Page 1
Signet 2250 Hydrostatic Level Sensor
*3-2250.090*
3-2250.090 Rev. 6 04/19
Description
The Signet 2250 Hydrostatic Level Sensor uses a gauge pressure sensor to calculate the
level of fl uid in a tank.
Gauge pressure sensors measure the diff erence in pressure between the process on one
side of a diaphragm and the atmospheric pressure on the opposite side of the diaphragm.
A tiny capillary tube running from inside the sensor body and up the length of the cable
provides the reference to atmospheric pressure.
Hydrostatic level measurement can be a simple and practical solution to those applications
where the fl uid temperature is stable and constant.
IMPORTANT!
This method of level measurement is not recommended if the fl uid is
subject to temperature variations or any other variable that causes the
density of the fl uid to change.
English
Product Manual
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The 2250 Hydrostatic Level Sensor has excellent chemical compatibility.
The wetted materials are PVDF, Ceramic and FKM.
Several diff erent hardware mounting kits
are available to accommodate every
installation requirement.
Table of Contents
Warranty Statement .............................................................................. 2
Product Registration ............................................................................. 2
Safety Information................................................................................. 2
Dimensions ........................................................................................... 2
Specifi cations........................................................................................ 3
Installation............................................................................................. 3
2250 Assembly Detail ........................................................................... 4
Wiring ................................................................................................. 5-6
Respanning the 4 to 20 mA Output....................................................... 7
Ordering Information ............................................................................. 8
Page 2
Warranty Information
Specifi cations
Refer to your local Georg Fischer Sales offi ce for the most
current warranty statement.
All warranty and non-warranty repairs being returned must
include a fully completed Service Form and goods must be
returned to your local GF Sales offi ce or distributor.
Product returned without a Service Form may not be
warranty replaced or repaired.
Signet products with limited shelf-life (e.g. pH, ORP, chlorine
electrodes, calibration solutions; e.g. pH buff ers, turbidity
standards or other solutions) are warranted out of box but not
warranted against any damage, due to process or application
failures (e.g. high temperature,
mishandling (e.g. broken glass,
chemical poisoning, dry-out) or
damaged membrane, freezing
and/or extreme temperatures).
Product Registration
Thank you for purchasing the Signet line of Georg Fischer
measurement products.
If you would like to register your product(s), you can now
register online in one of the following ways:
• Visit our website www.gfsignet.com.
Under Service and Support click on
Product Registration Form
• If this is a pdf manual (digital copy),
click here
Safety Information
1. Prior to installation or removal:
• Depressurize and vent system
• Drain below sensor level
2. Confi rm chemical compatibility before use.
3. Do not exceed maximum temperature/pressure
specifi cations.
4. Wear safety goggles or faceshield during installation/
service.
5. Do not alter product construction.
6. Dispose of properly; DO NOT INCINERATE!
Caution / Warning / Danger
Indicates a potential hazard. Failure to follow all warnings
may lead to equipment damage, injury, or death
Electrostatic Discharge (ESD) / Electrocution Danger
Alerts user to risk of potential damage to product by ESD,
and/or risk of potential of injury or death via electrocution.
Personal Protective Equipment (PPE)
Always utilize the most appropriate PPE during
installation and service of Signet products.
Pressurized System Warning
Sensor may be under pressure, take caution to vent
system prior to installation or removal. Failure to do so
may result in equipment damage and/or serious injury.
Hand Tighten Only
Overtightening may permanently damage product threads
and lead to failure of the retaining nut.
General
Compatibility .............................. Signet 8900 Multi-Parameter Controller
Signet 9900 Transmitter
Signet 9950 Dual Channel Transmitter
Wetted Material
Sensor housing .........................PVDF
Union nut/bushing ..................... PVC-U
Diaphragm ................................. Ceramic
Diaphragm seal ......................... FKM (optional EPDM)
Cable type .................................22 AWG, 3 conductor+capillary tube
Cable length ..............................10 m (32.8 ft) supplied
max. extension 120 m (400 ft)
Operating Temperature ............. 15 °C to 85 °C (5 °F to 185 °F)
Storage Temperature ................-20 °C to 100 °C (-4 °F to 212 °F)
Operating Pressure: .................. -XU: 0 to 0.7 bar (0 to 10 psig)
-XL: 0 to 3.4 bar (0 to 50 psig)
Electrical
Digital (S
3
L) Output
Format .......................................Serial ASCII, TTL level 9600 bps.
Accuracy .................................... ±1% of full scale (±0.001 psi)
Power ......................................... 5 VDC nominal, 1.5 mA max. current
(5 VDC min, 6.5 VDC max)
Reverse polarity and short circuit protected
4 to 20 mA Output
Factory span
-XU ............................................. 0 to 0.7 bar (0 to 10 psig) =
0 m to 7 m (0 ft to 23 ft) of water
-XL .............................................. 0 to 3.4 bar (0 to 50 psig) =
0 m to 34 m (0 ft to 115.5 ft) of water
Accuracy .................................... ± 32 μA
Resolution .................................. < 5 μA
Response Time .........................< 100 ms
Loop Power Required ............... 12 to 24 VDC nominal, 22.1 mA max
(10.8 VDC min. to 26.4 VDC max.)
Max. Loop Impedance .............. 100 Ω @ 12 V
325 Ω @ 18 V
600 Ω @ 24 V
Standards and Approvals
CE
RoHS Compliant
Manufactured under ISO 9001 for Quality, ISO 14001 for
Environmental Management and OHSAS 18001 for Occupational
Health and Safety.
China RoHS (Go to www.gfsignet.com for details)
This device complies with Part 15 of the FCC rules.
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and,
(2) This device must accept any interference received,
including interference that may cause undesired operation.
Dimensions
53 mm
(2.09 in)
½ in. (ANSI) or
25 mm (ISO)
Solvent Socket,
PVC-U
115 mm
(4.55 in)
Do Not Use Tools
Use of tool(s) may damage product beyond repair and
potentially void product warranty.
2
2250 Hydrostatic Level Sensor
34 mm
(1.32 in)
Page 3
Installation
IMPORTANT!
A tiny capillary tube inside the sensor body is used
to ensure that the back of the diaphragm remains at
atmospheric pressure.
If the capillary tube is blocked or damaged, the sensor
cannot operate properly.
• If moisture is allowed to propagate down this tube to the
rear of the diaphragm, the sensor may be damaged.
• Do not allow the cable to be bent or compressed.
• The ceramic diaphragm in the 2250 can be permanently
damaged by over-pressure conditions or by mechanical
contact.
HANDLE THESE SENSORS WITH CARE.
2250 with 4 to 20 mA or Digital (S3L) Output:
Remote Mounting
3
The 2250 can provide a digital (S
L) signal to a
8900 Multi-Parameter Controller, 9900 Transmitter or 9950
Dual Channel Transmitter.
The 2250 can provide a 4 to 20 mA signal to a PLC or to a
chart recorder.
4 to 20 mA or
3
Digital (S
L) signal out
Clamped to Tank support
PLC
4 to 20 mA or
3
Digital (S
L) signal out
Mounted through Tank Cover
PLC
Direct 4 to 20 mA output
The 2250 can be assembled as a blind 4 to 20 mA signal
connected by cable to a PLC, chart recorder or other
4 to 20 mA device.
This type of installation requires no additional hardware.
The user must provide the ¾ in. conduit to protect the cable from
damage. The 2250 cable is not suitable for direct submersion.
PLC
4 to 20 mA
3-2250-2xx-x
Direct Digital output
The 2250 can be assembled as a digital sensor connected
directly to a Signet 8900 Multi-Parameter Controller, a Signet
9900 Transmitter or Signet 9950 Dual Channel Transmitter
C1 2.50 μS/cm
L2 58.43 M
Multi-Parameter
Controller
Relay 1
Relay 2
ENTER
3-8900
3-8052-1
¾ in. conduit
(customer supplied)
3-2250-xx
4 to 20 mA Out
OR
3
Digital (S
3-8900
3-9900
3-9950
C1 2.50 μS/cm
L2 58.43 M
L)
Multi-Parameter
Controller
Relay 1
Relay 2
ENTER
ENTER
4
FT
25.0
CH1
LEVEL
10.000
0.0000
FT
42.0
CH2
LEVEL
10.000
0.0000
ENTER
3-8050-1
¾ in. conduit
(customer supplied)
3-2250-xx
4 to 20 mA Out
OR
3
Digital (S
3-8900
3-9900
3-9950
L)
2250 with Digital Output: Integral mounting
The 2250 can be assembled as an integral system, with the
3-9900-1 Transmitter mounted directly atop the sensor. This
confi guration provides a local display at the measurement site,
plus the 4 to 20 mA and open-collector output features of the
9900 Transmitter.
Integral Transmitter
Clamped to Tank support
3-9900-1
3-8052
¾ in. conduit
(customer supplied)
ENTER
4 to 20 mA Out
AND
Control Relay Out
PLC
C
Integral Transmitter
Mounted through Tank Cover
3-9900-1
NC
NO
(customer supplied)
3-8050
¾ in. conduit
ENTER
4 to 20 mA Out
AND
Control Relay Out
C1 2.50 μS/cm
L2 58.43 M
Multi-Parameter
Relay 1
CH1
LEVEL
0.0000
CH2
LEVEL
0.0000
PLC
C
Controller
Relay 2
ENTER
ENTER
4
FT
25.0
10.000
FT
42.0
10.000
ENTER
NC
NO
Digital (S
3
L)
3-2250-1xx-x
3-9900
25.0
CH1
LEVEL
0.0000
42.0
CH2
LEVEL
0.0000
3-9950
3-2250-X
ENTER
4
FT
10.000
FT
10.000
ENTER
2250 Hydrostatic Level Sensor
3-2250-XX
3
Page 4
2250 Assembly Detail
Glue the union bushing onto
the conduit.
1.
Thread the sensor cable
through the O-ring, Union and
2.
through the ¾ in. conduit.
Thread the Union nut onto
the Union bushing.
3.
6A.
Remote system
Cut the cable to length and
terminate the wires at the
terminal block inside the
conduit base.
CAUTION
The capillary tube that runs
the length of the sensor
cable must remain open to
the atmosphere. Do not allow
it to be crimped or blocked.
PLC
4 to 20 mA Out
OR
C1 2.50 μS/cm
L2 58.43 M
Multi-Parameter
Controller
Relay 1
Relay 2
ENTER
Digital (S
3
L)
3-8900
3-9900
ENTER
25.0
CH1
LEVEL
0.0000
42.0
CH2
LEVEL
0.0000
3-9950
4
FT
10.000
FT
10.000
ENTER
CAUTION
Hand tighten the nut. Do not
use tools.
Thread the ¾ in. conduit
adapter or the universal
4.
adapter onto the top of the
conduit. Use a suitable
thread sealant to provide a
watertight connection.
Mount the conduit base onto
the adapter and secure the
5.
assembly with the locking ring.
6B.
Integral system
Cut the cable to length and terminate
the wires at the terminal block of a
fi eld-mounted 9900-1 Transmitter.
CAUTION
The capillary tube that runs the
length of the sensor cable must
remain open to the atmosphere.
Do not allow it to be crimped or
blocked.
4 to 20 mA Out
AND
PLC
NC
C
Control Relay Out
4
2250 Hydrostatic Level Sensor
NO
Page 5
Wiring
Digital (S3L) wiring
• 3-2250-11X-X options provide Digital (S3L) output when powered with 5 VDC from a 9900 Transmitter, a 9950 Dual Channel
Transmitter or a 8900 Multi-Parameter Controller.
• Connecting the SHIELD to a direct Earth ground may reduce electrical noise interference.
• The maximum Digital (S
instrument manual for details.
3-2250-11X-X to 8900 Multi-Parameter Controller
Digital (S3L) Sensors
3-2250-11U
3-2250-11L
3-2250-11U-1
3-2250-11L-1
3
L) cable length is dependent upon the instrument to which the sensor is connected. Consult the
I/O Module 3-8900.401-X
Frequency
Frequency
Input 2
Input
S3L
Input
+5VDC (Black)
Input
Freq. Input (Red)
1
+5VDC (Black)
Freq. Input 2 (Red)
OR
S3L
2
GND (White/Shield)
+5VDC (Black)
1
GND (White/Shield)
Analog Output 1
(if applicable)
Analog Output 2
(if applicable)
GND (Shield)
3
S L (Red)
3
S L (Red)
3-8900.621C
1
2
3
4
5
6
7
8
9
10
11
+
12
-
13
+
14
-
Black
White
Lvl1 4.20 m
Lvl2 8.53 m
Multi-Parameter
Controller
Relay 1
Red
Relay 2
ENTER
Shield
Optional
Earth ground
3-2250-11X-X to 9900 Transmitter
Digital (S3L) Sensors
3-2250-11U
3-2250-11L
3-2250-11U-1
3-2250-11L-1
3-2250-11X-X to 9950 Dual channel Transmitter
Digital (S3L) Sensors
3-2250-11U
3-2250-11L
3-2250-11U-1
3-2250-11L-1
V+
DATA
GND
9950 S3L Inputs
Loop
Loop
FREQ
DATA
GND
CH2 CH1
FREQ
SHLD
DC POWER
+V
+V
White
Black
+V
no connection
X
DATA
GND
CH1
LEVEL
0.0000
CH2
LEVEL
0.0000
Shield
Red
25.0
42.0
Black
Red
White
Shield
ENTER
10.000
10.000
4
FT
FT
ENTER
2250 Hydrostatic Level Sensor
5
Page 6
Wiring
4 to 20 mA Loop Wiring
• The 3-2250-21X-X models provide a 4 to 20 mA loop output when powered with 12 to 24 VDC.
• Connecting the SHIELD to a direct Earth ground may reduce electrical noise interference.
4 to 20 mA Sensors
3-2250-21U
3-2250-21L
3-2250-21U-1
3-2250-21L-1
4 to 20 mA Span
The 2250 is available in two factory-set span ranges:
• Models numbers ending with "U" or "U-1" have a factory span of 0 to 10 psig.
• Model numbers ending in "L" or "L-1" are spanned for 0 to 50 psig.
The chart below lists the factory span of all available models.
The level ranges in meters and feet are based on the mass of water.
Black (Loop +)
Red (no connection)
White (Loop -)
Cable shield
Optional Earth ground
• Programmable Logic
Controller (PLC)
• 4 to 20 mA Loop Monitor
• Chart Recorder
• Datalogger
+
-
Power Supply
+
DC 12 - 24 V
-
Mfr. Part No. Code 4 to 20 mA Span
3-2250-21U 159 001 248 0 to 0.7 bar (0 to 10 psig) 0 m to 7 m (0 ft to 23.09 ft)
3-2250-21L 159 001 247 0 to 3.4 bar (0 to 50 psig) 0 m to 34 m (0 ft to 115.5 ft)
3-2250-21U-1 159 001 482 0 to 0.7 bar (0 to 10 psig) 0 m to 7 m (0 ft to 23.09 ft)
3-2250-21L-1 159 001 483 0 to 3.4 bar (0 to 50 psig) 0 m to 34 m (0 ft to 115.5 ft)
6
2250 Hydrostatic Level Sensor
Page 7
Respanning the 4 to 20 mA Output
• The 4 to 20 mA span can be set to accommodate any application within the operating range of the sensor.
• The respanning procedure requires that the sensor be subjected to the actual pressure that will represent 4 mA and 20 mA.
• The procedure illustrated here assumes that the application requires that the sensor output is 4 mA when the tank is empty
and 20 mA
when the tank is full. To reverse the range, reverse steps 3 and 5.
WARNING!
Not protecting the red wire may cause the 4 to 20 mA
span to be reset.
Wire Nut
1. 2.
Install the sensor.
3.
= 4 mA
Fill tank to the level
represented by 4 mA.
4.
Black (Loop +)
Red (no connection)
White (Loop -)
Programmable
Logic Controller
4 to 20 mA loop monitor
Chart Recorder
Datalogger
Wire the 4-20 mA Loop and turn the power ON.
Black (Loop +)
Red (no connection)
White (Loop -)
Programmable
Logic Controller
4 to 20 mA loop monitor
Chart Recorder
Datalogger
Carefully remove the heat shrink tube that is
protecting the red wire.
Short the RED and WHITE wires together for
15 seconds. mA should go to 3 to 6 mA
Disconnect red wire
+
Power Supply
DC 12 - 24 V
-
+
-
+
Power Supply
DC 12 - 24 V
-
+
-
15s
= 20 mA
Fill the tank to the level to be
represented by 20 mA.
6.5.
Short the RED and BLACK wires together for 15 seconds.
mA should go to 22 mA
Disconnect red wire
After adjusting the 4 to 20 mA span, protect the red wire by
installing the provided wire nut.
For easier re-spanning use the Signet 0252 Diagnostic Tool.
Black (Loop +)
Red (no connection)
White (Loop -)
Programmable
Logic Controller
4-20 mA loop monitor
Chart Recorder
Datalogger
+
Power Supply
DC 12 - 24 V
-
+
-
15s
2250 Hydrostatic Level Sensor
7
Page 8
Ordering Information
2250 Hydrostatic Level Sensor
Mfr. Part No. Code Description
3
3-2250-11U 159 001 242 0 to 0.7 bar (0 to 10 psi), Digital (S
3-2250-11L 159 001 241 0 to 3.4 bar (0 to 50 psi), Digital (S
3-2250-21U 159 001 248 0 to 0.7 bar (0 to 10 psi), 4 to 20 mA, ½ in. union, ¾ in. PVC-U Union
3-2250-21L 159 001 247 0 to 3.4 bar (0 to 50 psi), 4 to 20 mA, ½ in. union, ¾ in. PVC-U Union
3-2250-11U-1 159 001 478 0 to 0.7 bar (0 to 10 psi), Digital (S
3-2250-11L-1 159 001 479 0 to 3.4 bar (0 to 50 psi), Digital (S3L), ½ in. union, Metric PVC-U Union
3-2250-21U-1 159 001 482 0 to 0.7 bar (0 to 10 psi), 4 to 20 mA, ½ in. union, Metric PVC-U Union
3-2250-21L-1 159 001 483 0 to 3.4 bar (0 to 50 psi), 4 to 20 mA, ½ in. union, Metric PVC-U Union
Accessories and Replacement Parts
Mfr. Part No. Code Description
5523-0322 159 000 761 Sensor cable (per ft.). 3 conductor plus shield, 22 AWG (black/red/white/shield)
3-9000.392-1 159 000 839 Liquid tight connector kit, NPT (1 pc.)
3-9000.392-2 159 000 841 Liquid tight connector kit, PG 13.5 (1 pc.)
3-8050 159 000 184 Universal mount kit
3-8052 159 000 188 ¾ in. Integral mount kit
3-8050-1 159 000 753 Universal Mount w/Junction terminals
3-8052-1 159 000 755 ¾ in. Integral mount w/Junction terminals
3-0252 159 001 808 0252 Confi gurationTool
L), ½ in. union, ¾ in. PVC-U Union
3
L), ½ in. union, ¾ in. PVC-U Union
3
L), ½ in. union, Metric PVC-U Union
Georg Fischer Signet LLC, 3401 Aero Jet Avenue, El Monte, CA 91731-2882 U.S.A. • Tel. (626) 571-2770 • Fax (626) 573-2057
For Worldwide Sales and Service, visit our website: www.gfsignet.com • Or call (in the U.S.): (800) 854-4090
For the most up-to-date information, please refer to our website at www.gfsignet.com
3-2250.090 Rev. 6 04/19 English © Georg Fischer Signet LLC 2019
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