Signet 3-2850-51 Conductivity-Resistivity Electrode & Sensors

Signet 3-2850-XX-XXX Paddlewheel Conductivity-Resistivity Electrode & Sensors

3-2850-XX-XXX Conductivity-Resistivity Sensor Electronics

Item#: 159001398 | Model#: 3-2850-51 | Series#: 3-2850-XX-XXX

Price: $42200

Availability: Ships within 2 to 3 weeks
$42200 /ea

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2850 Conductivity-Resistivity Sensor Electronics and Integral System

The Signet 2850 Conductivity/Resistivity Sensor Electronics are available in various configurations for maximum installation flexibility. The universal mount version is for pipe, wall, or tank mounting and enables single or dual (digital versions only) inputs using any standard Signet conductivity/resistivity sensor. The threaded j-box version can be used with these same Signet sensors for submersible sensor mounting. It is also available as a combined integral system configuration for in-line mounting and includes a conductivity electrode in a choice of 0.01, 0.1, 1.0, 10.0 or 20.0 cm-1 cell constants. The 2850 is ideal for applications with a conductivity range of 0.055 to 400,000 μS or a resistivity range of 18.2 MΩ to 10 kΩ. All 2850 units are available with a choice of a single or dual digital (S3L) outputs, or a single 4 to 20 mA. The single digital (S3L) output version can be paired with the 9900 Transmitter to extend the distance between the measuring points to 120 m (400 ft). The 8900 Multi-Parameter Controller allows for up to six sensor inputs directly into the Signet 8900 Multi-Parameter Controller. All 2850 units are built with NEMA 4X/IP65 enclosures which allow output wiring connections with long cable runs of up to 305 m (1,000 feet). The two-wire 4 to 20 mA output version is available with eight 4 to 20 mA output ranges for each electrode cell constant. Each range can be inverted and is field-selectable. EasyCal is a standard feature that automatically recognizes conductivity test solution values for simple field calibration. A certification tool is available for validation of the sensor electronics according to USP requirements.

Fields of Application:
  • Water Treatment and Water Quality Monitoring
  • Reverse Osmosis
  • Deionization
  • Demineralization, Regeneration and Rinse
  • Scrubber
  • Cooling Tower and Boiler Protection
  • Aquatic Animal Life Support Systems
  • CE
  • FCC
  • RoHS Compliant
  • China RoHS
  • Certificate of calibration supplied with all sensors
  • Custom cell constant programmed into the electronics
  • Integral mount systems for quick and easy installation
  • Compact design for maximum installation flexibility
  • Dual channel unit available for low cost installation with Signet 8900 Multi-Parameter Controller
  • For use with ALL Signet conductivity electrodes
  • Digital (S3L) interface or two-wire 4 to 20 mA output
  • EasyCal with automatic test solution
Series Data
Compatible ElectrodesAll Signet Sensors
NPT Mount Junction Box for Integral MountPBT
Universal/Remote MountPBT, CPVC
EasyCal - Automatic Recognition of the Following Conductivity Values146.93 μS, 1408.8 μS, 12856 μS (@25 °C) (Test solutions Per ASTM D1125-95) 10 μS, 100 μS, 200 μS, 500 μS, 1000μS, 5000 μS, 10,000 μS, 50,000 μS, 100,000 μS (@ 25 °C) (Standard test solutions)
Power12 to 24 VDC ±10%, regulated for 4 to 20 mA output (typically called “Loop Powered”) 5 to 6.5 VDC ±5% regulated recommended (provided by the Signet 8900), 3.0 mA max for Digital (S3L) output (Reverse polarity and short circuit protected)
Digital (S3L) Output:Serial ASCII, TTL level 9600 bps
Accuracy Conductivity±2% of reading
Accuracy Temperature< 0.2 °C
Resolution Conductivity0.1% of reading
Resolution Temperature< 0.2 °C
Update Rate Single channel models< 600 ms
Update Rate Dual channel models< 1200 ms
Available Data via Digital (S3L) OutputRaw conductivity, Calibrated conductivity, Calibrated temperature-compensated conductivity, Temperature
Operating Temperature(-10 °C to 85 ° C ) / (14 °F to 185 °F)
Storage Temperature(-20 °C to 85 ° C ) / (-4 °F to 185 °F)
Relative Humidity0 to 95%, non-condensing
EnclosureNEMA 4X/IP65
Factory Set Span (Integral mount only) 0.01 cell (2818*, 2819*, 2839**)4 to 20 mA = 0 to 100 μS
Factory Set Span (Integral mount only) 0.10 cell (2820*, 2840**)4 to 20 mA = 0 to 1000 μS
Factory Set Span (Integral mount only) 1.0 cell (2821*, 2841**)4 to 20 mA = 0 to 10,000 μS
Factory Set Span (Integral mount only) 10.0 cell (2822*, 2842**)4 to 20 mA = 0 to 200,000 μS
Factory Set Span (Integral mount only) 20.0 cell (2823)*4 to 20 mA = 0 to 400,000 μS
Max. Loop Resistance50 Ω @ 12 VDC, 325 Ω @ 18 VDC ,600 Ω @ 24 VDC
Accuracy±2% of output span
Resolution7 μA
Update Rate< 600 ms
Error Indication22 mA
Pure Water CompensationWhen using 0.01-cm cell and raw conductivity value < 0.5 μS, the 2850 auto-switches to compensate for non-linear temperature effects found in this low conductivity (high resistivity) range.
Product Dimensions
Weight1.65 lb
Width180.00 mm, 7.09 in
Height120.00 mm, 4.72 in
Length280.00 mm, 11.02 in
Document TitleDownload
CertificatesClick Here to Download
DatasheetsClick Here to Download
Instruction ManualsClick Here to Download
FAQsClick Here to Download
IDShort DetailsPrice 
3-2850.101-1Plug-in NIST recertification tool, 1.0uS$121.00
3-2850.101-2Plug-in NIST recertification tool, 2.5uS$121.00$101.03
3-2850.101-3Plug-in NIST recertification tool, 10.0uS$121.00
3-2850.101-4Plug-in NIST recertification tool, 10.0M ohms$121.00
3-2850.101-5Plug-in NIST recertification tool, 18.2M ohms$121.00
5523-03225523-0322 for Electrode & Sensors by Georg Fischer$3.00




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