Hantek 3in1 Digital Oscilloscope+Waveform Generator+Multimeter Portable USB 2 Channels 40mhz 70mhz LCD Display Test Meter Tools Ultra-low Power Design With Large-capacity lithium Battery One-key AUTO – 2D72
I bought the model: 2D72
Battery: CR2 x 1
Battery Life: 2 years
Standby current: 13uA
Working current: 65mA
Max current: 100 mA
Wireless Type: 2.4GHz, 1T1R
Protocol: IEEE 802.11b/g/n
Wireless Range: 45m
Operating Temperature: 0℃～ 40℃ (32°F～104°F)
Operating Humidity: 20% ～ 85%
Storage Temperature: 0℃ ～ 60℃ (32°F ～140°F)
Storage Humidity: 0% ～ 90%
Size: Main body: 71mm x 21mm x22 mm
Small body: 40mm x 11mm x 11 mm
DC Current Meter Voltmeter & Ampere Shunt
– Operating voltage:DC 4.5 – 30V
– Measure voltage: DC 0 – 100V
– Minimum resolution(V): 0.1V
– Measure current:50A (require external shunt)
– Minimum resolution(A): 0.1A
– Operating current: <20mA
– Display: three 0.28″ LED digital tube
– Display color: Red and Blue (two-color display)
– Dimensions: 48 x 29 x 21mm
– Mounting cutout: 45.5 x 26.5mm
– Refresh rate: about 500mS / times
– Measure accuracy: 1% (± 1 digit)
– Operating temperature: -10 to 65°c
– Operating Humidity: 10 to 80% (non-condensing)
– Working pressure: 80 to 106 kPa
– Applications:Suitable for automotive/electric cars/motorcycles battery monitoring or other products voltage current measurement
– Black line (thin): vacant or buck circuit (module) negative
– Red line (thin): power supply+
– Black line (thick): COM, common measuring
– Red line (thick): PW+, measuring terminal voltage input positive
– Yellow line (thick): IN+, current input+
Soil Humidity Sensor Hygrometer Measure Module
This is a simple moisture sensor for measuring moisture of the soil, when the soil water, the analog sensor output value will decrease, and vice versa will increase.
Using this sensor make an automatic watering system, when you are not at home or over a long period of time watering, it can sense whether your plant has been thirsty.
Prevent plant wilts know that this is caused by lack of water.
Supply voltage: 3.3V or 5V
Operating current: less than 20mA
Output voltage: 0-2.3V (2.3V is completely immersed in water voltage value),
5V power supply, the greater the humidity, the greater the output voltage.
Sensor type: Analog Output
Sensor surface made of metal processing, can extend its service life.
Insert it into the soil, and then use the AD converter to read it.
See here for buy this sensor.
More info are here.