-0658, Fax: +886-2-8228-0659 e-mail: [email protected], http://www.sensor.com.tw SCXL004DN Precision Compensated, Low Pressure Sensors PRESSURE SENSOR CHARACTERISTICS WARNING: MAXIMUM RATINGS Due to the delicate nature of these very sensitive devices, some special handling is required. Parts are sensitive to shock and vibration and must be handled with care. Dropping on any hard surface (bench top etc.) can destroy the device. Note 10 In. H2O max. overpressure. Supply Voltage VS Common-mode Pressure Lead Temperature (Soldering, 4 seconds) Proof Pressure Burst Pressure +18 VDC 150 In. H2O 250°C 10 In. H2O 5 psi ENVIRONMENTAL SPECIFICATIONS Temperature Range Compensated Operating Storage Humidity Limits 0 to 50°C 0°C to 70°C 0°C to 70°C 0 to 80 %RH SCXL004 PERFORMANCE CHARACTERISTICS Characteristic Operating Pressure Range Sensitivity Full-scale Span 2 Zero Pressure Offset Combined Linearity and Hysteresis3 Temperature Effect on Span (0-50°C)4 Temperature Effect on Offset (0-50°C)4 Repeatability5 Input Impedance 6 Output Impedance7 Common-mode Voltage8 Response Time 9 Long Term Stability of Offset and Span10 Position Sensitivity Proof Pressure 11 Min. Typ. Max. Unit ----38 -1.5 ------------5.7 --------- --10 40 0 ±0.5 ±0.5 ±0.50 ±0.2 4.0 4.0 6.0 500 ±0.5 0.25 10 4 --42 1.5 ±1.0 ±2.0 ±1.5 ------6.3 --------- In. H2O mV/In. H2O mV mV %FS %FS mV %FS kΩ kΩ VDC µs %FS mV/g In. H2O SPECIFICATION NOTES: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. Reference conditions: Unless otherwise noted: Supply voltage, VS = 12 V, TA = 25°C, Common-mode Line Pressure = 0 psig, Pressure Applied to Port B. Span is the algebraic difference between the output voltage at full-scale pressure and the output at zero pressure. Span is ratiometric to the supply voltage. Zero pressure effect is measured with pins pointed towards the ground. Offset can be position sensitive. Maximum error band of the offset voltage and the error band of the span, relative to the 25°C reading. Maximum difference in output at any pressure with the operating pressure range and temperature within 0°C to +50°C after: a) 100 temperature cycles, 0°C to 50°C b) 1.0 million pressure cycles, 0 psi to full-scale span Input impedance is the impedance between pins 2 and 4. Output impedance is the impedance between pins 3 and 5. This is the common-mode voltage of the output arms (Pins 3 and 5) for V S = 12 V. Response time for a 0 psi to full-scale span pressure step change, 10% to 90% rise time. Long term stability over a one year period. Proof pressure is the pressure above which devices will not return to guaranteed specifications. January 1998/043 Aubinger Weg 27, 82178 Puchheim, Germany Phone 0049 - (0) 89 80 08 30, Fax 0049 - (0) 89 8 00 83 33 http://www.sensortechnics.com SCXL004DN Precision Compensated, Low Pressure Sensors PHYSICAL DIMENSIONS Mass: 5 grams Dimensions in inches (mm) ORDERING INFORMATION To order, use the following part number. Description Part Number 0 to 4 In. WC SCXL004DN WARNING: Due to the delicate nature of these very sensitive devices, some special handling is required. Parts are sensitive to shock and vibration and must be handled with care. Dropping on any hard surface (bench top etc.) can destroy the device. Note 10 In. H2 O max. overpressure. SenSym and Sensortechnics reserve the right to make changes to any products herein. SenSym and Sensortechnics do not assume any liability arising out of the application or use of any product or circuit described herein, neither does it convey any license under its patent rights nor the rights of others. January 1998/043 Aubinger Weg 27, 82178 Puchheim, Germany Phone 0049 - (0) 89 80 08 30, Fax 0049 - (0) 89 8 00 83 33 http://www.sensortechnics.com