Document
Miniature Low Pressure Sensors
26PC Series, Compensated/Unamplified 1 psi to 250 psi
Datasheet
Miniature Low Pressure Sensors
The 26PC Series Miniature Pressure Sensors are small, cost-effective devices intended for use with wet or dry media. These sensors feature proven sensing technology that uses a specialized piezoresistive micromachined sensing element to offer high performance, reliability, and accuracy. Each sensor contains four active piezoresistors that form a Wheatstone bridge. When pressure is applied, the resistance changes and the sensor provides a milliVolt output signal that is proportional to the input pressure.
The low power 26PC sensors are designed to accommodate pressures from 1 psi to 250 psi and have an operating temperature range of -40 ºC to 85 ºC [-40 ºF to 185 ºF].
These sensors can accommodate a variety of wet and dry media that are compatible with polyphthalamide (PPA) plastics and media seals specified in the Nomenclature and Order Guide (see Figure 2). The 26PC sensors are RoHS compliant. They are designed and manufactured according to ISO 9001 standards.
What makes our sensors better?
• Wet/Wet capability (i.e., liquids on both ports) • Selectable seals available to match media used • Higher pressure ranges for use in high pressure applications • Wide variety of pressure port types • Available in both SIP and DIP packages
26PCXXH6D
26PCXXJ6G
26PCXXK2G
For all available configurations, see Table 4.
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MINIATURE • WET/WET Capability • SELECTABLE SEALS
Features and Benefits
One sensor does the work of two!
True wet/wet differential media sensing Provides liquid sensing in differential applications Wide operating temperature range of -40 ºC to 85 ºC [-40 ºF to 185 ºF] Allows use in a wide variety of applications
By matching pressure ranges to the application, we optimize resolution and improve system accuracy.
Variety of pressure ranges within 1 psi to 250 psi Provides flexibility in customers’ pneumatic designs Absolute, differential, and gage measurement types Allows customers to choose the sensor that fits their application
Gives customers greater system flexibility in their designs.
Variety of pressure port Types and lead terminations Provides application flexibility Also available in SMT and flow-through package styles Provides added design flexibility
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Potential Applications
MEDICAL OXygen Conentrators May be used to measure the sieve bed pressure to optimize system performance DENTAL CHAIRS May be used to control the pneumatic pressure in the various dental instruments HEMODIALYSIS May be used to monitor the correct pressure to help ensure optimum blood filtration INDUSTRIAL Water CONTROL VALVES May be used to monitor the water consumption in homes and buildings IRRIGATION EQUIPMENT May be used to control the water pressure and flow being delivered FILTER MONITORING May be used to detect when the filters are clogged and need to be replaced PRESSURE VALVES May be used to measure and control pressure in industrial processes AIR COMPRESSORS May be used to control the pressure being delivered to the end user equipment breathalizerS May be used to measure the exhalation pressure to ensure proper breath analysis
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26PC Series, Compensated/Unamplified
Table 1. Absolute Maximum Ratings1
Characteristic
Min.
Typ.
Max.
Unit
Note
Supply voltage
2.5
10
16
Vdc
–
Input resistance
5.5
7.5
11.5
kOhm
–
Output resistance
1.5
2.5
3
kOhm
–
Time response
–
–
1
ms
2
1Absolute maximum ratings are the extreme limits the device will withstand without damage.
2Time required for the output to increase from 10% to 90% of span in response to a step change in input pressure from the specified min. to max. operating pressure.
Table 2. Technical Specifications Characteristic Operating temperature range: without EPDM seals with EPDM seals Compensated temperature range Storage temperature range Soldering terminal temperature/time Vibration Shock Life
Parameter
-40 °C to 85 °C [-40 °F to 185 °F] -20 °C to 85 °C [-4 °F to 185 °F] 0 °C to 50 °C [32 °F to 122 °F] -55 °C to 100 °C [-67 °F to 212 °F] 315 °C [599 °F] max./10 s max.
10 G at 20 Hz to 2000 Hz 100 G for 11 ms
1 million cycles min.
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Miniature Low Pressure Sensors
Table 3. Performance Characteristics (Vcc =10.00 ±0.01 Vdc; Ta = 25 °C [77 °F])
Characteristic
0 psi to 1 psi
Typ. Max.
0 psi to 5 psi
Typ. Max.
0 psi to 15 psi
Typ. Max.
0 psi to 30 psi
Typ. Max.
0 psi to 100 psi
Typ. Max.
0 psi to 250 psi
Typ. Max.
Unit
Note
Span
– 16.7 ±2 – 50 ±3 – 100 ±3 – 100 ±3 – 100 ±3 – 150 ±7 mV
1
Null offset
– 0 ±1.5 – 0 ±1.5 – 0 ±1.5 – 0 ±1.5 – 0 ±2.0 – 0 ±2.0 mV
2
Linearity (Best
Fit Straight Line, 0.25 0.5
0.4
0.5 0.25 0.5
0.1
0.2
0.4
0.6
0.5
0.7 %span 3
P2>P1)
Null shift
(0 °C to 25 °C, ±0.5 ±1.0 ±0.5 ±1.0 .