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.
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.
Range 0.00pH to 14.00pH
Temperature Range -10°C to 110°C
MillivoltRange -1000mV to 1000mV
Temperature Compensation Auto (Pt100) / Manual (0° to 100°)
Number of Calibration Points 2
Calibration Buffers 4.01, 7.00, 10.01
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
500/0034 Complete pH probe assembly: pH600, 762 holder, electrodes and 40cm wand