3820 Series –
Pressure Transmitter with 30V Switching
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
FM
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.
C
US
APPROVED
Specifications
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
Compensated
Ambient
Process
Storage
Electrical
Supply Voltage
Output
Loop Resistance
Circuit Protection
Connection
Conduit Size
Termination
Mechanical Configuration
Wetted Parts
Enclosure
Approvals
Weight
0 to 10,000 psi
3x FSPR
2x FSPR
±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)
40x FSPR
20x FSPR
10x FSPR
8x FSPR
4x FSPR
≤±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
1/2˝ 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)
Dimensions
1/2˝ MNPT with 1/4˝ FNPT
ELECTRICAL CABLE
ELECTRICAL CONNECTION
1/2˝ MNPT
1-1/8˝ FLATS
EXTERNAL GROUND
PROVISION
6-3/32
(154.8)
1-11/32
(34.1)
1-1/8˝ HEX
PROCESS CONNECTIONS
1/2˝ MNPT
1/4˝ FNPT
PRESSURE TRANSDUCERS
H-56
Flush Mount – 1/2˝ MNPT
ELECTRICAL CABLE
ELECTRICAL CONNECTION
1/2˝ NPTM
1-1/8 (28.6) FLATS
EXTERNAL GROUND
PROVISION
5-9/32
(134.1)
1-11/32
(34.1)
1 (25.4)
FLUSH FACE
PROCESS CONNECTION
WITH 1/2˝ MNPT
0.5 (12.7)
inch
(mm)
Visit www.GemsSensors.com for most current information.
3820 Series / p1of2 / 18-MAR-15
HAZARDOUS LOCATIONS
Switch Operation
Window Mode (WM)
Switch is closed when the process pressure is
within the user selected range (LO and HI set
points), and open when the pressure is above
or below the range.
100%
Switch
Open
HI SET POINT
(±2%)
Switch
Closed
LO SET POINT
(±2%)
100%
100%
Switch
Open
Switch
HI SET
Closed POINT
(±2%)
Switch
Closed
LO SET POINT
(±2%)
(±2%)
Close on Rise/Open on Fall (CR)
Switch is open when the process pressure is
below the user selected set point and closed
when the pressure is above that set point.
100%
100%
100%
Switch
Switch
OpenOpen
Switch
HI SET POINT
SET
Closed POINT
(±2%)
(±2%)
Switch
Closed
LO SET POINT
Switch
(±2%)
(±2%)
Closed
Switch
Switch
Open
Open
0%0%
0%
0%
0%
100%
100%
Open on Rise/Close on Fall (OR)
Switch is closed when the process pressure
is below the user selected set point and open
when the pressure is above that set point.
100%
Switch
Open
Switch
SET
Closed POINT
(±2%)
Switch
Open
SET POINT
(±2%)
SET POINT
Switch
(±2%)
Closed
Switch
Open
0%
Switch
Closed
Switch
Open
0%
0%0%
Switch
Switch
Open
Open
Agency Approvals
Approved*
Safety Method
Explosion Proof
Hazardous Locations
Non-incendive
Flameproof
Approval
Class I, II, III; Division 1
Groups A-G; T5; Type 4X
Class I, II, III; Division 2
Groups A-G; T5; Type 4X
II 2 G Ex d IIC T5
IP 66
FM
(U.S. and Canada)
ATEX
* Product holds a Canadian Registration Number (CRN) in all provinces.
How to Order
Use the
bold
characters from the chart below to construct a product code.
SELECT
Series
3820
- 3820 Series
Output
C
- 4-20 mA
V
- 1-5 VDC
Range
03
- 0-100 psi (0-6.9 bar)
04
- 0-250 psi (0-17.2 bar)
05
- 0-500 psi (0-34.5 bar)
06
- 0-1,000 psi (0-68.9 bar)
07
- 0-2,500 psi (0-172.4 bar)
08
- 0-5,000 psi (0-344.7 bar)
09
- 0-10,000 psi (0-689.5 bar)
Process Connection Size
A
- 1/2˝ MNPT with 1/4˝ FNPT
S
- 1/2˝ MNPT Flush Mount, only for
range 250-5,000 psi
Note:
1. Set Point must be within your Pressure Range.
2. Dual Seal version is not hermetically sealed.
3820 - C
07 - A - UC - RR - FS_____ - WM
Switch Operation
WM
- Window Mode
CR
- Close on Rise/Open on Fall
OR
- Open on Rise/Close on Fall
Fixed Set Point
FS
- Specify set point (in PSI or BAR, see example)
1
Example:
FS60PSI
for 60 PSI or
FS3BAR
for 3 BAR
Accessories
BB
- Cleaned for industrial oxygen service
C1
- Calibration Certificate
DS
- Dual Seal approval (FM)
2
PK
- Pipe mounting kit
RR
- SS tag wired to housing with customer specified
information
Approvals
UC
- FM Approval (North, Central, and South America)
(blank)
- FM and ATEX Approval (Europe and U.K.)
For field adjustability, a Calibration Kit is required. Calibration Kit includes hardware
and software. Contact Gems for additional information. P/N 9231503
Visit www.GemsSensors.com for most current information.
3820 Series / p2of2 / 18-MAR-15
H-57
PRESSURE TRANSDUCERS