Extech EC400 ExStik Waterproof Conductivity, TDS, Salinity, and Temperature Meter

Très bon produit

die Beschreibung "Maßeinheiten (u. a.): µS/cm, mS/cm, ppm, ppt, mg/L und g/L " ist falschg/L können NICHT ()direkt) gemessen werden nur mg/L, was aber der Faktor 1000 feiner istsomit ist das Gerät für größere Salzgehalte z.B. Meerwasser leider ungeeignet. im Datenblatt ist von max. 999 ppm Salzgehalt die Rede also max. knapp 1 g/Lfür mich leider sinnlos

Comprato usato a metà prezzoArrivato nei tempi ben imballatoil prodotto funziona perfettamente e risponde alle caratteristiche dichiaratela misurazione è abbastanza precisa ed è dotato di un manualetto abbastanza chiaro

Prodotto molto valido e funzionale ad un prezzo accessibile, di semplice utilizzo e tarato perfettamente come da riscontro immediato realizzato

I bought this instrument Extech EC400 Conductivity, TDS, Salinity, and Temperature meter to check the salt levels of our pool. We have a saltwater pool with an in-line chlorinator, and the salt level is important to the operation of the chlorinator. For this application you would normally use the Salinity feature, which will read in ppm (parts per million) NaCl (salt) or ppt (parts per thousand). My pool system recommends 2800-3200 ppm salt levels. The extech will read these levels in ppt, which will be 2.8-3.2 ppt.This instrument is not a toy. When I first got it, I took it to the lab to compare it with instruments and standards we have there. I first tried a 500 ppm NaCl standard and the EC400 read 501, which is excellent. I then compared readings of several different waters with the EC400 and our expensive laboratory instruments, and again, I saw excellent agreement between the EC400 and the other instrument.This instrument does have a lot of features and can be a bit intimidating. The display screen is a bit small for my eyes, but that aside, this is an excellent buy.To keep the probes clean, which will help it to stay calibrated, be sure you rinse it with purified water (distilled water is good). If you get it into really nasty water, or oils, or acids or caustic, that will probably cause the unit to malfunction.I haven't had it a long time, but I am very happy with what I see initially.I also plan to use this probe to check the purified water I buy at the store for drinking or home brewing. My pool water runs about 3.0 ppt Salt, or 3000 ppm Salt. My tap water in the house runs about 300 ppm Salt, and the purified water runs about 10 ppm salt. Ultrapure water I have at the lab runs <1 ppm Salt.You should also understand that real water is a mixture of several different ions which combine to make salts, that can include sodium, magnesium, calcium, chlorides, sulfates, phosphates, and carbonates, to name a few. Most salinity instruments, including this one will read the salt concentration, as though it were all NaCl, and that is the concentration that is reported. This can be misleading, when there is an abundance of other salts in the water you are measuring and the concentration will not accurately measure the true concentration of salt.Better living through Chemistry...