GMH 3511   Product-ID  604953
pH / ORP / temp. measuring device w/o accessories
GMH 3531   Product-ID  602076
pH / ORP / temp. measuring device w/o accessories
GMH 3551   Product-ID  602817
pH / ORP / temperature  measuring device with datalogger w/o accessories

• Automatic temperature compensation
• In operation mode „pH“ an automatic tempera turecompensation (ATC) is possible in the range 0 ... 105 °C if a temperature probe is connected. Otherwise a manual input of temperature is possible.
• pH calibration
• Buffer selection, temperature compensation and sensorrating a ccording to calibration result (from 10 ... 100 %) is
• done automatically.
• GMH 3511  2-point calibration with Greisinger buffer capsules (GPH 4, 7, 10)
• GMH 3531, GMH 3551  Either 1-, 2- of 3- point calibration with Greisinger standard buffer, buffer according to
• DIN19266 (A, C, D, F, G) or manual buffer selection.
• Calibration interval (not for GMH 3511)
• The device asks for a recalibration after a
• selectable time period (1 - 365 days or inactive)
• GMH 3551  Calibration history additional
• ORP measurement (Redox)
• There are 2 choices
• „mV“  standard ORP or mV measurement
• „mVH“  temp. compensated conversion to hydrogen
• system acc. to DIN38404 part 6, table 1
• based on the standard ORP electrode (e.g.
• GE105 with Ag/AgCl system and 3 mol KCl)
• used.
• rH measurement  (except GHM 3511)
• Calculation of the rH value by means of a ORP measurement and by manually entering the pH-value.
• The pH-value may also be taken from a previous pH measurement.
• Analog output 0 ... 1 V, not changeable 0 ... 1 V = 0 ... 14 pH or -2000
• ... 2000 mV, connection via 3-pole jack socket Ø 3.5 mm,
• resolution 13 bit, accuracy 0.05 % at nominal temperature GMH 3551  Analog output freely scalable
• data logger (GMH 3551 only)
• cyclic 10,000 data sets, manual  1,000 data sets (with measuring point input, 40 adjustable measuring point texts or measuring point numbers).

GMH 3511   Product-ID  604953
pH / ORP / temp. measuring device w/o accessories
GMH 3531   Product-ID  602076
pH / ORP / temp. measuring device w/o accessories
GMH 3551   Product-ID  602817
pH / ORP / temperature  measuring device with datalogger w/o accessories

• Automatic temperature compensation
• In operation mode „pH“ an automatic tempera turecompensation (ATC) is possible in the range 0 ... 105 °C if a temperature probe is connected. Otherwise a manual input of temperature is possible.
• pH calibration
• Buffer selection, temperature compensation and sensorrating a ccording to calibration result (from 10 ... 100 %) is
• done automatically.
• GMH 3511  2-point calibration with Greisinger buffer capsules (GPH 4, 7, 10)
• GMH 3531, GMH 3551  Either 1-, 2- of 3- point calibration with Greisinger standard buffer, buffer according to
• DIN19266 (A, C, D, F, G) or manual buffer selection.
• Calibration interval (not for GMH 3511)
• The device asks for a recalibration after a
• selectable time period (1 - 365 days or inactive)
• GMH 3551  Calibration history additional
• ORP measurement (Redox)
• There are 2 choices
• „mV“  standard ORP or mV measurement
• „mVH“  temp. compensated conversion to hydrogen
• system acc. to DIN38404 part 6, table 1
• based on the standard ORP electrode (e.g.
• GE105 with Ag/AgCl system and 3 mol KCl)
• used.
• rH measurement  (except GHM 3511)
• Calculation of the rH value by means of a ORP measurement and by manually entering the pH-value.
• The pH-value may also be taken from a previous pH measurement.
• Analog output 0 ... 1 V, not changeable 0 ... 1 V = 0 ... 14 pH or -2000
• ... 2000 mV, connection via 3-pole jack socket Ø 3.5 mm,
• resolution 13 bit, accuracy 0.05 % at nominal temperature GMH 3551  Analog output freely scalable
• data logger (GMH 3551 only)
• cyclic 10,000 data sets, manual  1,000 data sets (with measuring point input, 40 adjustable measuring point texts or measuring point numbers).