alpha,COND 190,1/8 DIN,Conductivity Controller,Eutech,Instruments

alpha-TDS190 1/8 DIN Total Dissolved Solids Controller with Temperature Display and Transmitter

alpha,COND 190,1/8 DIN,Conductivity Controller,Eutech,Instruments

Industrial Process Controllers & Monitors

alpha,COND 190,1/8 DIN,Conductivity Controller,Eutech,Instrumentsalpha-TDS190 1/8 DIN Total Dissolved Solids Controller with Temperature Display and Transmitter

alpha TDS190 with improved user interface enables user to gain direct access to calibration mode with CAL key and allows quick set point adjustment with SP1 and SP2 keys.

  • Quick Set Point Adjustment - SP1 and SP2 keys allow user to adjust set points easily

  • Direct Access to CAL Mode - enables user to enter calibration mode with a simple key press

  • User-Customisation with scrolling, 14-Segment LED - intuitive user interface guides user easily through setup functions

  • Multi Measurement Range- User Selectable

  • Galvanically Isolated 4-20 mA Output for remote monitoring or hardcopy recording

  • Universal Power Supply Input from 85 to 250 VAC/DC allows use at multiple sites and withstands voltage fluctuations

  • Automatic Temperature Compensation with 3-wire Pt 100 system ensures accurate readings under fluctuating temperatures

  • Adjustable Temperature Coefficient (0 to 5.0%/oC) and selectable cell constants for more accurate measurements

  • Adjustable Hysteresis (Dead Band) prevents rapid contact switching near set point

  • Non-Volatile Memory retains all stored parameters and calibration data even if power fails

  • Easy Installation and Wiring with detachable plug-in connectors


TDS 190: Ideal for drinking water, monitoring and control, hydroponics and aquaponic solution balance and control, pools and spa hardness and salinity control.


Product Specification

Conductivity Range 0.00 10.00 ppm
0.0 100.0 ppm
0.0 100.0 ppm
0 1000 ppm
0.00 5.00 ppt
0.00 10.00 ppt
0.0 to 100.0 ppt
0.0 200.0 ppt
0.01 ppm
0.1 ppm
0.1 ppm
1 ppm
0.01 ppt
0.01 ppt
0.1 ppt
0.1 ppt
Accuracy 1% of full scale
Temperature Range -10 to 110 C
Resolution & Relative Accuracy 0.1 C & 0.5 C
Temperature Sensor Pt 100 (3-wire)
Temperature Compensation Auto / Manual (0C to 100C)
Temperature Coefficient 0.0 to 5.0 %
Normalisation Temperature 10.0 to 30.0 C
Set Point and Controller Functions
Function Limit Control
Switching Hysteresis 0 to 10% of full scale
Contact Outputs, Controller 2 SPDT relays
Switching Voltage/ Current/ Power Max 250 VAC/ Max 3A/ Max 600 VA
Electrical Data and Connections
Power Requirement 85 to 260 VAC, 50/60 Hz or DC
Signal Output/ Load 4-20mA galvanically isolated / 200Ω
Connection Terminals 3 detachable connectors (3-pin; 7-pin & 9-pin terminal blocks) + 1 fixed connector
Main Fuse 250mA, Anti-surge (BUSSMAN S504 + 250mA)
Environmental Conditions
Maximum Relative Humidity 10 to 95% (Non-condensing)
Ambient Temp. Operating Range -10 to 50 C
Mechanical Specifications
Dimensions 96 x 48 x 150 mm
Weights 300 g (boxed)