SENSOLUTION™ PH600/762

pH Probe Assembly

The pH600/762 pH probe assembly is a loop-powered, isolated pH sensor, with all power being supplied from the two-wire current loop connection. Isolation enables the probe to be at a potential relative to ground without affecting the integrity of the measurement. The two-wire connection eliminates the requirement of a separate supply in addition to the loop supply voltage.


Features:


  • Temperature-compensated pH or ORP measurement

  • Two-wire field mounted transmitter – suitable for multiple-loop installations with a central controller

  • Local display of pH/ORP and temperature – suitable for use as a stand-alone pH monitor

  • Isolated 4-20mA signal

  • Simple pushbutton operation

  • Tough IP65 die-cast Aluminium enclosure

  • Plug and socket connectors for easy installation and maintenance

  • Tool-free operation – no dip-switches or potentiometers

  • Suitable for masthead mounting (as pictured) or wall mounting


With a Model 762 probe assembly and electrodes, the pH600 transmitter becomes a complete pH sensing unit. The pH600 transmitters include all the circuitry necessary for the measurement and transmission of an isolated 4-20mA linear signal. All the transmitter’s functions are accessible through the pushbutton interface – there are no potentiometers or dip-switches. Two-point calibration of the signal is accomplished using the standard calibration routine. The pH600 can also temperature compensate pH readings using a 100Ω TC element.


The Model 762 assembly is manufactured from chemically resistant polypropylene and has spaces for two PG13.5 electrodes – a rugged glass pH electrode and glass temperature compensator. The reference is a double-junction arrangement with a large gel reservoir giving excellent stability in tough applications.

Tecnical Specifications:


pH

Range 

0.00pH to 14.00pH

Resolution 

0.01pH

Accuracy 

±0.01pH

Temperature Range 

-10°C to 110°C

Resolution 

0.1°C

Accuracy 

±0.5°C

MillivoltRange 

-1000mV to 1000mV

Resolution 

1mV

Accuracy 

±2mV


General

Temperature Compensation 

Auto (Pt100) / Manual (0° to 100°)

Number of Calibration Points 

2

Calibration Buffers 

4.01, 7.00, 10.01

Inputs 

Asymmetrical/Symmetrical

Outputs 

4.0mA to 20.0mA

Under-range Current Output 

3.8mA/4mA (selectable)

Over-range Current Output 

3.8mA/20mA (selectable)

Hold Current Output 

22mA/Last Value (selectable)

Display 

Custom LCD

Power Requirements 

12V to 24V dc

Load Resistance 

600 ohm Max

Ordering Information:


500/0034 Complete pH probe assembly


For use with:

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Spares:

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Part of the SDI group

Astles Control Systems Ltd

B3 Regent Park, Summerlys Road,

Princes Risborough, Bucks, HP27 9LE

t: 01844 273301

e: web.sales@astles.co.uk

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