3
Signet 2818-2823 Series Conductivity Sensor Instruction Manual
Specifi cations and Wiring
3-9900.092 Direct Conductivity/Resistivity Module
2850 Conductivity/Resistivity Sensor Electronics
*Required
installation
postition for
0.01 cell
Use caution to avoid air bubbles or sediment
trapping inside the electrode cavity.
In-line Submersible
OR
Recommended Position
SW1
D3
1
2
3
1
2
3
4
ON
CTS
V+
Gnd
Data
Temp. IN
(WHITE)
Sensr Gnd
(SHIELD)
Signal IN
(RED)
Signal RTN
(BLK)
Wiring
Loop Voltage
H COMM Module
DC Power
Cond/Res Module
SHIELD
TEMP (WHT)
ISO GND (BLK)
SIGNAL (RED)
2818 - 2823
SHIELD (SILVER)
TEMP (WHT)
ISO GND (BLK)
SIGNAL (RED)
Black
Red
White
Shield
Specifi cations
General
Cell Constant
2818 ................................... 0.01 cm
-1
2819 ................................... 0.01 cm
-1
2820 ................................... 0.1 cm
-1
2821 ................................... 1.0 cm
-1
2822 ................................... 10.0 cm
-1
2823 ................................... 20.0 cm
-1
Operating Range:
2818 ................................... 0.055 to 100 μS (10 kΩ to 18.2 MΩ)
2819 ................................... 0.055 to 100 μS (10 kΩ to 18.2 MΩ)
2820 ................................... 1 to 1000 μS (1 kΩ to 1 MΩ)
2821 ................................... 10 to 10,000 μS (5 to 5000 ppm)
2822 ...................................
100 to 200,000 μS (50 to 100,000 ppm)
2823 ...................................
200 to 400,000 μS (100 to 200,000 ppm)
Cell Constant Accuracy .......... ±2% (certified cells ±1%)
Temp. Compensation Device.. PT1000
Cable Length
Standard ............................. 4.6 m (15 ft)
Maximum ............................ 30 m (100 ft)
2818 & 2819-1 .................... 7.6 m (25 ft) max. when used
with 8850 & 8860. Do Not splice cable.
Sanitary fitting size ................. 1 in., 1½ in., 2 in.
Wetted Materials
O-Rings .................................. EPR (EPDM)
Electrodes...............................
316L Stainless Steel (1.4408, DIN 17440)
or Titanium
Sanitary fitting .........................
316L Stainless Steel or Titanium
2822 Body .............................. CPVC
Insulator Material
2818/2819/2820/2821
.......... Carbon fiber reinforced PTFE
2823
.................................... PEEK
®
Process Connection ............... ¾ in. NPT threads;
Standard 316 SS fitting &
Optional 316 SS submersion
adapter fitting (3-2820.390)
Shipping Weight
2818/2819/2820/2821/2822
... 0.4 kg (0.8 lb)
2823
.................................... 0.3 kg (0.6 lb)
Environmental Requirements
Temperature Accuracy ........ 0.3 °C
Max. Pressure/Temperature Ratings
2818/2819/2820/2821 Fittings:
Standard Polypropylene ..... 6.9 bar @ 100 °C (100 psi @ 212 °F)
(3-2820.392) ½ NPT 316 SS
... 13.8 bar @ 120 °C (200 psi @ 248 °F)
Sanitary Connection ........... 6.9 bar @ 120 °C (100 psi @ 248 °F)
2822........................................ 6.9 bar @ 95 °C (100 psi @ 203 °F)
2823........................................ 6.9 bar @ 150 °C (100 psi @ 302 °F)
Standards and Approvals
• RoHS Compliant
China RoHS (Go to www.gfsignet.com for details)
Alternate wetted materials and overall lengths are
available through special order.
Cable length extensions
to 100 ft. (30 m) are available
through special order.
For resistivity measurements above 10 MΩ and/or
below 20°C, maximum cable length is 25 ft. (7.6 m).
(4 pages)
(4 pages)
(4 pages)
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(8 pages)
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