Leaf Sensor Rev4 - Digital Meter - Calibration Combo pak II for leaf sensor voltage readings - no external battery required. Special cable connects directly to a leaf sensor - includes Leaf Sensor Rev4, CD, Digital Meter, Calibration std card and cable

BEYOND All Natural Plant Amendment™ 16 oz (454ml) Concentrate. Indoor/Outdoor. Overrides environmental stress & mineral deficiencies. Proven by NASA & USDA Forest Service meets(NOP std) Natural source of nitrogen. Makes over 450 gal. As seen on Amazon

Leaf Sensor Rev4 and Digital Meter pak for leaf sensor voltage readings - no external battery required. Special cable connects directly to a leaf sensor. Ready use. Includes Leaf Sensor, Digital Meter and cable & CD-ROM

Digital Leaf Sensor Meter for leaf sensor voltage readings - no external battery required. Special cable connects directly to a leaf sensor. Ready use. Take leaf sensor readings - connector/cable included.

Arduino MKR 1000 Leaf Sensor WiFi DataLogger - transmission of up to 3 ea to Google Device Drive Spreadsheets. Ready use with AgriHouse's patented Leaf Sensor. Open source code for Arduino MKR 1000 included.