Alpha pH 2000 pH/ORP Controller/Transmitter

  • Choice of Mounting Options Mounting options to suit individual needs
  • Warranty This product comes complete with a one year warranty
  • Choice of Modes User can choose between measuring modes to achieve the most accurate results
Product Options


The Eutech Alpha 2000 pH/ORP Controller/Transmitter is intuitive whilst being user friendly. It has been designed and built for use in rugged industrial environments, it has been cased in an IP65 NEMA 4X casing which provides weatherproof and corrosion-resistant protection against harsh elements. The Alpha 2000 has symmetrical mode of operation as standard which is the perfect solution for use in electrically noisy environments. To take full advantage of this feature the user must have an electrode with a solution ground (potential matching) pin. If this is not the case and the electrode does not have a solution ground the meter must be set to Asymmetrical mode. A wide pH range of -2.00 to 16.00 pH is delivered to two decimal accuracy and when set to ORP mode measurements are in mV or % concentration with independent calibration modes.

This user friendly controller/transmitter alerts the user when the meter or electrode requires maintenance and provides all the necessary trouble-shooting prompts that will ever be required. After each calibration the meter displays the electrode status whilst the quick, easy push button calibration is complete with auto-buffer recognition. A helpful feature for ease of use is the ability to control and measure pH and ORP simultaneously with the use of 'master-slave' operation this is achieved by placing two controllers side by side.

The Alpha pH 2000 pH/ORP Controller/Transmitter has the option of being used in Asymmetrical or Symmetrical modes the difference is:


This is the optimum choice for working in environments where there is little or no electrical noise. In environments where electrical noise is present the noise acts as a common signal and is picked up by both the pH and the reference electrodes. However, since the reference electrode is grounded to the ground potential of the amplifier, electrical noise will be present only on the pH electrode, this noise in turn will be amplified along with the pH signal casuing reading fluctuations in an electrically noisy atmosphere. Electrical noise from a DC source (as in an electroplating tank) will typically result in stable but incorrect values.


Symmetrical mode works by avoiding grounding the reference electrode by reconfiguring the input to a floating differential mode. The result of this is electrical noise appears equally on the pH and reference electrodes and is in turn rejected by the operational amplifier.

Manufactured by: Eutech Instruments
Model: Alpha pH 2000 pH/ORP Controller/Transmitter

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Use for virtually any batch or online applications where rapid, accurate control is required. Great for OEM/system integrator
Use in applications involving agriculture, chemical processing, boiler and water heaters, water-fab, microprocessor manufacturing, pharmaceuticals, pulp and paper industries and bleach manufacturing
Hook to recorder to document data for regulatory compliance
Water Purification/Treatment
Use to treat batches of incoming process water, ultrapure water, boiler and feed water control


Range -2.00 to 16.00 pH
Resolution 0.01 pH
Accuracy ±0.01 pH
Range -1000 to 1000 mV / 0 to 100 %
Resolution 1 mV / 0.1 %
Accuracy ±1 mV / ±0.2 %
Range -10.0 to 125.0 °C / 14.0 to 257.0 °F
Resolution 0.1 °C / 0.1 °F
Accuracy ±0.5 °C / ±1.0 °F
Sensor Pt100 / Pt1000 (jumper selectable); 2 or 3 wire
Compensation Auto/manual (independent process/CAL temperature)
Set Point and Controller Functions
Set Point 1 (SP1)/ Set Point 2 (SP2) -2.00 to 16.00 pH or -1000 to 1000 mV or 0 to 100 %
Switching pH Hysteresis 0.1 to 1 pH
Switching ORP Hysteresis 10 to 100 mV or 1 to 10.0 %
Function (Switchable) P/PI control (pulse length/pulse frequency/proportional integral); limit control; off
Adjustable Period with Pulse Length Controller 0.5 to 20 sec
Adjustable Period with Pulse Frequency Controller 60 to 120 pulse/min
Integral Action Time (IAT) 0 to 999.9 min
Pickup/Dropout Delay 0 to 2000 sec
Wash Cycle 0.1 to 200.0 hr
Wash Duration 1 to 2000 sec
Contact Outputs 1 SPDT, 3 SPST relays
Switching Voltage / Current / Power 1/8 HP: at 125 VAC / max. 0.74 A / max. 93 VA
1/8 HP: at 250 VAC / max. 0.37 A / max. 93 VA
Alarm Functions
Function (Switchable) Steady or fleet (pulse)
Pickup Delay 0 to 2000 sec
Switching Voltage / Current / Power 1/8 HP: at 125 VAC / max. 0.74 A / max. 93 VA
1/8 HP: at 250 VAC / max. 0.37 A / max. 93 VA
Electrical Data and Connections
Transmitter Function Two 0/4 to 20 mA scalable outputs for pH/ORP and temperature, galvanically isolated
CU22 Function 22 mA current output
Isolated Output Voltage 12 V ±0.5 V (max. 50 mA)
Hold Function Switch To freeze output current and deactivate control relays
Load Max. 600 Ohm
pH / ORP Input BNC (1012 impedance); asymmetrical/symmetrical
Connection Terminal 3-pin, 8-pin, 9-pin & 13-pin terminal, detachable blocks
(For TSPHCTP2000W)
3-pin, 9-pin & 19-pin terminal, detachable blocks
(For TSPHCTP2000P)
LCD UV coat, backlit 14 segments display with symbols for status information
Backlight On/off selectable with four levels of brightness control
Power Supply
Input 80 to 250 VAC/DC ; 50/60 Hz ; 10 VA
Main Fuse 250 mA, anti-surge,
S504 Bussmann
Pollution Degree 2
Transient Overvoltage Category II
EMC Specifications
Emitted Interference According to EN 61326
Immunity to Interference According to EN 61326
Environmental Conditions
Operating Temperature Range 0 to 40 °C
Max. Relative Humidity 80 % up to 31 °C decreasing linearly to 50 % at 40 °C
Mechanical Specifications
Dimensions (WxHxD) 144 x 144 x 110 mm (For TSPHCTP2000W)
96 x 96 x 175 mm (For TSPHCTP2000P)
Weight 745 g (unit) / 1100 g (packed) (For TSPHCTP2000W)
550 g (unit) / 950 g (packed) (For TSPHCTP2000P)
Ingress Protection IP66 (NEMA 4X) (For TSPHCTP2000W)
IP54 (front panel) (For TSPHCTP2000P)