Georg Fischer 2819-2823 Specifications

Signet 2818-2823 Conductivity/Resistivity Electrodes

2818

2819

in-line only

2820

2821

2822

2823

Reversible
threads for
in-line or
submersible
installation.

Sanitary

Sanitary
tri-clamp
flange version.

Signet 2818-2823 Conductivity/Resistivity Electrodes
are designed to provide versatile installation and
accurate sensing across a very broad dynamic range.
These electrodes are built with a controlled surface
finish to ensure accuracy and repeatability. The
standard electrode is constructed 316 SS or Titanium,
but there are other materials available for maximum
chemical compatibility.

Reversible threads or sanitary flanges allow for
maximum installation versatility. Sanitary flange
versions are available with surface quality finish of
less than RA 25 and with an optional NIST Traceability
Certificate to meet USP requirements. Coupled with
Signet patented measuring circuitry, a three decade
measurement range is achieved without the need for
troublesome electrode platinization. A platinum RTD
(PT1000) located within the electrode allows optimal
temperature sensing.

Features

• Standard process connections

- ¾ in. NPT Polypro

- ¾ in. NPT SS on 10 and 20 cell

- Tri-clamp 1 -1½ in., 2”

- Opt. ½ in. NPT 316 SS

• 316 SS or Titanium standard electrode

• Alternative electrode materials available

- Hastelloy-C

- Monel

- Titanium

• In-line or submersible mounting

• NIST traceable certified cells ±1% meet USP
requirements

Applications

• Pure Water Treatment

- Reverse Osmosis

- Deionization

- Distillation

• Boiler Condensate

• Semiconductor Water Production

• Rinse Water Monitoring and Control

• Chemical Concentrations

• Cleaner and Degreaser Concentrations

• TDS (Total Dissolved Solids)

• Salinity

• USP Purified Water

• WFI Water Production

• Ultra Pure Water

Specifications

Models 3-2818-1( 0.01 cm-1 Cell), 3-2819-1* (0.01 cm-1 Cell), 3-2820-1* (0.1 cm

* Certified versions available (add “C” suffix to part no.)

General

Operating Range 3-2818, 3-2819 0.055 to 100 μS

3-2820 1 to 1000 μS

3-2821 10 to 10,000 μS 5 to 5,000 ppm

Cell Constant Accuracy ±2% of reading (certified cells ±1%)

Temperature Compensation Device PT1000

Cable Length
(use for the 2818,
19, 20, 21, 22 and

23)

3-2818, 3-2819-1 sensors 7.6 m (25 ft) max. when used with 8850, 8860. No splicing of cable.

Call factory for special order sensor

standard 4.6 m (15 ft)

maximum 30 m (100 ft) all other sensors (except 2818 and 2819 max. 7.6 m (25 ft)

Wetted Materials

O-rings EPR (EPDM)

Insulator Material Carbon fiber reinforced PTFE

Electrodes 316L stainless steel (1.4408, DIN 17440) or Titanium

Max. Temperature/Pressure Rating

Standard Polypro Fitting

Optional 1/2: NPT 316 SS fitting (3-2820.392)

Sanitary Connection

6.9 bar @ 100 °C 100 psi @ 212 °F

13.8 bar@ 120 °C 200 psi @ 248 °F

6.9 bar@ 120 °C 100 psi @ 248 °F

Temperature Response, 

0.01 cell 7 sec.

0.1 cell 53 sec.

1.0 cell 21 sec.

Temperature Accuracy 0.3 °C

Shipping Weight

0.4 kg 0.8 lb

Standards and Approvals

RoHS compliant, China RoHS

Model 3-2822-1 (10.0 cm

-1

Cell)

General

Operating Range 100 to 200,000 μS 50 to 100,000 ppm

Cell Constant Accuracy ±2% of reading (certified cells ±1%)

Temperature Compensation Device PT1000

Cable Length standard 4.6 m 15 ft

maximum 30 m 100 ft

Wetted Materials

O-rings EPR (EPDM)

Body CPVC

Electrodes 316 stainless steel (1.4408, DIN 17440)

Process Connection Standard 316 SS fitting ¾ in. NPT threads

Optional 316 SS submersion
adapter fitting (3-2820.390)

Max. Temperature/Pressure Rating

6.9 bar @ 95 °C 100 psi @ 203 °F

Temp. Response,  5 seconds

Temp. Accuracy 0.3 °C

Shipping Weight

0.4 kg 0.8 lb

Standards and Approvals

RoHS compliant, China RoHS

-1

Cell), Models 3-2821-1* (1.0 cm

18.2 MΩ to 10 KΩ

1 MΩ to 1 KΩ

¾ in. NPT threads

-1

Cell)

0.02 to 50 ppm

0.5 to 500 ppm

www.gfsignet.com

Model 3-2823-1 (20.0 cm-1 Cell)

General

Operating Range 200 to 400,000 μS 100 to 200,000 ppm

Cell Constant Accuracy ±2% of reading

Temperature Compensation Device PT1000

Cable Length standard 4.6 m/15 ft

maximum 30 m/100 ft

Wetted Materials

O-rings EPR (EPDM)

Insulator Material PEEK™

Process Connection Electrodes 316 stainless steel (1.4408, DIN 17440)

Standard 316 SS fitting ¾ in. NPT thread

Max. Temperature/Pressure Rating

6.9 bar @ 150 °C 100 psi@ 302 °F

Temp. Response,  120 seconds

Temp. Accuracy ±0.3 °C

Shipping Weight

0.3 kg 0.6 lb

Standards and Approvals

RoHS compliant, China RoHS

See Temperature and Pressure graphs for more information.

Dimensions

32.39 mm
(1.28 in.)

2818

73.66 mm
(2.9 in.)

41.91 mm
(1.65 in.)

12.7 mm
(0.50 in.)

4.6 m (15 ft)

cable (standard)

203 mm
(8.0 in.)

89 mm
(3½ in.)

2823

2819, 2820, 2821

4.6 m (15 ft)
cable (std)

152 mm
(6 in.)

107 mm
(4.2 in.)

49.5 mm
(1.95 in.)

12.7 mm
(0.5 in.)

Reversible
fitting assy
for submersion
mounting

¾ in. NPT

76.2 mm
(3.0 in.)

¾ in. NPT

2820-x
sensor tip
(nosepiece)

20.3 mm
(0.8 in.)

2821-x
sensor tip
(nosepiece)

7.6 mm
(0.3 in.)

152 mm

(6.0 in.)

126 mm

(5.0 in.)

Sanitary

2822

4.6 m (15 ft.)
cable (std.)

147 mm
(5.8 in.)

86 mm
(3.4 in.)

19 mm
(0.75 in.)

T1 = 50 mm (2.0 in.)
T2 = 64 mm (2.5 in.)

¾ in. NPT

Optional 316 SS

submersion fitting

kit #3-2820.390

¾ in. NPT

58.4 mm
(2.3 in.)

Note
Tri-clamp is available for 2819,
2820, 2821 only. T1 or S1 is for 1 to
1½ in. tees or flanges.
T2 or S2 is for 2 in. tees or flanges.

19 mm

(0.75 in.)

13 mm
(0.5 in.)

www.gfsignet.com

Panel Mount*

g

Signet Instruments
8850 8860 8900
or 9900 with 3-2850 Sensor Electronics

In-Line Installation

Field Mount - Pipe, Tank, Wall

Signet Instruments
8850 8860
with 3-8050 Universal Mount Kit

4 to 20 mA input*

2850 Sensor Electronics
with a customer supplied
Programmable Logic Controller

Integral Mount*

Signet Instrument
8850 with 3-8052 Integral Mount Kit
or 9900 with 3-8051 junction box and
3-9900.396 angle adapter

OR

Signet 2818-2823
Conductivity Electrodes

Fittings- Customer Supplied

+

+

PLC

Submersible Installation

Panel Mount

Signet Instrument
8900

System Overview

with 3-2850 Sensor Electronics

Signet Instruments
8850 8860 with 3-8050 Universal Mount Kit
9900 with 3-2850 Sensor Electronics
and customer supplied pipe extension or conduit with 3/4 in. FNPT threads***

+

Signet 2818-2823
Conductivity Electrodes

*If distance requires is greater that 100 ft, use 3-2850-52 S
** Special Order for 0.01, 0.1 and 1.0 cells. Submersible installation not applicable for Sanitary Conductivity Electrode.
***Refer to the Si

net Submersion brochure located in the K-Factors Fittings and More Kit (3-0000-709) for installation suggestions and options.

Field Mount - Pipe, Tank, Wall*

OR

**

3

L or 3-2850-52 4 to 20 mA sensor electronics

+

ENTER

Signet 2819-2823
Conductivity
Electrodes

Special Order
for 0.01, 0.1 and

1.0 cells

4 to 20 mA input*

2850 Sensor Electronics
with a customer supplied Programmable
Logic Controller

OR

All sold separately

PLC

+

All sold separately

Operating Temperature/Pressure Graphs

Note:

The pressure/temperature graphs are specifically
for the Signet sensor. During system design the
specifications of all components must be considered.
In the case of a metal piping system, a plastic sensor
will reduce the system specification.

(psi)

(bar)

15.5

225

13.8

200

12.1

175

10.3

150

8.6

125

6.9

100

5.2

75

3.4

50

1.7

25

0

-40

°F°C-40 -4 32 68 104

-20

0

Optional 316 SST Fitting

Standard PP Fitting

20 40

60

140

80

176

100 120
212

248

Sanitary Connection

140
284

www.gfsignet.com

Operating Range Chart

Bottled

UPW USP

Rinse
Water

3-2820 ( 0.1 Cell)

3-2818
3-2819

0.055µS

18.2 MΩ
PPM TDS

1µS

1MΩ

3-2821 (1.0 Cell)

10µS

100KΩ

5 50

Water

3-2823 (20.0 Cell)

3-2822

(0.01 Cell)

100µS

10KΩ

Application Tips

• Liquid levels must be high enough to cover vent hole
on sensor body.

• Threads on models 2823 can be reversed in the field.

• Use 2819 series electrodes with the 3-2850-63
electronics and 8900 for applications requiring
multiple measuring points.

• Install sensors in an area that will remain free of air
bubbles and sediment build-up.

• Conductivity measurements are affected if
electrodes are coated by process substances.

1,000µS

1KΩ
500

Cooling Tower

Waste Waters

10,000µS

100Ω

5,000

Deionization Regen. Chemicals

Alkali Cleaners, Acids/Bases

Brackish

Sea Water

(Salinity)

(10.0 Cell)

100,000µS

50,000mS 200,000mS

25,000

50,000 100,000

400,000µS

200,000

Ordering Notes

1) Alternate wetted materials and sensor lengths are
available through special order.

2) The 2818 and 2819 maximum cable length is 7.6 m
(25 ft) unless used with the 9900.

3) All other sensors - cable lengths of up to
30 m (100 ft) are available - consult factory.

4) Use PN 3-2820.390 or 3-2820.391 for a submersible
threaded connection.

Example information on NIST
Traceability Certificate

CERTIFICATE

Date: November 10, 2011
Sensor Part Number: 3-2819-T1C
Sensor Serial Number: 980159-04
Sensor Cell Constant: 0.0102
Temp. Element Offset: 0.1 °C
Measured at: 24.8 °C

NIST Certified

Please refer to Wiring, Installation, and Accessories sections for more information.

www.gfsignet.com

Ordering Information

Mfr. Part No. Code

Cell
Constant

Sensor Material and Mounting Insertion into Tee size

3-2818-1** 159 001 718 0.01 cm-1 316 SS electrode, ¾ in. in-line only
3-2819-1 198 844 010 0.01 cm-1 316 SS electrode, ¾ in. threads in-line only
3-2819-1C 159 000 651 0.01 cm-1 316 SS electrode, ¾ in. threads (certified) in-line only

3-2819-S1 159 000 085 0.01 cm-1 316 SS electrode, Sanitary Tri-clamp flange 1 to 1½ in.
3-2819-S1C
3-2819-S2
3-2819-S2C†* 159 000 088 0.01 cm-1 316 SS electrode, Sanitary Tri-clamp flange 2 in.
3-2819-T1
3-2819-T1C
3-2819-T2

†

* 159 000 087 0.01 cm-1 316 SS electrode, Sanitary Tri-clamp flange 1 to 1½ in.

†

159 000 086 0.01 cm-1 316 SS electrode, Sanitary Tri-clamp flange 2 in.

†

159 000 081 0.01 cm-1 Titanium electrode, Sanitary Tri-clamp flange 1 to 1½ in.

†

* 159 000 083 0.01 cm-1 Titanium electrode, Sanitary Tri-clamp flange 1 to 1½ in.

†

159 000 082 0.01 cm-1 Titanium electrode, Sanitary Tri-clamp flange 2 in.
3-2819-T2C†* 159 000 084 0.01 cm-1 Titanium electrode, Sanitary Tri-clamp flange 2 in.
3-2820-1 198 844 000 0.1 cm-1 316 SS electrode, ¾ in. threads in-line only
3-2820-1C 159 000 654 0.1 cm-1 316 SS electrode, ¾ in. threads (certified) in-line only
3-2820-S1 159 000 089 0.1 cm-1 316 SS electrode, Sanitary Tri-clamp flange 1 to 1½ in.
3-2820-S1C†* 159 000 091 0.1 cm-1 316 SS electrode, Sanitary Tri-clamp flange 1 to 1½ in.
3-2820-S2
3-2820-S2C†* 159 000 092 0.1 cm-1 316 SS electrode, Sanitary Tri-clamp flange 2 in.
3-2820-T1
3-2820-T2

†

159 000 090 0.1 cm-1 316 SS electrode, Sanitary Tri-clamp flange 2 in.

†

159 000 624 0.1 cm-1 Titanium electrode, Sanitary Tri-clamp flange 1 to 1½ in.

†

159 000 625 0.1 cm-1 Titanium electrode, Sanitary Tri-clamp flange 2 in.
3-2821-1 198 844 001 1.0 cm-1 316 SS electrode, ¾ in. threads in-line only
3-2821-1C 159 000 650 1.0 cm-1 316 SS electrode, ¾ in. threads (certified) in-line only
3-2821-S1
3-2821-S1C†* 159 000 095 1.0 cm-1 316 SS electrode, Sanitary Tri-clamp flange 1 to 1½ in.
3-2821-S2
3-2821-S2C†* 159 000 096 1.0 cm-1 316 SS electrode, Sanitary Tri-clamp flange 2 in.
3-2821-T1

3-2821-T2

†

159 000 093 1.0 cm-1 316 SS electrode, Sanitary Tri-clamp flange 1 to 1½ in.

†

159 000 094 1.0 cm-1 316 SS electrode, Sanitary Tri-clamp flange 2 in.

†

159 000 626 1.0 cm-1 Titanium electrode, Sanitary Tri-clamp flange 1 to 1½ in.

†

159 000 627 1.0 cm-1 Titanium electrode, Sanitary Tri-clamp flange 2 in.
3-2822-1 198 844 002 10 cm-1 316 SS electrode with ¾ in. threads in-line or submersible

mounting only

3-2823-1 198 844 003 20 cm-1 316 SS electrode, ¾ in. reversible threads in-line or submersible

mounting only

†

Available for 0.01 cm-1, 0.1 cm-1, and 1.0 cm-1 cells only
*NIST Certified
**NIST certificate available. Contact the factory.

Special Order Options - Please consult the factory

High Temperature and Pressure options.
Wetted materials (Hastelloy-C, Monel and Titanium) and sensor lengths.
Cable length extensions of up to 30 m (100 ft). For resistivity measurements above 10 MΩ, the maximum cable length is

7.6 m (25 ft)
Wet-Tap, ball valve retractable sensor for long insertion length available as a special order.

Accessories and Replacement Parts

Mfr. Part No. Code Description

3-2820.390 198 840 223 ¾ in. NPT fitting, 316 SS for use with 2822-1 and 2823-1 for submersible mounting
3-2820.391 198 840 221 ¾ in. NPT fitting, Polypro replacement for 2819-1, 2820-1 or 2821-1
3-2820.392 198 840 222 ½ in. NPT fitting, 316 SS for use with 2819-1, 2820-1 or 2821
3-2850-61 159 001 400 Universal junction box, conductivity electronics, digital (S
3-2850-62 159 001 401 Universal junction box, conductivity electronics, 4 to 20 output
5523-0322 159 000 761 Sensor cable (per ft), 3 cond. plus shield, 22 AWG (for cable extension through a junction

box for the following sensors: 3-2820, 3-2821, 3-2822, 3-2823

3-8050-1 159 000 753 Universal mount junction box

3-2819.099 Rev J (5/13)

© Georg Fischer Signet LLC
3401 Aero Jet Avenue, El Monte, CA 91731-2882 U.S.A. • Tel. [phone] • Fax [phone] • www.gfsignet.com • e-mail: [e-mail]
Specifications subject to change without notice. All rights reserved. All corporate names and trademarks stated herein are the property of their respective companies.

3

L) output