SENSOLUTION™ Model 762 - pH

pH Probe Assembly

The model 762 pH probe assembly is a loop-powered, isolated pH sensor, with all power being supplied from the two-wire current loop connection. The two-wire connection eliminates the requirement of a separate supply in addition to the loop supply voltage.


The model 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 analyser – 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 the inclusion of a pH800 analyser the Model 762 probe assembly and electrodes become a complete pH sensing unit. Theanalyser includes all the circuitry necessary for the measurement and transmission of an isolated 4-20mA linear signal. 


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.

Technical 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 

24V dc

Load Resistance 

600 ohm Max

Ordering Information:


500/0034 Complete pH probe assembly

500/0080 pH800 analyser