Product Details

Alpha pH1000 1/4 DIN pH/ORP Controller / Transmitter


Product Features

:: Built-In Programmable Limit, Proportional (Pulse Length or Pulse Frequency) - ideal for precision process control applications

:: User-Customization through Advanced Setup Menu offers flexibility in matching the controllers  functions to suit individuals specific requirement

:: Automatic Calibration with Auto-Buffer Recognition eliminates mistakes during calibration

:: Symmetrical Mode Operation eliminates electronic noise problems when used with solution ground

:: One-Point Online Calibration without shutting down the line

:: Hold Relay for use with float switches/flow switches and other controllers as a failsafe function

:: Two Level Password Protection prevents un authorized tampering with settings

:: 0 to 2000 Second Time Delay Adjustment on control and alarm delays

:: Galvanically Isolated Scaleable 0-20/4-20 mA Outputs for pH/ORP

:: Wash Contact Relay controls electrodes cleaning systems at desired duration and frequency

:: Choice of Glass or Antimony Electrode for general purpose or hydrofluoric acid applications

:: Adjustable Hysteresis (Dead Band) prevents rapid contact switching near set point

:: Non-Volatile Memory retains all stored parameters and calibration data even if power fails

:: Large Dual Display shows pH (or ORP) with temperature simultaneously - features clear multiple icons, set points, and status messages

:: Choice of Temperature Sensor Pt100/Pt1000 with 2-wire or 3-wire temperature input selection

:: Easy Installation and Wiring with detachable plug-in connectors


Product Specification


pH Range

-2.00 to 14.00 pH

Resolution & Accuracy

0.01 pH & ±0.01 pH

mV Range

-1000 to 1000 mV / 0 to 100% (for -100 to 100 mV)

Resolution & Accuracy

1 mV / ±0.1% & ±1 mV

Temperature Range

-9.9 to 125 °C

Resolution & Relative Accuracy

0.1 °C & ±0.5 °C

Temperature Sensor

Pt 100/ Pt 1000 (jumper selectable)

Temperature Compensation

Auto / Manual (reference at 25 °C)

Set Point and Controller Functions

Function (Switchable)

P/PI control (Pulse Length / Pulse Frequency); Limit Control; Off


0.1 to 1 pH or 1 to 10.0% / 10 to 100 mV

Adjustable Period with Pulse Length Controller

0.5 to 20 seconds

Adjustable Period with Pulse Frequency Controller

60 to 120 pulses/min

Proportional Range

10 to 500%

Integral Action Time (IAT)

0 to 999.9 minutes

Pickup / Dropout Delay

0 to 2000 seconds

Switching pH Hysteresis

0.1 to 1 pH

Switching ORP Hysteresis

1 to 10.0% / 10 to 100 mV

Contact Outputs, Controller

2 potentialfree change-over contacts

Switching Voltage / Current / Power

Max 250 VAC / Max 3A / Max 600VA

Alarm Functions

Function (Switchable)

Launching or Pulse

Wash Cycle

0.1 to 199.9 hrs

Wash Direction

1 to 9999 s

Pickup Delay

0 to 2000 seconds

Switching Voltage / Current / Power

Max 250 VAC / Max 3A / Max 600VA

Electrical Data and Connections

Power Requirement

100/ 2200CD (jumper selection)


48 to 62Hz

EMC Specifications

Emissions: according to EN 50081-1
Susceptibility: according to EN 50082-1

Signal Output

0/4 to 20mA, galvanically isolated


Max. 600 Ω


BNC, screw terminals

Connection Terminal

Terminal blocks 5-pole/ 17-pole, removable

Main Fuse/ Fine Wire Fuse

Slow-blow 250 V/ 100 mA

Environmental Conditions

Pollution Degree


Transient Overvoltage Category



Up to 2000 m

Maximum Relative Humidity

80% up to 31°C decreasing linearly to 50% at 40°C

Power Supply

Mains supply voltage fluctuations not exceeding 10% of the nominal voltage

Ambient Temp. Operating Range

-10 to 50 °C

Mechanical Specifications


175 x 96 x 96 mm


Max. 0.7kg


ABS with polycarbonate


IP 54/ IP 40

Ordering Information

Order No.


TSPHCTP1002 Alpha pH 1000 pH / ORP Differential Controller / Transmitter with 0/4-20mA output and 220VAC setting (unit only)


Download Brochure

Alpha 800 & 1000 Series


Related Accessories

pH ORP Process Electrodes
Calibration Solutions

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