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GF Signet
GF Signet 2850 Conductivity/Resistivity Sensor
Quote on request
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0.055–400,000 µS/cm; S3L or 4–20 mA; NEMA 4X. RFQ + selection help.
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Key parameters
Accuracy
Conductivity ±2% of reading; temperature ±0.2 °C
Type
Type 2850 conductivity/resistivity sensor electronics (universal, j-box, integral)
Range Conductivity
0.055…400,000 µS/cm
Range Resistivity
18.2 MΩ…10 kΩ
Outputs
Digital S3L or two-wire 4–20 mA (field-selectable ranges per cell constant)
Cell Constants
Integral systems with 0.01 / 0.1 / 1.0 / 10.0 / 20.0 cm⁻¹ electrodes
Fits conductivity and resistivity loops where you need a GF Signet Type 2850 with 0.055–400,000 µS/cm / 18.2 MΩ–10 kΩ coverage, S3L or 4–20 mA outputs, and cell constants from 0.01 to 20.0 cm⁻¹.
Key advantages
- Ranges — Conductivity 0.055…400,000 µS/cm; resistivity 18.2 MΩ…10 kΩ
- Accuracy — Conductivity ±2% of reading; temperature ±0.2 °C
- Outputs — Digital S3L or two-wire 4–20 mA (field-selectable)
- Cells — Integral 0.01 / 0.1 / 1.0 / 10.0 / 20.0 cm⁻¹ electrodes
- Enclosure — NEMA 4X / IP65 PBT; EasyCal; pairs with 9900/9950
Typical applications
- RO, DI, and demineralizer loops.
- Scrubbers, cooling towers, aquatic life support.
- Dual-channel 2850-63 with GF 9950.
Selection guide
- Cell constant — Match process conductivity/resistivity
- Output — S3L vs 4–20 mA
- Form — Universal / j-box / integral
- Transmitter — 9900 / 9950 pairing
Common mistakes
- Wrong cell constant for ultrapure vs high-conductivity water.
- Expecting dual channel on a single-channel code.
- Ignoring −10…+85 °C electronics limit.
When to RFQ / what to tell us
- Conductivity/resistivity range; cell constant.
- Output form; transmitter; quantity; ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 20204 |
| Brand | Georg Fischer / GF Signet |
| Model | Signet 2850 Conductivity / Resistivity Sensor |
| Product type | Conductivity / Resistivity Sensor |
| Type | Type 2850 conductivity/resistivity sensor electronics (universal, j-box, integral) |
| Conductivity range | 0.055…400,000 µS/cm |
| Resistivity range | 18.2 MΩ…10 kΩ |
| Accuracy | Conductivity ±2% of reading; temperature ±0.2 °C |
| Outputs | Digital S3L or two-wire 4–20 mA (field-selectable ranges per cell constant) |
| Cell constants | Integral systems with 0.01 / 0.1 / 1.0 / 10.0 / 20.0 cm⁻¹ electrodes |
| Enclosure | NEMA 4X / IP65 PBT electronics enclosure |
| Temp compensation | PT-1000 RTD; EasyCal automatic test-solution recognition |
| Transmitters | Pairs with GF 9900 / 9950; dual-channel 2850-63 for 9950 I/O optimization |
| Operating temperature | −10…+85 °C (electronics) |
| Application | RO, DI, demineralizer, scrubber, cooling tower, aquatic life support |
Documents
FAQ
Q: Conductivity range? A: 0.055…400,000 µS/cm.
Q: Outputs? A: Digital S3L or two-wire 4–20 mA.
Q: What should I send for a quote? A: Range/cell/output, quantity, ship-to.
Links
| Parameter | Value |
|---|---|
| Accuracy | Conductivity ±2% of reading; temperature ±0.2 °C |
| Type | Type 2850 conductivity/resistivity sensor electronics (universal, j-box, integral) |
| Range Conductivity | 0.055…400,000 µS/cm |
| Range Resistivity | 18.2 MΩ…10 kΩ |
| Outputs | Digital S3L or two-wire 4–20 mA (field-selectable ranges per cell constant) |
| Cell Constants | Integral systems with 0.01 / 0.1 / 1.0 / 10.0 / 20.0 cm⁻¹ electrodes |
| Enclosure | NEMA 4X / IP65 PBT electronics enclosure |
| Temp Comp | PT-1000 RTD; EasyCal automatic test-solution recognition |
| Transmitters | Pairs with GF 9900 / 9950; dual-channel 2850-63 for 9950 I/O optimization |
| Operating Temperature | −10…+85 °C (electronics) |
| Application | RO, DI, demineralizer, scrubber, cooling tower, aquatic life support |
| Document | GFPS Type 2850 datasheet + 3-2850.090 operating instructions |