Gems Model 3820 Series OEM Pressure Switch0 pages

3820 Series –
Pressure Transmitter with 30V Switching
t
t
t
t
t
t
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Combines Continuous Output with Adjustable Set Point Switch
FM and ATEX Approvals for Hazardous Locations
Field Adjustable – 5:1 Turndown
Compact, 316 Stainless Steel, Hermetically Sealed Enclosure
Stainless Steel Sensor, No O-Ring
Dual Seal Approval
Flush Mount Option Available

The 3820 Pressure Transmitter is a compact loop-powered (4-20 mA) transmitter,
with a low power 1-5 VDC option also available. These are the same as our 3800
Series with the addition of an integrated 30V/120mA switch. The switch setpoint is
specified at time of order for factory setting, yet may be also field adjusted using the
Gems Calibration Kit (that will also adjust the zero and span points of the transmitter).
3820 Series Pressure Transmitters are suitable for hazardous locations and
hostile environments, and are ideal for applications where dependable, continuous
monitoring is required. A rugged construction makes cost of ownership low and they
carry a three-year warranty.

FM

C
US
APPROVED

Specifications

PRESSURE TRANSDUCERS

Pressure Range
Over Pressure
0-100 psi
Up to 10,000 psi
Primary Switch Output
Accuracy
Type
Electrical Rating
Temperature Effect
Burst Pressure
0-100 thru 0-250 psi
0-500 thru 0-1,000 psi
0-2,500 psi
0-5,000 psi
0-10,000 psi
Continuous Output
Long Term Stability
Accuracy
Response Time
Turndown
Temperature Ranges
tCompensated
tAmbient
tProcess
tStorage
Electrical
Supply Voltage
Output
Loop Resistance
Circuit Protection
Connection
tConduit Size
tTermination
Mechanical Configuration
Wetted Parts
Enclosure
Approvals
Weight

0 to 10,000 psi

Dimensions

3x FSPR
2x FSPR

1/2˝ MNPT with 1/4˝ FNPT
ELECTRICAL CABLE

±2% URL
Normally Open Solid-State Relay
30V, 120 mA
±2% URL/100°F (38°C) @ -40°F to +176°F (-40°C to +80°C)

ELECTRICAL CONNECTION
1/2˝ MNPT
1-1/8˝ FLATS

40x FSPR
20x FSPR
10x FSPR
8x FSPR
4x FSPR

EXTERNAL GROUND
PROVISION
6-3/32
(154.8)

≤±0.5% URL/year
±0.25% URL (BFSL) Linearity, Hysteresis and Repeatability
≤5 ms
5:1 (2:1 for 100 psi range)
-40°F to +176°F (-40°C to +80°C)
-40°F to +176°F (-40°C to +80°C)
-40°F to +194°F (-40°C to +90°C)
-40°F to +194°F (-40°C to +90°C)
8-30 VDC
4-20 mA or 1-5 VDC (27 mW ± 5 mW @ 9 VDC)
800 Ohms @ 24 VDC
Reverse polarity and EMI/RFI protected

1-11/32
(34.1)
1-1/8˝ HEX
PROCESS CONNECTIONS
1/2˝ MNPT
1/4˝ FNPT

Flush Mount – 1/2˝ MNPT
ELECTRICAL CABLE

ELECTRICAL CONNECTION
1/2˝ NPTM

1/2˝ MNPT
18 AWG shielded cable, 6-feet (1.8 m)
17-4 PH Stainless Steel
316 Stainless Steel (CF8M)
FM, ATEX, CE
1.8 lbs. (0.8 kg)

1-1/8 (28.6) FLATS
EXTERNAL GROUND
PROVISION

1-11/32
(34.1)

1 (25.4)
FLUSH FACE
PROCESS CONNECTION
WITH 1/2˝ MNPT

H-56

Visit www.GemsSensors.com for most current information.

5-9/32
(134.1)

0.5 (12.7)

inch
(mm)

3820 Series / p1of2 / 18-MAR-15