PRESSURE TRANSDUCERS

830 Series – Wet/Wet Differential
Pressure TransducerNew!

 Liquid Media on Both Ports Bleed Screws for Accurate Results
 Optional Manifold for Easy Installation
The 830 Series is designed for wet-to-wet differential pressure measurements ofliquids or gases. They feature fast-response capacitance sensors that respond
approximately 20x faster than conventional fluid-filled transducers! Sensors arecoupled to signal conditioned electronic circuitry for highly accurate, linear analogue
output proportional to pressure. Both unidirectional and bidirectional models areavailable for line pressures up to 250 psi. These units feature bleed ports that allow
for total elimination of air in the line and pressure cavities.

Common Specifications
Input
Pressure Range
0 to 100 psid
Proof Pressure
see ordering chart
Burst Pressure
see ordering chart
Common Line Pressure<250 psia
Fatigue Life
>1 Million Cycles
Performance
Supply Voltage (Vs)
9-30 VDC (13-30 VDC for 10 VDC output)
Long Term Drift
0.5% FS/year
Accuracy
0.25% FS
Thermal Error Zero
0.02% FS/°F (0.036% FS/°C)
Thermal Error Span
0.02% FS/°F (0.036% FS/°C)
Compensated Temperatures 30°F to 150°F (-1°C to +65°C)
Operating Temperatures
0°F to 175°F (-18°C to +80°C)
Storage Temperatures-65°F to +250°F (-54°C to +121°C)
Zero Tolerance
0.5% FS
Span Tolerance
0.5% FS
Mechanical Configuration
Pressure Portsee ordering chart
Wetted Parts
17-4 PH Stainless Steel, 300 Series SS, Viton and Silicone
Electrical Connection
7/8˝ Knock Out for 1/2˝ Conduit, Screw Terminal Strip
Enclosure
Stainless Steel, Aluminum
Vibration
5g Peak Sinusoidal, 5 to 500 HzAcceleration
10g
Shock50g
Approvals
CEWeight
15 oz

Individual Specifications
Voltage Output Units
OutputMin. Load Resistance
Current Output Units
OutputMax. Loop Resistance

0-5 VDC or 0-10 VDC (3 wire)
5000K ohms
4-20 mA (2 wire)(Vs-9) x 50 ohms

3-Valve Manifold AssemblyGems optional 3-valve manifold assembly eases
installation and maintenance.

Applications• Energy Management Systems• Process Control Systems• Liquid & Gas Flow Measurement• Filter Monitoring• Liquid Level Measurement

How They Operate
A unique isolation system transmits the motion of thedifferential pressure sensing diaphragm from the highline pressure environment to the dry enclosure where it
moves one of a pair of capacitance plates proportionallyto the diaphragm movement. Electronic circuitry
linearizes output vs. pressure and compensates forthermal effects of the sensor.

G-28

www.gemssensors.com

CAPACITANCE TYPE
Dimensions

2.00
51

1.50
38

3.00
76

1.94
49

3.05
77

2.50
64
0.43
11

BLEED
SCREWS

1/4˝-18 NPTHIGH PRESSURE
PORT

0.875 DIA. CONDUIT
22OPENING

1/4˝-18 NPT
LOW PRESSURE
PORT

2.4462

1.63
41

1.00
25

NOTCHED FOR
CLAMP MOUNTING

0.88
221.3033

TRANSDUCERMOUNTING HOLES
1.63
41
7.05
179

Gems optional 3-valve manifold assembly eases installation and maintenance.
Machined of brass, it eliminates internal pipe connections and the associated chanceof internal leaks. When manifold and 830 Series transducer are ordered together, they
are assembled at the factory and shipped ready for mounting. Specify the 3V Pressure
Port code when ordering.

2.33
59

4.00
102

830 Series

360 Brass, Copper 122, Acetal plug valves, andNitrile O-rings
90-degree on/off
1/4˝ NPTF
7.05˝ x 6.25˝ x 2.16˝ D
2.5 lbsValve Type
Process Connections
Dimensions
Weight0.52
130.156
DIA.
4.0

3-Valve Manifold

Wetted Parts

{

7.83
199
V3V1

5.63
143

PRESSURE TRANSDUCERS

2.15
55

5.80
147

V20.156
40.38
10

How to Order

3.25
83

0.31
8Use the bold characters from the chart below to construct a product code
Valve Schematic
SELECT

8301 025PD

2F

11B

X

830 SERIESDIFFERENTIAL PRESSURE
TRANSDUCER

1. Series
8301 - 830 Series

V3

SHUNT
VALVE

2. Pressure Range Code
Unidirectional
psid Ranges

Proof Pressure – psiHigh Low
Side Side Burst

001PD - 0-1002PD - 0-2005PD - 0-5010PD - 0-10025PD - 0-25030PD - 0-30050PD - 0-50
100PD - 0-100

202.5 200405.0 200
100 12.5 600
100 25.0 1000
250 62.5 1000
250 62.5 1000
250 125.0 1000
250 250.0 1000

Bidirectional
psid Ranges

Proof Pressure – psiHigh Low
Side Side Burst

0R5PB - ±0.5001PB - ±1
2R5PB - ±2.5005PB - ±5010PB - ±10025PB - ±25050PB - ±50

201.25402.501006.25
100 12.50
200 25.00
250 62.50
250 125.00

200200600
1000
1000
1000
1000

V1HIGH PROCESSCONNECTION 1/4˝ NPTV2SHUT-OFF
VALVESLOW PROCESSCONNECTION 1/4˝ NPT

3. Pressure Port
2F - 1/4˝ NPTF
3V - 3-Valve Manifold Assembly Installed
4. Output
11 - 4-20 mA
2D - 0-5 Vdc
2E - 0-10 Vdc
5. Bleed Screw Seals
B - Viton/Silicon Standard
A - Buna-N Optional
6. Optional
C - Calibration Certificate
www.gemssensors.com

G-29