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Eutech Instruments

Eutech Instruments

1/8 DIN pH/ORP Controller Eutech alpha-pH200


Industrial Process Controllers & Monitors

alpha,pH200,1/8 DIN,pH,ORP,Controller,Eutech,Instrumentsalpha-pH200 1/8 DIN pH/ORP Controller

  • User-Customisation through Scrolling Menu, 14-Segment LED - intuitive user interface guides user easily through setup functions

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

  • Galvanically Isolated 4-20 mA Output for remote monitoring or hardcopy recording

  • Universal Power Supply Input from 85 to 250 VAC/DC allows use at multiple sites and withstands voltage fluctuations

  • Two Level Password Protection prevents un authorized tampering with settings

  • Automatic Temperature Compensation with 3-wire Pt 100 system ensures accurate readings under fluctuating temperatures

  • 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

  • Easy Installation and Wiring with detachable plug-in connectors

alpha,pH200,1/8 DIN,pH,ORP,Controller,Eutech,Instruments E-Brochure

alpha,pH200,1/8 DIN,pH,ORP,Controller,Eutech,Instruments Instruction Manual


General: Ideal for virtually any batch type application where pH or ORP control or adjustment is needed. Use as ORP monitor for ozone systems and general purpose pH monitor for all types of water treatment and chemical processes.

Aquaculture: Use for pH or ORP control in fish ponds and tanks.

Industrial: Use to treat batches of incoming process water, rinse water treatment, recirculating system and wastewater treatment. Suitable for pH or ORP control of plating tanks and chemical processing tanks. Ideal for low cost monitor with alarms for batch and process applications. Perfect for wastewater neutralization in small and medium sized batches.


Product Specification

pH Range
0.00 to 14.00 pH
Resolution & Accuracy
0.01 pH & 0.01 pH
mV Range
-999 to 1000 mV
Resolution & Accuracy
1/ 2 mV
Temperature Range
-10 to 110 C
Resolution & Relative Accuracy
0.1 C & 0.5 C
Temperature Sensor
Pt 100 (3-wire)
Temperature Compensation
Auto / Manual (0C to 100C)
Set Point and Controller Functions
Limit Control
Switching pH/ORP Hysteresis
0.00 to 2.00 pH or 0 to 300 mV
Contact Outputs, Controller
2 SPDT relays
Switching Voltage/ Current/ Power
Max 250 VAC/ Max 3A/ Max 600 VA
Electrical Data and Connections
Power Requirement
85 to 260 VAC, 50/60 Hz or DC
Signal Output/ Load
4-20mA galvanically isolated / 200Ω
pH/ORP Input
BNC (1012 Ω Impedence)
Connection Terminals
3 detachable connectors (3-pin; 7-pin & 9-pin terminal blocks)
Main Fuse
250mA, Anti-surge (BUSSMAN S504 + 250mA)
Environmental Conditions
Maximum Relative Humidity
80% up to 31C decreasing linearly to 50% at 40C
Ambient Temp. Operating Range
-10 to 50 C (14 F to 122F)
Mechanical Specifications
96 x 48 x 150 mm
300 g (boxed)


About Us

Metex Corporation Limited has been providing superior products and services to the process control, chemical treatment, waste water, industrial and manufacturing industries for over 25 years. It is our goal to continually provide our customers with the best possible equipment, technology, and service.


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