C8825.4 TOROIDAL CONDUCTIVITY SENSOR
- Manufacturer: B&C Electronics
- Category: Water quality, SENSORS, Conductivity Sensors
These B&C Electronics C8825.4 Toroidal Conductivity Probes measure electrical conductivity and TDS using the inductive method.
Thanks to the analog and digital outputs, the probes can be connected to the most common PLCs or data acquisition cards.
B&C Electronics offers the MC6587 and MC7687 multi-channel controllers that allow complete management of up to three probes, displaying measurements and messages that guide calibration and configuration.
Ranges
Conductivity ranges are configurable from 4 mS to 2000 mS. TDS scales are configurable from 10.00 ppt to 1000 ppt.
It is also possible to associate a scalability factor from the 10% to the 100% to obtain intermediate full scale values in the 4/20 mA current loop through digital commands.
Mode of operation
The probes can be configured to operate in analog or digital mode. If connected to a master device, various operations can be performed through specific digital commands.
Analog output
The 4/20 mA current loop is proportional to the main measurement value. The current loop is galvanically isolated, for interfacing with PLC or data acquisition cards.
Serial interface
The isolated RS485 serial interface allows calibration and configuration of the probes, simultaneous transmission of conductivity, TDS and temperature measurements. The bootloader function allows the user to upgrade the probes' firmware.
Communication protocols
The B&C ASCII protocol coexists with the MODBUS RTU protocol (function 03, 06, 16) for the transmission of measurements, configuration and calibration of probes.
Filtering software
The filter software works with the sensor input signal and two selectable time constants. In order to obtain good reading stability and fast response to process changes, the user can set the response time for both small and large variation signals.
Temperature compensation
The probes include a temperature sensor for automatic compensation. The reference temperature and the temperature coefficient value can be selected digitally.
Easy installation
The C8825.4 probe is designed for process connection using a 1”1/2 MNPT thread. For submersible installations, B&C Electronics offers extension tubes in various materials and lengths and the SZ7531 adapter.
Power supply
The probes are powered with a voltage of 9/36 VDC in the current loop, fed by a PLC or data acquisition cards or by a power supply placed in series between the analog output and the acquisition device. Even in digital mode, power is supplied by the current loop.
Properties
| Technical Characteristics C8825.4 | |
| Conductivity scales: | 0/4.000 – 0/40.00 – 0/400.0 mS and 0/20.00 – 0/200.0 – 0/2,000 mS |
| TDS Scales: | 0/2,000 – 0/20.00 – 0/200.0 ppt and 0/10.00 – 0/100.0 – 0/1,000 ppt |
| TDS/EC Factor: | 0.450/1,000 1/S |
| Scalability factor 4/20 mA: | 10/100% |
| Sensitivity: | 60/160 % |
| Zero: | ±10 % of full scale |
| Resolution: | 1 digit |
| Temperature limit: | – 5/+50 °C |
| Reference temperature: | 20/25 °C |
| Temperature coefficient: | 0.00/3.50 %/°C |
| Dual software filter: | 2/220 seconds |
| Power supply: | 9/36 VDC |
| Current loop: | 4/20 mA isolated |
| Burden: | 600 ohm max at 24 VDC |
| Digital output: | RS 485 isolated |
| Protocols: | B&C ASCII and Modbus RTU (03, 06, 16 functions) |
| Transmission speed: | 2400 / 4800 / 9600 / 19200 baud |
| Probe ID: | 01/99 (B&C protocol) 01/243 (Modbus protocol) |
| Probe network: | 32 max. |
| Operating temperature: | 60 °C max. |
| Operating relative humidity: | 95 % non-condensing |
| Working pressure: | 10 bar at 25°C / bar at 50°C |
| Body material: | PVC-C |
| Dimensions: | L=165mm, D=60mm |
| Weight: | Body 520g, cable 640g |
| Wire: | Cable from 10 m to 100 m, PVC sheath |
| Process connection: | 1.5” MNPT thread |
| Protection: | IP 68 |
| EMC/RFI Compliance: | EN 61326-2-3/2013 – EN55011/2009 |
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