WTW SenTix Ag Silver Electrode for Argentometry, Liquid Electrolyte, S7 Plug-in Head, 103664
€293.00
% Manufacturer's RRP: €325.00 9% below manufacturer's RRP
- Combined silver electrode for argentometry
- Silver measuring element in the form of a cylindrical cap, ceramic diaphragm
- Electrolyte: 2 mol/l KNO3 + 0.001 mol/l KCl, refillable
- Glass shaft, 120 mm long, 12 mm in diameter
- Temperature range -5 to 100 °C
- S7 plug-in head, connection cable selectable separately
Product information "WTW SenTix Ag Silver Electrode for Argentometry, Liquid Electrolyte, S7 Plug-in Head, 103664"
The WTW SenTix Ag is a combined silver electrode for argentometry. The measuring element consists of a silver cylindrical cap fitted to a glass shaft; the electrolyte is a solution of 2 mol/l KNO3 and 0.001 mol/l KCl and can be topped up. The electrode has no temperature sensor and is supplied without a connecting cable.
Silver measuring element and KNO3 electrolyte
A ceramic diaphragm is situated between the electrolyte and the sample. The shaft is 120 mm long and has a diameter of 12 mm. The electrode is approved for use at temperatures between -5 and 100 °C. It has a refill port, which must remain open during measurement. The electrolyte level should be at least 2 cm above the level of the sample.
Topping up the electrolyte
The Ag electrode requires its own electrolyte, ELY/ORP/AG (250 ml, item no. 109735). It is added to the shaft through the refill opening using a suitable pipette. The KCl electrolyte used for pH and ORP electrodes is not suitable here; the bottles are therefore not interchangeable.
S7 connector and cable selection
The connector is type S7; the connection cable must be ordered separately: S7/DIN 1 m (item no. 108110), S7/DIN 3 m (item no. 108112) or S7/BNC 1 m (item no. 108114). If you have a device with a BNC input, use the BNC version; if it has a DIN input, use one of the two DIN cables. These same cables are compatible with pH electrodes featuring an S7 connector, such as the SenTix 60.
Storage and cleaning
During short breaks between measurements, immerse the measuring chain in the reference electrolyte with the refill opening left open. Overnight and for longer periods, store it clean in the irrigation cap filled with electrolyte, with the refill opening closed. Between two measurements, rinse the measuring chain with the next solution or with deionised water. Salt deposits on the cap do not affect the measurement and can be rinsed off with deionised water. For cleaning, use water containing washing-up liquid for grease and oil, 10 per cent citric acid for limescale and hydroxide deposits, and the pepsin cleaning solution PEP/pH (item no. 109648) for proteins. Like any redox measuring chain, the Ag is a consumable item that ages more quickly when exposed to strong acids and alkalis, organic solvents, bromides, sulphides, iodides and high temperatures.
Typical applications
- Argentometry in the laboratory
The SenTix ORP counter electrode with a platinum measuring element is available for redox measurement.
The RH 28 buffer solution (item no. 109740) is available for checking redox measuring chains, whilst the STH 650 bench stand (item no. 109809) holds the electrode in place at the workstation.
Technical details
| Type | Silver redox electrode for argentometry, liquid electrolyte |
| Measuring element | Silver, cylindrical cap |
| Shaft material | Glass |
| Diaphragm | Ceramic |
| Electrolyte | 2 mol/l KNO3 + 0.001 mol/l KCl, refillable |
| Temperature sensor | None |
| Temperature range | -5…100 °C |
| Shaft length / shaft diameter | 120 mm / 12 mm |
| Connection | S7 plug-in connector, without connection cable |
Scope of delivery
- 1 WTW SenTix Ag silver electrode with water cap
The scope of delivery does not include connection cables.
Individual requirements and procurement service
Cables, electrolyte and buffer solution can be ordered together with the electrode. If you are unsure whether the Ag or ORP electrode is suitable for your measurement task, please enquire via lt-laborhandel.com/service.