0.00 and 1.00 ppm standards (iron) for Hanna Checker HI721: Iron
Great for testing proper functionality of your Hanna Checker HI721 Checker.
High quality tube holder for your dosing pump.
Slots available for three tubes for 8mm slots
Three strong magnets
Clear acrylic design
High quality probe holder that holds up to 3 probes. Holder has two 13mm ports and a larger 15mm port to accommodate the larger Neptune Systems temperature probe.
Slots available for three probes (2 x 13mm, 1 x 15mm)