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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.
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 |