Alpha pH 800 pH/ORP Controllers/Transmitters

  • User Friendly Features User selectable modes to suit specific applications
  • Hold Function Switch Handily freezes output current and deactivates control relays
  • Warranty This product is covered by a 1 year warranty
Product Options


RS Hydro are proud UK distributors of the Alpha pH 800 controller/transmitter, delivering consistent performance and user friendly features this meter is the ultimate in sophistication. 2 in 1 controllers/transmitters can be configured to measure either pH or ORP (mV or %), while the seven preset buffer values provide quick and accurate auto calibration with the choice of NIST or USA selection. After each successful calibration electrode slope and offset are displayed on the large screen. The electric offset function allows direct reading corrections without needing to remove the electrode from the control system.

The Alpha pH 800 controller/transmitter provides the user with the option to use auto or manual temperature compensation and a the three wire system compensates for cable length resistance errors to ensure the best possible results.

An added feature to the Alpha pH 800 is the antimony mode which is specifically for use with antimony electrodes in applications that involve corrosive hydrofluric acid. Other user friendly options to enhance the users experience are the alarm delay and set-point hystereses in limit control mode to prevent chattering, false alarms and down time.

This device comes with a 1 year warranty.

Manufactured by: Eutech Instruments
Model: Alpha pH 800 pH/ORP Controllers/Transmitters

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Useful for any batch or on-line application that requires accurate pH or ORP control.
Water Purification/Treatment
Use for batch and on line control of incoming process water, rinse water treatmen, recirculating systemand waste water treatment
Ideal for chemical processing, food processing, aquarium, pharmaceutical, hydroponics and waste control industries


Range -2.00 to 16.00 pH
Resolution 0.01 pH
Accuracy ±0.01 pH
Range -1000 to 1000 mV
Resolution 1 mV
Accuracy ±1 mV
Range -9.9 to 125.0 °C
Resolution 0.1 °C
Accuracy ±0.5 °C
Sensor Pt100 / Pt1000 (jumper selectable); 2 or 3 wire
Compensation Auto/manual
Set Point And Controller Functions
Set point 1 (SP1) /
set point 2 (SP2)
-2.00 to 16.00 pH or -1000 to 1000 mV
Switching pH Hysteresis 0.1 to 1 pH
Switching ORP Hysteresis 10 to 100 mV
Function (Switchable) Limit control
Pickup/Dropout Delay 0 to 2000 sec
Contact Outputs 2 SPDT relays
Switching Voltage/
Max. 250 VAC / max. 3 A / max. 600 VA
Electrical Data and Connections
Transmitter Function 0/4 to 20 mA scalable outputs for pH/ORP, galvanically isolated
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 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. 0.75 VA
(For TSCTP0801)
220 VAC
(jumper selectable) ;
48 to 62 Hz ;
max. 0.75 VA
(For TSCTP0802)
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 °C
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)