PRESSURE TRANSDUCERS

856 Series –Industrial Pressure Transducers
 0-2 to 0-10,000 psi Pressure Ranges
 Voltage or Current Output
 NEMA 4/IP65 with Zero and Span Adjustments
The 856 Series is specifically designed for NEMA4/IP65 service and features a diecast aluminum enclosure. Their robust capacitive design is resistant to environmental
effects, such as shock, vibration, temperature and EMI/RFI. A 17-4 PH stainless steel
sensing element does not require isolation from corrosive media. A 1/2˝ threaded
conduit is provided for electrical termination and a removable cover provides easy
access to the internal wiring terminal strip.

Common Specifications
Input
Pressure Range
0 to 10,000 psig (0 to 700 bar)
Proof Pressure
See ordering chart
Burst Pressure
See ordering chart
Fatigue Life
>1 million cycles
Performance
Supply Voltage (Vs)
9-30 VDCLong Term Drift
0.5% FS/year
Accuracy<25 psi±0.25% FS≥25 psi±0.13% FS
Thermal Error Zero
<25 psi±0.02% FS/°F (±0.036% FS/°C)≥25 psi±0.01% FS/°F (±0.018% FS/°C)
Thermal Error Span
±0.015% FS/°F (±0.027% FS/°C)Compensated Temperatures -4°F to +176°F (-20°C to +80°C)
Operating Temperatures-40°F to +260°F (-40°C to +125°C)
Storage Temperatures-40°F to +260°F (-40°C to +125°C)
Zero Tolerance
0.5% of span (adjustable)
Span Tolerance
1% of span (adjustable)
Mechanical Configuration
Pressure Portsee ordering chart
Wetted Parts
17-4 PH Stainless SteelElectrical Connection
Two 1/2˝ Internal Threaded Ports, Screw Terminal Strip
Enclosure
Die-Cast Aluminum, NEMA 4/IP65
Vibration
20g (MIL STD 202, Method 204, Condition C)
Shock
200g (MIL STD 202, Method 213B, Condition C)
Approvals
CEWeight
13.4 oz

Individual Specifications
Voltage Output Units
OutputCurrent Consumption
Min. Load Resistance
Current Output Units
OutputMax. Loop Resistance

G-30

New!

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0.1-5.1 VDC (3 wire)
6 mA
5000 ohms
4-20 mA (2 wire)(Vs-9) x 50 ohms

Applications• Process Control• Chemical Processing• Agricultural Irrigation• Natural Gas Pipeline• Grain Processing• Industrial Pressure Monitoring

How They OperateGems’ patented variable capacitance sensor features aninsulated electrode plate fastened to the center of thesensor diaphragm, which forms a variable capacitor.
As pressure increases or decreases, the capacitancechanges. This change in capacitance is detected andconverted to a linear analog signal by Gems’ custom
ASIC-based circuit, producing an output signal
proportional to applied pressure.

CAPACITANCE TYPE
Dimensions

PRESSURE TRANSDUCERS

+OUT

-OUT

GND

-EXC+EXC

4.02
102

SZ

0.38
9
2.50 DIA.
64
1/2˝-14 NPT
5 TURNS MIN.
2.54
65

1.46
37

3.56
90
1/4˝ NPT

2.0051

How to OrderUse the bold characters from the chart below to construct a product code.
SELECT

8561 - 025P - G - 4M - 11 - C

1. Series
8561 - 856 Series

6. Optional
C - Calibration Certificate

2. Pressure Range Code

5. Output
11 - 4-20 mA
22 - 0.1-5.1 Vdc (≥25 psi ranges)

Pressures – psi
CodeRange

Pressures – bar

Proof

Burst

Code Range Proof Burst

002P 0 - 24250

1R6B 0 - 1.6640005P 0 - 510250004B 0 - 41050010P 0 - 1020500006B 0 - 61860015P 0 - 1530500010B 0 - 103080500016B 0 - 1632130025P 0 - 25100050P 0 - 50

150

750

025B 0 - 2550

170

100P 0 - 100

300

1000

040B 0 - 40

80

240

150P 0 - 150

300

1000

060B 0 - 60

120300200P 0 - 200

450

2000

100B 0 - 100

200

400

250P 0 - 250

500

2000

160B 0 - 160

320

500

500P 0 - 500

1000

3000

250B 0 - 250

380

550

600

800

800

1350

600P 0 - 600

1200

3000

400B 0 - 400

10CP 0 - 1000

2000

5000

700B 0 - 700

30CP 0 - 3000

4500

7500

50CP 0 - 5000

7500 10000

4. Pressure Port
2M - 1/4˝ NPT (M)
4M - 1/2˝ NPT (M) (≥25 psi ranges)
2F - 1/4˝ NPTF (≥25 psi ranges)
1M - 1/8˝ NPTM (<25 psi ranges)
3. Pressure Datum
G - Gauge (standard)

10KP 0 - 10000 12000 12500

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G-31