Electronic transmitter / controller for the continuous measurement ofthe pH value or 

Redox (ORP) in water. 

Transmitter AMU pH-Redox 

•Measuring and control transmitter for panel 

installation in a Noryl® resin enclosure, 

96 x 96 x 120 mm (DIN 43700). 

•Measuring range: 

0 to 14 pH respectively -500 to +1500 mV 

•Sensor connections for a pH or ORP sen-sor, reference electrode, Pt1000 tempera-ture and for a digital sample flow meter. 

•Galvanically separated sensor connections. 

•Automatic temperature compensations 

according to Nernst with or without correc-tion functions. 

•Values for pH buffer solutions and redox 

calibration solution programmable. 

•Big backlit LC display for measuring value, 

sample temperature, sample flow and op-erating status. 

•Easy user menus in English, German, 

French and Spanish. Simple programming 

of all parameters by keypad. 

•Data logger for 1'500 data records stored 

at a selectable interval. Serial interface in-cluded for data download to PC with Mi-crosoft HyperTerminal. 

•Overvoltage protection for in- and outputs. 

•Two current outputs (0/4 - 20 mA) for con-ductivity and temperature signals. 

•Potential-free alarm contact as summary 

alarm indication for programmable alarm 

values and for instrument faults. 

•Two potential-free contacts programmable 

as limit switch or PID-control. 

•Input for potential-free contact to freeze 

the measuring value or to interrupt control 

in automated installations (hold function or 

remote-off). 

Front panel 

Rear panel with electrical connections 

Order scheme  Transmitter AMU pH-Redox  A – 1 1 . 4 3 1 . X 0 X 

↑    ↑

Power supply ^^^….. 100 - 240 VAC / 50/60 Hz ^^^^^^^^…............. 1  |

24 VDC, direct current ^^^^^^^^^^^. 2  |

Communication option ^…. None ^^^^^^^^^^^^^^^^….…... 0 

Profibus DP interface ^^^^^^^^^^^^…........... 2 

Modbus interface (for Webserverconnection) ............................................................... 4