Elektrode pH InPro series

InPro2000 pH / redox electrodes are the standard for measurement accuracy. A patented silver ion trap prevents sulfide poisoning of the electrodes, and a range of reference electrolytes ensures optimal compatibility with industrial media. These and other features make the InPro 2000 and 465-50 probes perform very reliably in conditions that would quickly damage other electrodes. With careful maintenance, these probes can provide excellent performance for many years. Models equipped with Intelligent Sensor Probe Management (ISM) technology additionally provide predictive diagnostics, allowing maintenance to be scheduled according to the needs of the probe. This makes maintenance easier and more efficient, while increasing process reliability.

The InPro3100 electrode is a pH electrode with an integrated temperature sensor, designed to provide in-line pH measurements in biotechnology processes that use CIP and SIP cleaning procedures. This rugged gel electrode provides fast and accurate measurements, even after multiple autoclaving and sterilization cycles at 140°C. The electrode uses METTLER TOLEDO's patented silver ion trap, which keeps the diaphragm clean even in sulfide-containing solutions. The InPro3100UD electrode can also be mounted upside down.

InPro3250 / InPro3250SG / InPro3250i / InPro3252 / InPro3252i electrodes are probes with pressurized liquid electrolyte and a temperature sensor.They have low maintenance requirements and are pre-filled with pressurized liquid electrolyte. The electrode is particularly suitable for applications found in biotechnology and the chemical and pharmaceutical industries. InPro3250 series electrodes are available with membranes made of different types of glass. This makes it possible to achieve the best possible measurement performance under various operating conditions.

The InPro4010 electrode is a low-maintenance, cost-effective pH sensor for monitoring standard processes involving industrial wastewater, for example. This electrode has an internal temperature sensor that provides both an accurate reading and temperature compensation. The polymer electrolyte remains in direct contact with the medium under test, a solution that eliminates the risk of clogging.

InPro 4260 sensors incorporate the new XEROLYT® EXTRA reference polymer, which improves pH measurement precision and extends probe life even in the harshest industrial environments. The InPro 4260 sensors are supplied with an open connector, eliminating the problem associated with a blocked diaphragm in applications using viscous media, containing large amounts of particles or agents containing sulfide. With other connectors, electrical contact between the reference element and the medium would be quickly lost. In addition, frequent sensor cleaning or even unscheduled replacements are also required.

The InPro4550VP polymer electrode is easy to use. With VarioPin connector, it is designed for direct mounting. It has a built-in temperature sensor and an auxiliary grounding system with diagnostics. The electrode is designed for chemical applications involving high temperature and/or pressure. The electrode is designed for chemical applications involving high temperature and/or pressure.

The InPro4501VP electrode is a rugged pH electrode with a PVDF shaft. It has a built-in temperature sensor and an auxiliary grounding system with diagnostics. It is designed for chemical applications with high flow rates of the test medium. The probe is also available with a fixed cable.

Technical specification:

Technical specification	InPro3250 / InPro3250SG / InPro3250i / InPro3252 / InPro3252i	InPro2000 / InPro2000i / InPro2002 / InPro2002i	InPro3100 / InPro3100UD / InPro3100i	InPro4010	InPro4260(i) / InPro 42811	InPro4550VP	InPro4501NP
Number of membranes	1	1, 2 or 3 depending on the electrolyte	1	2	/	/	/
Silver ion trap	yes	yes	yes	no	/	/	/
Membrane	ceramic	ceramic	ceramic	open aperture connector	/	open ring connector	open ring connector
pH range	0-14 (InPro3250) 0-12 (InPro3253)	0-14	0-14	2-12	0-14 pH InPro 4260(i) 2-12 pH InPro 4262(i) InPro4281i	0-14	0-15
Pressure resistance (bar)	overpressure up to 4 bar	overpressure upto 6 bar	overpressure up to 6 bar	2 bar / 60°C	/	0,,,8bar (130°C)	0-7 bar up to 65 °C 3,5 bar at 100°C
Pressure resistance (psi)	overpressure up to 58 psi	overpressure up to 87 psi	overpressure up to 87 psi	29 psi / 140 °F	/	0-116 psi	0-100 psi up to 150°F 50 psi at 212 °F
Reference system	system Argenthal	system Argenthal	system Argenthal	system Argenthal	system Argenthal	system Argenthal	system Argenthal
Sterilizable	yes	yes	yes	no	no	no	no
Temperature range	0 - 140 °C	0 - 140 °C	0 - 140 °C	0 - 60 °C	0 - 130 °C	0 - 130 °C	0 - 100 °C
Autoclavable	yes	yes	yes	no	no	no	no
FM approvals	IS/ I, II, III/1 / ABCDEFG /T6	IS/I, II, III/1 / ABCDEFG /T6	S/I, II, III/1 / ABCDEFG /T6	/	S/I, II, III/1 / ABCDEFG /T6	S/I, II, III/1 / ABCDEFG /T6	/
ATEX certificates	SEV 14 ATEX 0168 X Ex ia IIC T6/T5/T4/T3 Ga/Gb	SEV 14 ATEX 0168 X Ex ia IIC T6/T5/T4/T3 Ga/Gb	SEV 14 ATEX 0168 X Ex ia IIC T6/T5/T4/T3 Ga/Gb	/	SEV 14 ATEX 0168 X Ex ia IIC T6/T5/T4/T3 Ga/Gb	SEV 14 ATEX 0168 X Ex ia IIC T6/T5/T4/T3 Ga/Gb	/
IECEx certificates	IECEx SEV 14.0025X Ex ia IIC T6/T5/T4/T3 Ga/Gb	IECEx SEV 14.0025X Ex ia IIC T6/T5/T4/T3 Ga/Gb	IECEx SEV 14.0025X Ex ia IIC T6/T5/T4/T3 Ga/Gb	/	IECEx SEV 14.0025X Ex ia IIC T6/T5/T4/T3 Ga/Gb	IECEx SEV 14.0025X Ex ia IIC T6/T5/T4/T3 Ga/Gb	/
ISM	yes	yes	yes	no	/	no	no
Technical data	Low-maintenance pH electrode with an additional electrode grounding system	Liquid electrolyte filling pH electrode with temperature sensor	Low maintenance pH electrode with temperature sensor	Combination pH/temperature electrode with low maintenance requirements	/	pH electrode with low maintenance requirements, with shaft made of PSS	Low-maintenance pH electrode with a shaft made of PVDF
Pressure	/	/	/	/	15 barg at 25°C, 7 barg at 130°C	/	/
Grounding	/	/	/	/	/	yes	yes