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Process Control Instruments : pH : 2 Wired DC powered pH Monitor / Controller (Alpha PH500)

Our competitively priced Alpha pH500 Process Control pH meter is DC powered (12 to 24 VDC) and can be installed in serial loop making it ideal for use in power plants or any commercial sites where electrical interference can make pH readings erratic. The Alpha 500  shares many of the advanced features of the Alpha 2000 and 1000 units, such as Scaleable 4-20 mA Output for better resolved output at chart recorder and other peripheral devices Galvanically Isolated 4-20 mA Output also Two Level Password Protection preventing un authorized tampering with settings. 




Product Code

pH Range 0.00 to 14.00 pH
Resolution & Accuracy 0.01 pH & 0.01 pH
No. Of pH Calibration Points Up to 2  points
pH Buffer pH 4.01, 7.00, 10.01 (USA); pH 4.01, 6.86, 9.18 (NIST) 
ORP Range -1000 to +1000 mV
Resolution & Accuracy 1 mV & 2 mV
Temperature Range -10.0 to 110.0 C
Resolution & Accuracy 0.1 C & 0.5 C
Sensor (for ATC) PT100 (3-wire)
Temperature Compensation Automatic/Manual (0 to 100 C)
Signal Input Asymmetrical/Symmetrical
Signal Output 4 to 20 mA
Over-/under range current output 3.8 mA
Hold current output 22 mA
Power 12 to 24 VDC
Dimension 1/4 DIN (96x96 mm)

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We are proud to announce the launch of the Worlds First CFR 21 Compliant - Windows CE Driven Multi-Parameter 6000 Range of Bench Meters. Ideal for use in industries such as Pharmaceutical, Food & Drug Manufacture and Health & Human Services. Please click here for details.

We accept all major credit/debit cards - please contact us for our best possible prices!; any questions? Why not try our Technical Area where you will find an in-depth explanation of many relevant aspects within the field of electrochemistry! more..


Russell Mainstream Supply Ltd.


Cameron House, 8 Crown Square, Kingskettle, Cupar, Fife, KY15 7PW


Phone: +44 (0)1337 831192

Fax: +44 (0)1337 371192


Email: Sales@rmprocesscontrol.co.uk 



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