WTW SenTix 41-3 Plastic PH Electrode with Gel Electrolyte and Temperature Sensor, 3 m Cable, 103636
€276.00
% Manufacturer's RRP: €306.00 9% below manufacturer's RRP
- Built-in NTC temperature sensor (30 kOhm) for automatic temperature compensation
- 3 m fixed cable with a waterproof DIN plug and 4 mm banana plugs
- Gel electrolyte with fibre diaphragm
- Plastic shaft 120 x 12 mm
- Measuring range 0 to 14 pH, temperature range 0 to 80 °C
- For waste water, swimming pool water, groundwater and surface water
Product information "WTW SenTix 41-3 Plastic PH Electrode with Gel Electrolyte and Temperature Sensor, 3 m Cable, 103636"
The WTW SenTix 41-3 measures pH and temperature using a single measuring chain. An NTC sensor with a resistance of 30 kOhm is housed in the shaft; the signal is transmitted together with the pH signal via a 3 m long fixed cable to the measuring instrument. The connector consists of a waterproof DIN plug and a 4 mm banana plug.
Why the integrated sensor matters
The pH value of a solution depends on its temperature, and the slope of the electrode changes accordingly. Instruments with automatic temperature compensation read the temperature directly from the shaft, without the need to suspend a second probe in the vessel. The version without a sensor, but with the same shaft and gel system, is the SenTix 21-3.
Shaft, gel and diaphragm
The plastic shaft, made of PPE/PS, is 120 mm long and 12 mm in diameter. The diaphragm is made of fibre, with a gel serving as the reference system. The pH measurement range is from 0 to 14, the temperature range from 0 to 80 °C, and the membrane resistance is less than 1 GΩ.
Cable and connector
A three-metre fixed cable is sufficient for measuring stations where there is some distance between the sample and the instrument. If a one-metre cable is sufficient and you require BNC connectors, consider the SenTix 42. On the SenTix 41-3, the cable terminates in a DIN plug in accordance with DIN 19262 and a 4 mm banana plug.
Maintenance
Before use, remove the rinsing cap; gas bubbles behind the membrane are removed by shaking. During short measurement breaks, the electrode should be stored in reference electrolyte (3 mol/l KCl, Ag⁺-free); overnight, it should be stored in the filled rinsing cap. Once the cap has dried out, the measuring chain must be conditioned in the reference electrolyte for at least 24 hours. Following cleaning, the electrode must be conditioned for at least one hour and recalibrated. A shorter service life is to be expected when used in fats, oils, protein solutions or strong acids and alkalis.
Typical applications
- Electroplating effluent, industrial effluent and effluent in general
- Aquarium water and swimming pool water
- Groundwater, lake water, surface water and seawater
- Household cleaning products
Technical details
| Type | Plastic pH electrode with gel electrolyte and temperature sensor |
| Sensor shape | Cylinder |
| Shaft material | Plastic (PPE/PS) |
| Shaft length / Shaft diameter | 120 mm / 12 mm |
| Diaphragm | Fibre |
| Reference system | Gel |
| pH measurement range | 0 to 14 pH |
| Temperature range | 0 to 80 °C |
| Membrane resistance | < 1 GΩ |
| Temperature sensor | NTC 30 kOhm, integrated |
| Connection | 3 m fixed cable with waterproof DIN plug and 4 mm banana plug |
| Standards | EU Declaration of Conformity (RoHS Directive 2011/65/EU), WEEE marking |
Scope of delivery
- 1 WTW SenTix 41-3 pH measuring chain with irrigation cap and fixed 3 m cable
Individual requirements and procurement service
Reference electrolyte KCl-250 (order no. 109705), buffer solutions for calibration and the A pHLab/K plastic armour are among the WTW accessories supplied by LT Laborhandel on request. Our procurement service is available to assist with other cable lengths, connector combinations or any queries regarding the pin configuration on the measuring instrument.