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
* 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
* Process control
* Medical instruments
* Pressure/Temperature transmitters
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)4 | ±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 | |||
