Alpha RES 1000 Resistivity Controller/Transmitter

  • High Accuracy Superb accuracy delivered across 2 resistivity ranges
  • Warranty This product is covered by 1 year warranty
  • Versatile Can be used in a variety of applications
Product Options


If you are looking for a resistivity controller/transmitter which offers high accuracy of ±1% across 2 ranges the Eutech Alpha RES 1000 resistivity controller/transmitter is the perfect choice. This controller/transmitter offers adjustable temperature co-efficient from 0.0 to 10.0% this ensures higher accuracy, a pure water compensation option is inbuit for added accuracy in specific applications making this device suitable for a wide range of applications. Selecting the pure water compensation option corrects non-linearity of pure water temperature correction curves in ultrapure water applications.

The Alpha RES 1000 meter clearly displays electrode information after each successful caibration and previous data is saved for the convienience of the user. This meter is handily equiped with alarm delay and individual set-point hystereses to prevent chattering, false alarms and the need for down time.

Galvanically isolated and scaleable 0/4 to 20 mA output for high quality output on peripheral devices is the perfect feature to make this controller/transmitter the perfect choice for resistivity measurements.

Manufactured by: Eutech Instruments
Model: Alpha RES 1000 Resistivity Controller/Transmitter

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Use for virtually any batch or online applications where rapid, accurate control are required. Great for OEM/system integrator
Water Purification/Treatment
Suitable for pure, ultrapure and reagent grade water batches of incoming process water.
Hook to recorder to document data for regulatory compliance


Range 0.000 to 1.999 MOhm ; 0.00 to 19.99 MOhm
Resolution 0.001 MOhm ; 0.01 MOhm
Accuracy ±1 % full scale reading
Cell Constant 0.1 ; 0.01
Range -9.9 to 125 °C
Resolution 0.1 °C
Accuracy ±0.5 °C
Sensor Pt100 / Pt1000 (jumper selectable)
Compensation Auto/manual (normalized at 25 °C)
Coefficient Ultrapure water or linear 0.00 to 10.00 %
Set Point and Controller Functions
Set Point 1 (SP1) / Set Point 2 (SP2) 0.000 to 1.999 MOhm or 0.00 to 19.99 MOhm
Switching Resistivity Hysteresis 0 to 10 % of full scale
Function (Switchable) P control (pulse length/pulse frequency); limit control
Adjustable Period With Pulse Length Controller 0.5 to 20 sec
Adjustable Period With Pulse Frequency Controller 60 to 120 pulse/min
Pickup/Dropout Delay 0 to 2000 sec
Contact Outputs 3 SPDT relays
Switching Voltage/ Current/Power Max. 250 VAC / max. 3 A / max. 600 VA
Alarm Functions
Function (Switchable) Steady or fleet (pulse)
Wash Cycle 0.1 to 199.9 hr
Wash Duration 1 to 1999 sec
Pickup Delay 0 to 2000 sec
Switching Voltage/ Current/Power Max. 250 VAC / max. 3 A / max. 600 VA
Electrical Data And Connections
Transmitter Function 0/4 to 20 mA scalable outputs for Resistivity,�?????????????�????????????�???????????�??????????�?????????�????????�???????�??????�?????�????�???�??�?� 
galvanically isolated
Hold Function Switch To freeze output current and deactivate control relays
Load Max. 600 Ohm
Resistivity Input 2-pin terminal
Connection Terminal 5-pole, 17-pole terminal, detachable blocks
LCD 7 segments display with symbols for status information
Power Supply
Input 110 VAC
(jumper selectable) ;�?????????????�????????????�???????????�??????????�?????????�????????�???????�??????�?????�????�???�??�?� 
48 to 62 Hz ; max. 7 VA
(For TSRESCTP1001)
220 VAC�?????????????�????????????�???????????�??????????�?????????�????????�???????�??????�?????�????�???�??�?� 
(jumper selectable) ;�?????????????�????????????�???????????�??????????�?????????�????????�???????�??????�?????�????�???�??�?� 
48 to 62 Hz ; max. 7 VA
(For TSRESCTP1002)
Main Fuse Slow-blow 250 V / 100 mA
Pollution Degree 2
Transient Overvoltage Category II
EMC Specifications
Emitted Interference According to EN 50081-1
Immunity To Interference According to EN 50082-1
Environmental Conditions
Operating Temperature Range -10 to 50 �?????????????�????????????�???????????�??????????�?????????�????????�???????�??????�?????�????�???�??�?�ºC
Max. Relative Humidity 80 % up to 31 °C decreasing linearly to 50 % at 40 °C
Mechanical Specifications
Dimensions (WxHxD) 96 x 96 x 175 mm
Weight 700 g (unit) / 800 g (packed)
Ingress Protection IP54 (front panel)