DFRobot's liquid sensors are devices that can measure various properties of liquids, such as water level, pH, ORP, EC and turbidity.
They can be used with Arduino or other microcontrollers for various applications, such as water quality monitoring, hydroponics, aquariums and smart home.
| Selection Guide for Gravity Liquid Sensor Series | |||||
| Product Image |
|
|
|
|
|
| Product Name | Gravity: Analog pH Sensor / Meter Kit For Arduino | Gravity: Analog pH Sensor/Meter Kit V2 | Gravity: Analog pH Sensor / Meter Pro Kit For Arduino | Gravity: Analog Spear Tip pH Sensor / Meter Kit | |
| SKU | SEN0161 | SEN0161-V2 | SEN0169 | SEN0169-V2 | SEN0249 |
| Measurement Object | pH | pH | pH | pH | pH |
| Measurement Range | 0~14 | 0~14 | 0~14 | 0~14 | 0~10 |
| Measurement Accuracy | ± 0.1pH (25 ℃) | ± 0.1pH (25 ℃) | ± 0.1pH (25 ℃) | ± 0.1pH (25 ℃) | ± 0.1pH (25 ℃) |
| Supply Voltage | 5.0V | 3.3~5.5V | 5.0V | 3.3~5.5V | 5.0V |
| Arduino Compatible | √ | √ | √ | √ | √ |
|
Raspberry Pi Compatible
(with external ADC)
|
× | √ | × | √ | × |
|
micro:bit Compatible
(with micro:mate)
|
× | √ | × | √ | × |
| Probe Level | laboratorial | laboratorial | Industrial | Industrial | laboratorial |
| Features | First open source pH sensor, easy to use, cost-effective, suitable for conventional needs |
Wide
voltage input,
automatic calibration with standard buffer solution,
Compatible with multiple platforms,
Two standard buffer solutions included, ready to use
|
Industrial
probe,
long-term immersion in liquid for online measurement, stable and durable
|
Industrial
probe,
long-term immersion in liquid for online measurement, stable and
durable,
wide voltage input, automatic calibration with standard buffer solution,
compatible with multiple platforms
|
The probe is attached with a spear like protection shield made of stainless steel with a sharp tip. It can be directly stabbed into the soft semisolid material to measure the pH value, such as wet soil or foods. |
| Selection Guide for Gravity Liquid Sensor Series | |||||
| Product Image |
|
|
|
|
|
| Product Name | Gravity: Analog Electrical Conductivity Sensor /Meter V2 (K=1) | Gravity: Analog Electrical Conductivity Sensor / Meter(K=10) | Gravity: Analog Dissolved Oxygen Sensor / Meter Kit For Arduino | ||
| SKU | SEN0165 | SEN0244 | DFR0300 | DFR0300-H | SEN0237-A |
| Measurement Object | ORP | TDS | Electrical Conductivity | Electrical Conductivity | Dissolved Oxygen |
| Measurement Range | -2000mV~2000mV | 0~1000ppm | 0~20ms/cm | 10~100ms/cm | 0~20mg/L |
| Measurement Accuracy | ±10mV(25℃) | ±10% F.S.(25℃) | ±5% F.S.(25℃) | ±5% F.S.(25℃) | ±10% F.S.(25℃) |
| Supply Voltage | 5.0V | 3.3~5.5V | 3.0~5.0V | 3.0~5.0V | 3.3~5.5V |
| Arduino Compatible | √ | √ | √ | √ | √ |
|
Raspberry Pi Compatible
(with external ADC)
|
× | √ | √ | √ | √ |
|
micro:bit Compatible
(with micro:mate)
|
× | √ | √ | √ | √ |
| Probe Level | laboratorial | laboratorial | laboratorial | laboratorial | laboratorial |
| Features | First open source ORP sensor, easy to use, cost-effective, suitable for conventional needs |
Wide
voltage input,
Compatible with multiple platforms,
Easy-to-use, highly cost effective
|
Medium
range, suitable for conventional
needs(e.g. tap water),
Wide voltage input,
automatic calibration with standard buffer solution,
automatic temperature compensation,
Compatible with multiple platforms,
Two standard buffer solutions included, ready to use
|
Large
range, suitable for special needs(e.g.
sea water),
Wide voltage input,
automatic calibration with standard buffer solution,
automatic temperature compensation,
Compatible with multiple platforms,
Standard buffer solutions included, ready to use
|
Galvanic
probe, no polarization time.
Filling solution and membrane cap is replaceable.
Wide voltage input
|
| Selection Guide for Gravity Liquid Sensor Series | ||||
| Product Image |
|
|
|
|
| Product Name | Gravity: Analog Turbidity Sensor For Arduino | Gravity: Analog Water Pressure Sensor | Gravity: Industrial Stainless Steel Submersible Pressure Level Sensor(0~5m) | Gravity: Non-contact Digital Water / Liquid Level Sensor For Arduino |
| SKU | SEN0189 | SEN0257 | KIT0139 | SEN0204 |
| Measurement Object | Turbidity | Liquid Pressure | Liquid Pressure | Liquid Level |
| Measurement Range | 0~3000NTU | 0~1.6 Mpa | 0~5M(depth) | / |
| Measurement Accuracy | ±10% F.S. | ±1% F.S. | 0.50% | / |
| Supply Voltage | 5.0V | 5.0V | 12-36V | 5~24V |
| Arduino Compatible | √ | √ | √ | √ |
|
Raspberry Pi Compatible
(with external ADC)
|
× | × | × | × |
|
micro:bit Compatible
(with micro:mate)
|
× | × | × | × |
| Probe Level | laboratorial | Industrial | Industrial | Industrial |
| Features |
Low-cost
open source turbidity sensor,
plug and play
|
All-metal
shell, available in G1/2 & G1/4 calibers,
Long-term online measurement after connecting to the pipeline
|
The
shell of the transmitter is made of stainless steel, anti-corrosion and easy
to clean. It can be directly placed in the liquid like water, oil or even
mash with large viscosity.
Current to Voltage Converter is included.
|
Non-contact
measurement, suitable for the outer wall of non-metallic container without
direct contact with liquid.
Strong compatibility, penetrate various non-metallic containers.
|
If you want to learn more about DFRobot Water Quality Sensors, please click here.
