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Top rated flow sensors
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Best for hobbyists
Adafruit STEMMA Soil Sensor - I2C Capacitive Moisture Sensor
Capacitive soil moisture sensor with I2C interface, easy to use with Arduino and Raspberry Pi. Corrosion-resistant design.
- I2C interface
- corrosion-resistant
- low power
- limited to soil moisture only
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Best for water quality
DFRobot Gravity: Analog TDS Sensor / Meter for Arduino
Analog TDS sensor for measuring total dissolved solids in water. Compatible with Arduino and works well for hydroponics.
- accurate TDS reading
- easy calibration
- wide voltage support
- analog output requires ADC
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Best for precision
Honeywell HAFUHT0010L4AXT Pressure Sensor
High-accuracy digital pressure sensor with I2C output. Suitable for industrial applications requiring reliable measurements.
- high accuracy
- digital output
- compact size
- higher cost
- limited pressure range
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Best for air quality
Sensirion SCD30 CO2 Sensor Module
NDIR CO2 sensor with temperature and humidity sensing. Ideal for HVAC, indoor air quality monitoring, and smart buildings.
- dual-channel CO2 detection
- long-term stability
- low power
- expensive
- large footprint
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Best for flow rate
Seeed Studio Grove - Water Flow Sensor (1/2")
Grove-compatible water flow sensor with 1/2" thread, suitable for measuring flow rate in pipes. Easy to integrate with microcontrollers.
- Grove plug-and-play
- hall effect sensor
- low cost
- requires 5V supply
- not for high pressure