The Honeywell 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
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
Potential Applications
MEDICA
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
| 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 |
1 Absolute maximum ratings are the extreme limits the device will withstand without damage.
2 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 |
Parameter |
Operating temperature range:
without EPDM seals
with EPDM seals |
|
| -40 °C to 85 °C [-40 °F to 185 °F] |
| -20 °C to 85 °C [-4 °F to 185 °F] |
| Compensated temperature range |
0 °C to 50 °C [32 °F to 122 °F] |
| Storage temperature range |
-55 °C to 100 °C [-67 °F to 212 °F] |
| Soldering terminal temperature/time |
315 °C [599 °F] max./10 s max. |
| Vibration |
10 G at 20 Hz to 2000 Hz |
| Shock |
100 G for 11 ms |
| Life |
1 million cycles min. |
| Miniature Low Pressure Sensors |
| Table 3. Performance Characteristics (Vcc =10.00 ±0.01 Vdc; Ta = 25 °C [77 °f]) |
| Characteristic |
|
Unit |
note |
0 psi to
1 psi |
0 psi to
5 psi |
0 psi to
15 psi |
0 psi to
30 psi |
0 psi to
100 psi |
0 psi to
250 psi |
| Typ. |
max. |
Typ. |
max. |
Typ. |
max. |
Typ. |
max. |
Typ. |
max. |
Typ. |
max. |
Span
Null offset
Linearity (Best
Fit Straight Line,
P2>P1)
Null shift
(0 °C to 25 °C,
25 °C to 50 °C)
Span shift
(0 °C to 25 °C,
25 °C to 50 °C)
Repeatability
and hysteresis
Overpressure |
-
-
0.25
±0.5
±1.0
±0.5
- |
16.7 ±2
0 ±1.5
0.5
±1.0
±2.0
-
20 |
-
-
0.4
±0.5
±1.0
±0.2
- |
50 ±3
0 ±1.5
0.5
±1.0
±1.5
-
20 |
-
-
0.25
±0.5
±0.75
±0.2
- |
100 ±3
0 ±1.5
0.5
±1.0
±1.5
-
45 |
-
-
0.1
±0.75
±0.75
±0.2
- |
100 ±3
0 ±1.5
0.2
±1.5
±1.5
-
60 |
-
-
0.4
±1.0
±0.5
±0.2
- |
100 ±3
0 ±2.0
0.6
±2.0
±1.5
-
200 |
-
-
0.5
±1.0
±0.5
±0.2
- |
150 ±7
0 ±2.0
0.7
±2.0
±1.5
-
500 |
mV
mV
%span
mV
%span
mV
psi |
1
2
3
4
5
6
7 |
1 Span is the algebraic difference between the output signal measured at the upper and lower limits of the operating pressure range, where Port 2 (P2)>Port 1 (P1).
2 The output signal obtained when zero pressure is applied to all available ports.
3 The maximum deviation of product output from a straight line fitted to the output measured over the specified operating pressure range, calculated according to BFSL. The straight line is fitted along a set of points that minimizes the sum of the square of the deviations of each of the points ("leastsquares" method).
4 The maximum deviation in offset due to changes in temperature over the compensated temperature range, relative to offset measured at a reference temperature of 25 °C.
5 The maximum deviation in span due to changes in temperature over the compensated temperature range, relative to full-scale span measured at a reference temperature of 25 °C.
6 Repeatability is the maximum difference between the output readings when the same pressure is applied consecutively, under the same operating conditions, with pressure approaching from the same direction within the specified operating pressure range. Hysteresis is the maximum difference between output readings when the same pressure is applied consecutively, under the same operating conditions, with pressure approaching from opposite directions within the specified operating pressure range.
7 Overpressure is the maximum pressure that may safely be applied to the product for it to remain in specification once pressure is returned to the operating pressure range. Exposure to higher pressures may cause permanent damage to the product. Unless otherwise specified, this applies to all available pressure ports at any temperature within the operating temperature range.
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