Fluoride Probe Assembly
The pH600/762 fluoride probe assembly is a loop-powered, isolated fluoride 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.
Two-wire field mounted transmitter – suitable for multiple-loop installations with a central controller.
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.
With a Model 762 probe assembly and electrodes, the pH600 transmitter becomes a complete fluoride/RmV sensing unit. The pH600 transmitters include all the circuitry necessary for the measurement and transmission of an isolated 4-20mA signal, which is then linearised in. All the transmitter’s functions are accessible through the pushbutton interface – there are no potentiometers or dip-switches. Calibration of the signal is accomplished using a one-point offset to grab. The pH600 can also temperature compensate readings using a 100Ω TC element.
The Model 762 assembly is manufactured from chemically resistant polypropylene and has spaces for two PG13.5 electrodes – an industrial fluoride ISE electrode and glass temperature compensator. The reference is a double-junction arrangement with a large gel reservoir giving excellent stability in tough applications.
Range 0.1ppm to 100.0ppm
Range 50mV to -186mV
Temperature Range -10°C to 110°C
Temperature Compensation Auto (Pt100) / Manual (0° to 100°)
Number of Calibration Points 1 (offset to grab sample)
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
500/0060 Complete Fluoride probe assembly: pH600, 762 holder, electrodes and 40cm wand