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Thermo Scientific Alpha TDS 200
Total Dissolved Solids Controller/Transmitter




[ DISCONTINUED ]

Product Features

Measure from pure water to electroplating rinse tank water with Thermo Scientific’s Alpha TDS 200. Reliable with straightforward process control, these control/transmitters measures with up to ±1 % full scale accuracy across eight conductivity/TDS ranges.

For heightened security, use the Alpha TDS 200 with two levels of password security to protect calibration and meter settings from unauthorised tampering.

:: Measures up to eight ranges at ±1 % full range accuracy
   
:: Easy push-button calibration. Controller freezes data transmission and relay activities during calibration and maintenance
   
:: Selectable temperature coefficient for higher
TDS accuracy
   
:: Two SPDT relays allows high/low set-points limit control. Each relay comes with their independent hysteresis to prevent relay-chattering
   
:: Choice of automatic or manual temperature compensation. Three-wire system compensates error due to cable resistance
   
:: Full-scale 4 to 20 mA galvanically isolated current
output for process control
   
:: 85 to 250 VAC. 50/60 Hz or DC variable input allows controller to be used with a wide range of supply voltages

Applications

TDS 200: Ideal for drinking water, monitoring and control, hydroponics and aquaponic solution balance and control, pools and spa hardness and salinity control.

Specifications

Product Specification

Description
Conductivity
Range ... to 10.00 ppm ; ... to 100.0 ppm ;
... to 1000 ppm ; ... to 5.00 ppt ;
... to 10.00 ppt ; ... to 100.0 ppt
Resolution 0.01 ppm ; 0.1 ppm ;
1 ppm ; 0.01 ppt ;
0.1 ppt
Cell Constant 0.1 ; 1 ; 10
Relative Accuracy ±1 % of full scale
Temperature
Range -10 to 110 ºC
Resolution 0.1 ºC
Accuracy ±0.5 ºC
Sensor Pt100; 2 or 3 wire
Compensation Auto/manual (0 to 50 ºC)
Coefficient 0.0 to 5.0 %
Normalisation 10.0 ºC to 30.0 ºC
TDS
Factor 0.40 to 1.0
Set Point And Controller Functions
Set Point 1 (SP1)/
set Point 2 (SP2)
... to 10.00 ppm or ... to 100.0 ppm or
... to 1000 ppm or ... to 5.00 ppt or
... to 10.00 ppt or ... to 100.0 ppt
Switching Conductivity Hysteresis 0 to 10 % of full scale
Switching TDS Hysteresis 0 to 10 % of full scale
Function Limit control
Contact Outputs 2 SPDT relays
Switching Voltage/
Current/Power
Max. 250 VAC / max. 3 A / max. 600 VA
Electrical Data and Connections
Transmitter Function 4 to 20 mA scalable outputs for Conductivity, galvanically isolated
Load 200 Ohm
Conductivity/TDS Input 2-pin terminal
Connection Terminal 3-pin, 7-pin & 9-pin terminal, detachable blocks, 1 fixed connector
Display
LED 7 segments display
Power Supply
Input 85 to 250 VAC, 50/60 Hz
Main Fuse 250 mA, anti-surge, S504 Bussman
Rated Input Current (Max.) 100 mA
Insulation Category II
EMC Specifications
Emitted Interference According to EN 61326
Immunity To Interference According to EN 61326
Environmental Conditions
Operating Temperature Range -10 to 50 ºC
Max. Relative Humidity 10 to 95 % (non-condensing)
Mechanical Specifications
Dimensions (WxHxD) 96 x 48 x 150 mm
Weight 300 g (unit) / 350 g (packed)
Ingress Protection IP50

Order Information

Order No.

Item
TSTDSCTP0200 Alpha TDS 200 panel-mount TDS controller/transmitter. Incl. terminal blocks, threaded rods, catch, etc

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