Introduction:

AC31 pressure / temperature sensor series are based on AC11 pressure sensor embeded a PT100 temperature sensor, which detect both precise pressure and temperature signals.

Pressure: A silicon pressure sensors packaged in a 316L stainless steel housing. The sensing package utilizes silicon oil to transfer pressure from the 316L diaphragm to the sensing element.

Temperature: A standard PT100 sensor was embeded in the pressure capsule which used the thermal conductive silicon grease to minimize the hysteresis of temperature signal.

The sensor is designed for o-ring mounting for the applications where compatibility with corrosive media is required.
There are two options of excitation power — current and voltage

Features:

* Low cost OEM
* Pressure range:0-40Kpa…7Mpa
* Wide operable temperature range -40-125℃
* Compatible with corrosive media
* Standard mounting size
* Typical output:0-100mV

Applications:

* Process control
* Medical instruments
* Pressure/Temperature transmitters

Pressure / Temperature Sensor

Specifications of current excitation(1.5mA, 25℃)

Parameters Min. Typical Max.
Accuracy(%FS)
Non-Linearity1 40Kpa ±0.20 ±0.30
>40Kpa ±0.10 ±0.20
Hysteresis ±0.05 ±0.1
Repeatibility ±0.05 ±0.1
Output(mV)
Zero2 40Kpa -1.5 ±0.7 1.5
≥100Kpa -1 ±0.5 1
Span(FS) 70
Temp. characters
 Operation Temp.(℃)3 -40 125
Compensation Temp(℃) 40Kpa 0 50
≥100Kpa -10 70
Zero Temp.error(%FS)4 ±0.75 ±1.0
Span Temp. error(%FS)4 ±0.75 ±1.0
Thermal hysteresis(%FS) 0.1
Long term Stability
Zero (±%FS annual) 0.2
Span (±%FS annual) 0.1
Supply Current 0.5mA 1.5mA 2mA
Input Resistance 2kΩ 2.5kΩ 3kΩ
Output Resistance 2.5kΩ 3kΩ 3.7kΩ
Load Resistance5 5MΩ
Insulation Resistance(100V)6 100MΩ

Specifications of voltage excitation(10VDC 25℃)

Parameters Min. Typical Max.
Accuracy(%FS)
Non-Linearity1 40Kpa ±0.20 ±0.30
>40Kpa ±0.10 ±0.20
Hysteresis ±0.05 ±0.1
Repeatability ±0.05 ±0.1
Output(mV)
Zero2 -2 ±1 2
Span(FS) < 7Mpa 98 100±1 102
7Mpa 147 150±1.5 153
Temp. characters
Operation Temp.(℃)3 -40 125
Compensation Temp(℃) 40Kpa 0 50
≥100Kpa -10 70
Zero Temp.error(%FS) ±0.75 ±1.0
Span Temp. error(%FS)4 ±1 ±1.2
Thermal hysteresis(%FS) 0.1
Long term Stability
Zero (±%FS annual) 0.1
Span (±%FS annual) 0.1
Supply Voltage 10VDC 14VDC
Input Resistance 6kΩ 8kΩ 10kΩ
Output Resistance 2.5kΩ 3kΩ 3.7kΩ
Load Resistance5 5MΩ
Insulation Resistance(100V)6 100MΩ

 

Pressure Range 0-40Kpa…7Mpa
Pressure
Overload
≤4Mpa 2X
7Mpa 1.5X
Pressure Media Liquids and Gases compatible with 316L Stainless Steel

Remark:
1. Best fit straight line
2. Measured at vacuum for absolute (A), ambient for gage (G)
3. Maximum temperature range for product with standard cable is -20°C to +105°C
4. Over the compensated temperature range with respect to 25°C
5. Load resistance to reduce measurement errors due to output loading
6. Between case and sensing element

PT100 Temperature vs Resistance
Temp.(℃) Resistance(Ω)
-50 80.31
0 100
50 119.4
100 138.51
150 157.33
PT100 error
Grade Resistance error at 0℃(%) Temp error(℃) TCR Error
(ohm/ohm/℃)
B ±0.12 ±(0.30+0.005 T ) 0.003851±0.000012
Model Description
AC31 Diameter 19mm O Ring mounting; Pressure combined temp. sensor
Code Power Supply
C Constant Current
V Constant Voltage
Code Pressure Range Gauge Absolute
40K 0-40Kpa *
100K 0-100Kpa * *
160K 0-160Kpa * *
400K 0-400Kpa * *
600K 0-600Kpa * *
1M 0-1Mpa * *
1.6M 0-1.6Mpa * *
2.5M 0-2.5Mpa * *
4M 0-4Mpa * *
7Mpa 0-7Mpa * *
XX Special
Code Pressure Reference
G Vent Gauge Pressure
A Absolute Pressure
S Sealed Gage
Code Electrical Connection
1 Connect Pins
2 Ribbon Cable(90mm as default)
Example: X Special
AC31 C 1M A 1 Model:AC31C-1M-A1
Dia 19mm  Current Supply 0-1Mpa Absolute Pins

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