Every turbidity tester costs $ 250+, so how does this sensor is priced $ 15?

This sensor cannot be used as professional equipment due to the low-precision, you can use it in experimental project and laboratory measurements.

Is the dac pcb necessary if i just want to use it in analog mode with my arduino?

Yes, you need to simulate the pattern with A

Does this come with the cable for connecting to arduino?

It comes with a gravity 3-pin female cable, which will be easy to connect to our IO expansion shield, if your arduino is UNO, you still need to use three more male-male jumper wire.

will this work on 3.3V as well?

No, this analog turbidity sensor needs to operate at 5V.

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Gravity: Analog Turbidity Sensor for Arduino / ESP32 / STM32 / Raspberry Pi (ADC Required) | Water Quality Monitor | <500ms Response Time & 0-4000NTU Range

Gravity: Analog Turbidity Sensor for Arduino / ESP32 / STM32 / Raspberry Pi (ADC Required) | Water Quality Monitor | <500ms Response Time & 0-4000NTU Range

Product ID: 49816985

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Details

Brand
DFROBOT
Current Rating
4E+1 Milliamps
Lower Temperature Rating
5 Degrees
Maximum Supply Voltage
5 Volts (DC)
Measurement Accuracy
±5%

⚡Ultra-fast <500ms response

🌊0-4000 NTU turbidity range

🔌Dual Analog & Digital output

Description

🌊 Measure clarity, command control — don’t let murky data hold you back!

PRECISION YOU CAN TRUST - Accurate measurements within ±5% ensure reliable data for environmental and lab applications.
COMPACT PORTABLE DESIGN - Lightweight and easy to deploy anywhere—perfect for fieldwork or research setups.
LIGHTNING FAST WATER CLARITY INSIGHTS - Get real-time turbidity data in under half a second to stay ahead in water quality monitoring.
DUAL SIGNAL OUTPUT FOR ULTIMATE FLEXIBILITY - Choose between analog (0-4.5V) or digital signals to fit any system architecture.
VERSATILE COMPATIBILITY FOR SEAMLESS INTEGRATION - Works effortlessly with Arduino, ESP32, STM32, and Raspberry Pi (ADC required) for your smart projects.

The Gravity Analog Turbidity Sensor by DFROBOT delivers rapid (<500ms) and precise (±5%) turbidity measurements across a broad 0-4000 NTU range. Compatible with popular microcontrollers and single-board computers, it offers dual analog and digital outputs for flexible integration. Its compact, portable design is ideal for environmental monitoring, research, and wastewater analysis, empowering professionals to make data-driven decisions with confidence.

Specifications

Brand	DFROBOT
Maximum Supply Voltage	5 Volts (DC)
Measurement Accuracy	±5%
Output Type	Push Pull, Analog
Response Time	5E+2 Milliseconds
Upper Temperature Rating	9E+1 Degrees Celsius
Manufacturer	DFROBOT
Part Number	SEN0189
Item Weight	0.634 ounces
Package Dimensions	5.47 x 3.98 x 1.73 inches
Item model number	SEN0189
Is Discontinued By Manufacturer	No
Item Package Quantity	2
Display Style	analog
Special Features	Portable
Batteries Included?	No
Batteries Required?	No