The higher ppm value is,the more substances in the water. Widely apply to test water quality,for RO system, aquariums, hydroponics, pools, spas,etc. ON/OFF: on and off. (Tester will automatically shut off to save battery power without pressing any key within 10 mins.).
eBay
1 x Digital Soil Tester (battery not included). Sunlight: 9 level (LOW-, LOW, LOW+, NOR-, NOR, NOR+, HGH-, HGH, HGH+). Working humidity: 5% - 95% RH non-condensing. Storage condition: -20°C-50°C, ≤85%(humidity).
eBay
Step 1: Clean the surface soil layer’s all organic impurities which may affect the test results, such as the leaf or the root. Step 3: Insert the probe tip in the testing soil, the probe tip should LEVEL with root.
eBay
4 in 1 Function - This is a 4-in-1 multifunctional soil tester. For outdoor & indoor plants, gardens & grass lawn. Easy to operate, lightweight and portable to carry. 8"(200mm) long probe to reach root-deep into the soil being tested.
eBay
Step 1: Clean the surface soil layer's all organic impurities which may affect the test results, such as the leaf or the root. Step 3: Insert the probe tip in the testing soil, the probe tip should LEVEL with root.
eBay
3-in-1 Soil PH Tester Water Moisture Light Test Meter Flower Plant Garden Kit
eBay
PH Characteristics Resolution: 0.01PH. Error: 0.05PH. Probe type: sensitive low impedance glass bulb.
eBay
Widely Applicable - Small enough to put in a pocket and can be used for drinking water, pools, aquariums, hydroponics and more! Resolution - 0.01pH. LCD Screen - Large display making it easier to read.
eBay