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Hanna’s exclusive Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption, which are typical risks in industrial environments. An alarm condition is indicated by a red LED, located directly on the front panel of the controller
In a system with poor grounding, it is possible to have a ground current flowing through the reference junction. This can cause a rapid degradation of the electrode. The Hanna differential input reduces the likelihood of ground loops.
Slows the pump down when the measured pH level approaches the set value, which ensures precise dosage and avoids costly waste of chemicals due to overdosage.
To enhance troubleshooting and the ability to record data while monitoring, simply attach a recording device to the instrument’s 4 to 20 mA output contacts, conveniently located on the front panel, to obtain a hard copy of the results on demand.
RS232C port allows for connection to a PC. Data transmission from the instrument to the PC is possible with the HI 92500 Windows® compatible application software offered by Hanna Instruments.
A 2-wire Pt100 can be connected to provide automatic temperature compensation of measurements.
0.0 to 14.0 pH
0.1 % pH
automatic, one, two or three point, at pH 4.01, 7.01, 10.01
automatic (with Pt100 probe) or manual from -9.9 to 120°C
1 contact output SPDT, 5A-250 VAC, 5A-30 VDC (resistive load), fuse protected (2A, 250V fast fuse)
Analog Output Signal
galvanically isolated: 0-1 mA, 0-20 mA and 4-20 mA,0-5 VDC, 1-5 VDC and 0-10 VDC
Digital Output Signal
RS232 bi-directional optoisolated
1 or 2 contact outputs SPDT 5A-250 VAC, 5A-30 VDC (resistive load), fuse protected (2A, 250V fast fuse)
adjustable, typically from 5 to approximately 30 minutes
115 VAC ±10%; 50/60 Hz
144 x 144 x 170 mm
140 x 140 mm
1.6 kg (3.5 lb.)
Each pH 500 model is supplied complete with mounting brackets and instructions.