Lightly used meter. Checked and everything works. Don't use any more. See my other auctions for more Hydro stuff.
24-7 Nutrient Monitor The 24–7 Nutrient Monitor is a great all around meter for nutrient applications needing constant monitoring. It measures PPM, pH and Temperature and with its large illuminated display it is easy to read from a distance. Calibration screws are conveniently located on the front for easy access. The new 24-7 Nutrient Meter is priced with the lowest MSRP of any constant read meter currently on the market. This low price will allow more first time growers to afford the quality and no hassle features of a constant read meter. All 24-7 meters sold include 4-ounce bottles of buffer solutions for calibration.

• Click here to download the User Manual