Identified by colour-coded labels. Tolerance ±0.03 pH.

Basic pH combination electrodes, with plastic body, gel reference system. SenTix^® 20 with plug head (AS/DIN or AS/BNC cable combination please order separately). Sentix 21-3 and Sentix 41-3 with 3 m fixed cable.

To DIN/NIST. Supplied in 250ml bottles. Tolerance ±0.02 pH.

Standard pH combination electrodes with glass shaft, non-solid electrolytes. With fixed cable (1m). SenTix^® 60 with screw head (AS/DIN or AS/BNC cable combination please order separately).

Low maintanance pH electrodes with plastic shaft and gel electrolyte, with built-in temperature sensor NTC 30 kOhm. With waterproof digital connector, cable length 1.5 m, SenTix^® 940-3 with 3 m cable.

For the SensoLyt^® armature, for the installation in a flow vessel or in a replacement fitting

• For drinking water, wastewater or in the process
• Also for high pressure and temperature conditions
• Easy to maintain by easy measuring chain replacement

For connection to WTW IDS measuring instruments.

IDS conductivity cell probe TetraCon^® 925:
Intelligent digital 4-pole cell with integral temperature sensor. Automatical transfer of the cell constant. Cable length 1.5 metres. Measuring range: 1µS/cm to 2S/cm.
TetraCon^® 925-3:
Like TetraCon^® 925, but cable length 3 m

IDS conductivity cell probe TetraCon^® 925/LV:
Intelligent digital 4-pole cell with integral temperature sensor. Fork design, suitable for small volumes (at least 2.5ml) as well as for viscous samples. Automatical transfer of the cell constant. Cable length 1.5 metres. Measuring range: 1µS/cm to 2S/cm.

IDS conductivity cell probe LR 925/01:
Intelligent digital 2-pole cell with integral temperature sensor and flowthrough cell D 01/T for measuring of low conductivity values (<1µS/cm) e.g. in boiler feed water or ion exchange water. Automatical transfer of the cell constant. Cable length 1.5 metres. Min./max. immersion depth 35/110mm and flow through measurement. Measuring range: 0.01µS/cm to 200µS/cm.

Electrolytes are used as refill solutions for liquid filled electrodes as well as a storage solution for all types of pH electrodes. With the pepsin cleaning solution, you can remove protein precipitation from the diaphragm of electrodes with liquid electrolyte.

Test resistors and calibration solutions to test the meters with conductivity function as well as to calibrate the system from the device and conductivity measuring cell

• Optimal measuring safety by PTB/NIST traceable standard solutions
• Easy device check by highly precise test resistors
• Pharmacopeia conforming test kits

Reliable Documentation for pH measurement, if desired also available with built-in printer. A modern backlit graphic display with menu controlled user interface allows easy and intuitive operation. The mini USB-B interface provides fast data transfer to a PC. The internal memory can record up to 5000 GLP complying data including ID, date and time. The housing and the keypad are easy-to-clean. Up to five calibration points cover almost the complete pH range. A calibration history of the 10 last calibrations allows conclusions on the state of the sensor. An integrated thermal printer (58mm width) is ready for printout of the measured data (option). Supplied with: meter, power supply, stand and USB cable.

With glass shaft, Ag/AgCl reference system, connections for AS/DIN, AS/DIN-3, AS/BNC, S7 plug head.

Optical IDS D.O. sensor for portable MultiLine^® IDS and InoLab^® Multi IDS benchtop meters. Measures the dissolved oxygen according DIN ISO 17289:2014-12. For applications in the lab and in process, outdoor and waste water treatment plants. Low maintenance (t99 < 60 s). No oxygen consumption, with inclined membrane for avoiding air bubbles. Factory calibrated membrane with smart chip. Built-in NTC 30 kOhm temperature sensor.

Suitable for all laboratory and field electrodes except StirrOx^® G.

The ProfiLine hand-held conductivity meters have a waterproof (IP 67) housing and a completely sealed silicone membrane keypad with tactile feedback. A separate battery compartment allows easy exchange of standard alkaline, or rechargeable, batteries. The carefully laid out, large displays indicate the reading and other important information. The 3310 series meters have a backlit, graphics display and menu-controlled operation. A selection of application specific conductivity cells cover virtually all measurement tasks.
Comfortable and versatile conductivity meter with integral, time controlled, data logger and 5000 GLP-compliant record memory for extended data collection. Menu controlled, with backlit, graphics display for comfortable, safe operation. Wide range of conductivity cells attachable. GLP-supporting functions, enhanced choice of cell constants, automatic and manual temperature compensation (which can be switched off) with linear and non-linear functions for pure water and natural waters acc. to EN 27888.

The WTW ProfiLine, hand-held, pH/mV meters are robust and waterproof, according to IP67. They have LCD or graphics displays. The proven DIN socket for connecting pH electrodes permits pH measurement even in wet environments. The instruments can be operated by standard alkaline or rechargeable batteries.
Make testing of pH and redox potential simple. Easy operation virtually eliminates errors. All function keys of the 3110 can be operated even when wearing gloves; automatic calibration and AutoRead functions ensure stable and reproducible results. The multifunctional display for pH, mV and temperature is always easy to read.

Connection cable for pH electrodes with plug head connection to plugs as indicated.

For all pocket measuring devices for analog measuring cells from the 3xx series, as well as all inoLab laboratory measuring devices for analog measuring cells.

Standard conductivity cell probe TetraCon^® 325:
4-pole cell with integral temperature sensor. Measuring range: 1µS/cm to 2S/cm.

Special conductivity cell probe TetraCon^® 325/C:
As TetraCon^® 325, 4-pole cell with integral temperature sensor, but with sensor head made of chemically resistant PEEK. Measuring range: 1µS/cm to 2S/cm

A: Stored in photoLab^® S6, S12, photoLab^® 6000/7000 Serie and photoLab^® Spectral
B: Stored in photoLab^® S12, photoLab^® 6000/7000 Serie and photoLab^® Spectral
C: Stored in photoFlex^® STD, photoFlex^® pH and photoFlex^® Turb
D: Stored in photoLab^® 6000/7000 series

Reagent-free tests:
COD, Nitrate, Nitrite optical reagent-free measurement in sewage plant outlets
Cu - copper plating bath, 690nm, 820nm - copper plating bath - B
CrO₃ - chromium plating bath - chromium plating bath - B
Ni - nickel plating bath - nickel plating bath - B
HZ - Hazen colour - Hazen colour - B
IFZ - iodine number, 340nm, 455nm - iodine number - B
m-1 (DFZ) - colouring - FB445 - B, C
m-1 (DFZ) - colouring - FB525 - A, C
m-1 (DFZ) - colouring - FB620 - B, C
FAU - turbidity 620 - T620 - B
E - extinction - extinction - A, B, C
SAK - Spectral absorption coefficient at 254 and 436nm photoLab^® 6100 VIS (436nm) and photoLab^® 6600 UV-VIS (254/436nm)

Further tests and checking aids like standards and reagent solutions for the instruments on demand, range information is based on max. range and can also be smaller for pHotoFlex^®.

For testing ORP electrodes. 427mV, pH7.
Supplied in pack of 250ml.

Professional digital multiparameter meters for mobile measurement, with 3, 2 or 1 universal measurement channels, wireless preparation, colour graphic display (black/white display for Multi 3510), data logger manually or automatically (timed) and 2 (1 for Multi 3510) waterproof USB interfaces suitable for field use. Easy to clean with a soft brush under water jet.

Multi 3630: The Multi 3630 IDS with three universal measurement channels is suitable for all WTW IDS pH, ORP, dissolved oxygen sensors, conductivity cells and turbidity sensors, whether connected to cable or wireless. Documentation of meter and sensor data. User control over MultiLab^® users. With USB-A and Mini USB-B interface and colour display.
Multi 3620: The Multi 3620 IDS with two universal measurement channels is suitable for all WTW IDS pH, ORP, dissolved oxygen sensors, conductivity cells and turbidity sensors, whether connected to a cable or wireless. Documentation of meter and sensor data. User control over MultiLab^® users. With USB-A and Mini USB-B interface and colour display.
Multi 3510: Sequential multi-parameter measurement. All WTW IDS pH, ORP, dissolved oxygen sensors, conductivity cells and turbidity sensors can be connected to the universal channel, either with cable or wireless module. Data transfer to PC with MultiLab^® Importer. With Mini USB-B interface and black/white display.
Multi 3620 IDS: Single meter in a carrying case with Quick Start Guide, CD-ROM and batteries, driver software for USB, cable, power supply
Multi 3620 IDS SET C: Meter in a carrying case with IDS sensors (digital pH sensor SenTix^® 940, digital conductivity cell TetraCon^® 925), QSC Kit, buffer 4 and 7, conductivity standard, stand, beaker, CD-ROM, batteries, cables, power supply, arming SM Pro
Multi 3620 IDS SET G: Meter in a large carrying case with IDS sensors (digital pH sensor SenTix^® 940-3, optical sensor FDO^® 925-3, digital conductivity cell TetraCon^® 925-3), QSC Kit, stand, beaker buffer 4 and 7, conductivity standard, CD-ROM, batteries, cable, power supply , arming SM Pro