Hanna Continuous Reading Meters

Hanna have produced a range of Continuous Reading Meters that will be very usefull for Koi and Aquarium keepers.  Onc these meters are instilled you can keep an eye on your water readings have any changes continously monitored.  Hanna pH/TDS/Temperature Monitor - HI 981504 displays all three readings at once, showing you the pH, TDS & Temperature readings.  This is one of my favourites. For a meter with a greater range use the Hanna Conductivity/TDS/pH/Temp Monitor HI 991405.  It measures TDS, pH, EC and Temperature readings.  For realtime ORP measurements use the Hanna ORP (Redox) with Alarm Signal HI-982401.  This meter comes with an alarm that alerts the user when a set redox or ORP level has been exceeded.  For pH monitors use the Hanna pH Gro'Chek® pH and Temp Monitor - HI-991401  or the Hanna Pronto pH Monitor - HI 981402.  These meters are ideal for tesing the single unit.