SCXL004DN
Precision Compensated, Low Pressure Sensors
FEATURES
• 0 - 4 In. H
2
O
• Very Low Pressure
Resolution
• Precision Temperature
Compensation
• Low Noise
• Calibrated Zero and Span
• High Impedance for
Low Power 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 non-
corrosive, 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
APPLICATIONS
• Air Flow
• Respirators
• HVAC
EQUIVALENT CIRCUIT
ELECTRICAL CONNECTIONS
Bottom View
Pin
Pin
Pin
Pin
Pin
Pin
1.
2.
3.
4.
5.
6.
Temperature Output (+)
V
S
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: tope@ms1.hinet.net, http://www.sensor.com.tw
SCXL004DN
Precision Compensated, Low Pressure Sensors
PRESSURE SENSOR CHARACTERISTICS
MAXIMUM RATINGS
Supply Voltage V
S
Common-mode Pressure
Lead Temperature (Soldering, 4 seconds)
Proof Pressure
Burst Pressure
+18 V
DC
150 In. H
2
O
250°C
10 In. H
2
O
5 psi
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. H
2
O max.
overpressure.
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 Hysteresis
3
Temperature Effect on Span (0-50°C)
4
Temperature Effect on Offset (0-50°C)
4
Repeatability
5
Input Impedance
6
Output Impedance
7
Common-mode Voltage
8
Response Time
9
Long Term Stability of Offset and Span
10
Position Sensitivity
Proof Pressure
11
Min.
---
---
38
-1.5
---
---
---
---
---
---
5.7
---
---
---
---
Typ.
---
10
40
0
±0.5
±0.5
±0.50
±0.2
4.0
4.0
6.0
500
±0.5
0.25
10
Max.
4
---
42
1.5
±1.0
±2.0
±1.5
---
---
---
6.3
---
---
---
---
Unit
In. H
2
O
mV/In. H
2
O
mV
mV
%FS
%FS
mV
%FS
kΩ
kΩ
V
DC
µs
%FS
mV/g
In. H
2
O
SPECIFICATION NOTES:
1.
2.
3.
4.
5.
Reference conditions: Unless otherwise noted: Supply voltage, V
S
= 12 V, T
A
= 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.
6.
7.
8.
9.
10.
11.
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
0 to 4 In. WC
Part Number
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. H
2
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
Sensor
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