Conductivity/Resistivity/TDS Controller C7687
Controller for conductivity, resistivity and TDS with high accuracy and 4-20 mA output, ideal for continuous monitoring in water and industrial applications.
Description
Conductivity/Resistivity/TDS Controller
The Conductivity, Resistivity and TDS controller is a reliable and versatile solution for continuous monitoring of water quality in industrial and environmental applications.
The device is compatible with 2-electrode and 4-electrode conductivity sensors, as well as temperature sensors Pt100 / Pt1000, ensuring high accuracy and long-term stability.
It supports:
- Conductivity measurement
- TDS (Total Dissolved Solids) calculation
- Resistivity measurement
TDS values are derived from conductivity through a configurable conversion factor depending on the solution composition.
With multiple measurement ranges and automatic or manual temperature compensation, the controller is suitable for demanding applications.
It also supports Pt100 or Pt1000 temperature sensors for automatic temperature compensation and real-time temperature indication.
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The instrument provides the following functions:
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Applications
- Drinking Water
- Industrial processes
- Swimming pools
- Water treatment
Technical Data
Conductivity/Resistivity/TDS Controller C7687 |
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| Inputs |
2 electrodes cells |
| Zero | ±10 %, ±5.0 °C, ±9 °F |
| Sensitivity | 60 ÷ 160 % |
| Resolution | 1/2000, 0.1 °C/°F |
| Accuracy | 0.2 % |
| Repeatability | 0.1 % |
| Non-linearity | 0.1 % |
| Dual filter software | 0.4 ÷ 50.0 seconds for small and large variations |
| Dual analog output | 0-20 mA / 4-20 mA, Rmax 600 Ω |
| Dual set points HI/LO | ON/OFF – PID – PFM – PWM, SPST relays |
| Hysteresis | 0 ÷ 1 % |
| Delay | 0 ÷ 999.9 seconds |
| Alarm | SPDT relay with delay 0 ÷ 100.0 seconds |
| Cleaning function | off / autoclean / manual, relay SPDT repetition time: 0.1 ÷ 100.0 hours cleaning time: 1.0 ÷ 60.0 seconds holding time: 0.0 ÷ 20.0 minutes |
| SPST & SPDT relay contacts | 220V – 5 A resistive load Operating temperature: -10 ÷ 60 °C |
| Humidity | 95% without condensation |
| Power supply | 85 ÷ 264Vac – 50/60 Hz 9 ÷ 36Vdc, 12 ÷ 24Vac (option 091.42x) |
| Terminal blocks | removable |
| Weight | 450 g |
| Enclosure | ABS, IP65 protection |
| Dimensions | 98x98x104 mm, panel cut-out 90x90x95 mm (C 7687) |
| EMC/RFI conformity | EN 61326 |
| Registered design | 002564666-003 |
Technical specifications may change without notice.
Package Contents
- Instruction manual
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