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Safer to dose than formaldehyde
Eliminates osmotic shock
4 test tubes holding tray
do not swallow
In case of contact with skin wash with plenty of water
Hanna Instruments Checker Iron Colorimeter AZOO Safer to dose than formaldehydeThe HANNA HI 721 CheckerHC bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits are not very accurate and only give 5 to 10 points resolution while professional instrumentation can cost hundreds of dollars and can be time consuming to calibrate and maintain. The HANNA HI 721 CheckerHC is accurate and affordable with immediate results. The new HI 721 CheckerHC portable handheld colorimeter features a