Miniature Low Pressure Sensors
24PC Series, Uncompensated/Unamplified
0.5 psi to 250 psi
Datasheet
Miniature Low Pressure Sensors
The 24PC 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 24PC sensors are designed to accommodate pressures from 0.5 psi to 250 psi and have an operating
temperature range of -40 ºC to 85 ºC [-40 ºF to 185 ºF].
The 24PC sensors have the flexibility to be excited with constant current or constant voltage. When driven by constant
current, the pressure sensor’s terminal voltage will rise with increasing temperature. The rise in voltage not only temperature
compensates the span but also provides an indication of the sensor’s temperature.
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 24PC 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
24PCXXH6D
24PCXXJ6G
24PCXXK2G
For all available configurations, see Table 4.
MINIATURE • WET/WET CApAbIlITy • SElECTAblE SEAlS
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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 0.5 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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24PC Series, Uncompensated/Unamplified
Table 1. absolute maximum ratings
1
Characteristic
Supply voltage
Input resistance
Output resistance
Time response
1
2
min.
2.5
4
4
–
Typ.
10
5
5
–
max.
12
6
6
1
Unit
Vdc
kOhm
kOhm
ms
note
–
–
–
2
Absolute maximum ratings are the extreme limits the device will withstand without damage.
Time 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
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]
-55 °C to100 °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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