DFRobot Water Quality Sensors and Kits Selection Guide

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.

If you want to learn more about DFRobot Water Quality Sensors, please click here.

Selection Guide for Gravity Liquid Sensor Series

Product Name

Gravity: Analog pH Sensor / Meter Kit for Arduino

Gravity: Analog pH Sensor/Meter Kit V2 (Arduino & Raspberry Pi & micro:bit Compatible)

Gravity: Analog pH Sensor / Meter Pro Kit for Arduino

Gravity: Analog Industrial pH Sensor / Meter Pro Kit V2

Gravity: Analog Spear Tip pH Sensor / Meter Kit

Figure

SKU

SEN0161

SEN0161-V2

SEN0169

SEN0169-V2

SEN0249

Measurement Object

pH

Measurement Range

0~14

0~10

Measurement Accuracy

± 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

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.

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Selection Guide for Gravity Liquid Sensor Series

Product Name

Gravity: Analog ORP Sensor Meter for Arduino

Gravity: Analog TDS Sensor/ Meter for Arduino

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

Figure

SKU

SEN0165

SEN0244

DFR0300

DFR0300-H

SEN0237-A

Measurement Object

ORP

TDS

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℃)

±10% F.S.(25℃)

Supply Voltage

5.0V

3.3~5.5V

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

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

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Selection Guide for Gravity Liquid Sensor Series

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 Liquid Level Sensor for Arduino

Figure

SKU

SEN0189

SEN0257

KIT0139

SEN0204

Measurement Object

Turbidity

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

12-36V

5~24V

Arduino Compatible

√

Raspberry Pi Compatible (with external ADC)

×

micro:bit Compatible (with micro:mate)

×

Probe Level

laboratorial

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.

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Gravity Liquid Sensor Selection Guide