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These don't look like the ones from the hydro store because they are double-junction
Where top efficiency and quiet operation is required
24 Hour Timer (on/off with inverse function)
9cm L x 15
TDS readings are performed by an amperometric graphite electrode that resists oxidation
Hanna Replacement Probe for Grochek HI9813-5N & HI9811-5N spl_bfg These don't look like theThis pH EC TDS temperature probe probe features a fiber junction and gel electrolyte making it ideal for fertilizer solutions. It is a replacement electrode for the GroChek series " 5" models: HI9813 5 & HI9813 5N, and is designed for simplicity of use in taking pH, mS cm, ppm and temperature in the C scale measurements. The meter the probe supports is a versatile, water resistant, multiparameter portable instrument specifically designed for
US$ 39.90
US$ 79.90
US$ 33.90
