GF Signet 2850 conductivity/resistivity sensor electronics and integral systems, 0.055–400,000 µS, 4–20 mA or digital S3L
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Quick overview
- Type: Conductivity sensor
- Signal / Protocol: 4–20 mA
- Hazardous area: General purpose
- Genuine productsSourced from the manufacturer or authorised channels
- Delivery across BangladeshDhaka, Chattogram and all industrial zones
- After-sales supportInstallation guidance and warranty handling
- Reply within 24 hoursCall +880 1713 552466 or email hello@argonmark.com
Specifications
| General | |
|---|---|
| Part no. | BD-1614 |
| Category | Liquid Analysis (pH, ORP & Conductivity) |
| Group | Instrumentation & Control |
| Brand | GF Signet |
| Model | 2850 |
| Technical | |
| Type | Conductivity sensor |
| Signal / Protocol | 4–20 mA |
| Hazardous area | General purpose |
Datasheet
Technical features
| Universal mount (pipe, wall, tank), ¾ in FNPT junction-box mount, or integral in-line system with electrode | |
| Works with all GF conductivity electrodes; custom cell constant programmed at the factory for integral systems | |
| EasyCal automatically recognises standard conductivity test solutions | |
| Digital S3L output extends distance to GF 9900/9950 transmitters to 120 m | |
| Pure-water compensation for readings below 0.5 µS with the 0.01 cell | |
| Test certificate supplied with 2839–2842 sensors; USP certification tool available |
Applications
| Water treatment and water quality monitoring | |
| Reverse osmosis, deionisation, demineraliser regeneration and rinse | |
| Scrubber, cooling tower and boiler protection |
Factory 4–20 mA spans (integral systems)
| 0.01 cell | 0–100 µS/cm |
|---|---|
| 0.1 cell | 0–1000 µS/cm |
| 1.0 cell | 0–10,000 µS/cm |
| 10.0 cell | 0–200,000 µS/cm |
| 20.0 cell (special order) | 0–400,000 µS/cm |
Key specifications
| Measuring range | 0.055 to 400,000 µS (18.2 MΩ to 10 kΩ resistivity) |
|---|---|
| Output | 2-wire 4–20 mA (8 selectable ranges per cell) or digital S3L |
| Accuracy | ±2% of reading (conductivity); < 0.2 °C (temperature) |
| Power | 12–24 V DC loop powered (4–20 mA) or 5–6.5 V DC (S3L) |
| Enclosure | NEMA 4X / IP65 |
| Cell constants (integral) | 0.01, 0.1, 1.0, 10.0 or 20.0 /cm |
Performance
| Conductivity range | 0.055 to 400,000 µS |
|---|---|
| Resistivity range | 18.2 MΩ to 10 kΩ |
| Accuracy | ±2% of reading conductivity; < 0.2 °C temperature |
| Resolution | 0.1% of reading; < 0.2 °C |
| Update rate | < 600 ms |
| EasyCal solutions recognised | 146.93, 1408.8, 12,856 µS (ASTM D1125) and 10 µS to 100,000 µS standard solutions |
Electrical
| Power, 4–20 mA version | 12–24 V DC ±10%, regulated, loop powered |
|---|---|
| Power, digital version | 5–6.5 V DC ±5%, 3.0 mA max; reverse polarity and short-circuit protected |
| Digital output | S3L serial ASCII, TTL, 9600 bps |
| Current output accuracy | ±2% of span; resolution 7 µA; error 22 mA |
| Max. loop resistance | 50 Ω at 12 V, 325 Ω at 18 V, 600 Ω at 24 V DC |
Environment & housing
| Operating temperature | −10 to 85 °C |
|---|---|
| Storage temperature | −20 to 85 °C |
| Relative humidity | 0–95%, non-condensing |
| Enclosure | NEMA 4X / IP65; PBT (NPT j-box), PBT/PVC-C (universal mount) |
| Shipping weight | 0.24–0.75 kg depending on version |
| Approvals | CE, UKCA, FCC; RoHS, China RoHS |
Notes
| Data from the manufacturer's published datasheet. Confirm model, range, materials and approvals with Argonmark before ordering. |
Description
The GF Signet 2850 is the sensor electronics for GF conductivity and resistivity electrodes, available as a universal pipe/wall/tank mount, a ¾ in FNPT junction box for submersible sensors, or a complete in-line system with an electrode of 0.01, 0.1, 1.0, 10.0 or 20.0 /cm cell constant. It covers 0.055 to 400,000 µS, from ultrapure water at 18.2 MΩ to strong solutions.
It outputs either a loop-powered 4–20 mA signal with eight field-selectable ranges per cell constant, or a digital S3L signal to GF 9900/9950 transmitters up to 120 m away. Accuracy is ±2% of reading, EasyCal recognises standard test solutions automatically, and the housing is NEMA 4X/IP65.
Argonmark Ltd supplies GF Signet instruments across Bangladesh — to pulp and paper mills, water and effluent treatment plants, chemical, textile, food and power plants in Dhaka, Chattogram, Gazipur, Narayanganj and beyond. Send us the model, measuring range, process connection, wetted materials and output you need, and we will confirm the right configuration, lead time and price.
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