pH, Turbidity & Water Flow Sensors

Free Delivery on Orders Above Rs 999/- Pan-India

Cash on Delivery Available for Orders above Rs.500/- and Upto Rs 3000/-

SAVE more when you BUY more. Upto 30% Off on BULK PURCHASE

GST Invoices for Your Business

Dedicated Technical Support Team

Safely Delivering Genuine Products PAN INDIA

Support

Buy Water Flow Sensor Online at Best Price in India

Water sensor bricks are made for water detection and can be used to detect leaks in liquids as well as rainfall and water levels. An excellent approach to find a leak, spill, flood, rain, etc. It is to connect a water sensor to an Arduino.

A copper body, a water rotor, and a hall-effect sensor make up a water flow sensor. In the sensor, the rotor rolls as water pass through it at varying rates, changing speed as a result. And the appropriate pulse signal is the output by the hall-effect sensor. Buy water flow sensors at the best price. Because of the best offers on our website always get sensors at a discount price no matter if it is a water level meter price or a water pressure sensor price.

Water Flow Sensor Prices in India

Sr. No	Product	Price
1.	Horizontal Water Float Level Sensor Switch	Rs. 187
2.	Float Switch Sensor For Water Level Controller With 2 Meter Wire	Rs. 242
3.	Analog pH Sensor Electrode with Amplifier Circuit	Rs.1773
4.	Magnetic Float Sensor FS37A (Vertical)	Rs.127
5.	High Sensitivity Water Sensor compatible with Arduino	Rs.35
6.	Solenoid Valve 12v-24v (Blue)	Rs.247
7.	YF-S401 1/8 inch Water Flow Sensor	Rs.273
8.	Water Flow Sensor	Rs.221
9.	Magnetic Float Sensor FSH01 (Horizontal)	Rs.168
10.	Turbidity Sensor	Rs.840
11.	Water Flow Sensor YF - SN402	Rs.310
12.	Water Flow Sensor SEN-HZ21WA	Rs.460
13.	Water Flow Sensor SEN-HZ43WB	Rs.560
14.	Water Flow Sensor SEN-HZ21WI	Rs.465
15.	DC 12V KK-P25/20 8KG Lifting Solenoid Electromagnet	Rs.244
16.	Water Flow Sensor YF G1	Rs.1056
17.	Water Flow Sensor SEN-HZG1WA	Rs.884
18.	Water Flow Sensor YF - DN50	Rs.2570
19.	Mini Water Flow Sensor (White)	Rs.536
20.	Water Flow Sensor YF - DN40	Rs.1274
21.	Water Flow Sensor SEN-HZ41WC	Rs.334
22.	Turbidity Liquid Particle Detection Sensor	Rs.728
23.	Water Flow Sensor SEN-HZ43WA	Rs.323
24.	Solenoid Valve 230V	Rs.284
25.	Magnetic Float Sensor	Rs.194
26.	Float Sensor Contact Type CSSP	Rs.193
27.	Float Sensor CSDP (Double Pin)	Rs.194
28.	Float Switch L-12 (White)	Rs.96
29.	Steel Float Switch	Rs.302

Robocraze provides the best quality pH, turbidity, flow, pressure, level and other sensors to help you complete your projects. Our sensors provide precise and accurate data for fluid flow measurement, liquid purity detection, and water quality monitoring. Both experts and hobbyists will find the sensors simple to use.

We focus on fair pricing and great customer care to ensure you receive the most value for money. You will also receive your items exactly when you need them with our quick delivery. Choose Robocraze for excellent sensors to boost your projects now!

Sensor Categories:

Flow sensors

¼ Inch Brass Water Flow Sensor SEN-HZ41WC
Mini Water Flow Sensor (White)
Water Flow Sensor – YF-B6 Flowmeter G3/4 1-30 L/min 5-15 V Brass
½ Inch Water Flow Sensor SEN-HZ21WA
2 Inch Water Flow Sensor YF-DN50
3⁄4 Inch Brass Water Flow Sensor SEN-HZ43WB
½ Inch Water Flow Sensor – YF-S201
¼ Inch Water Flow Sensor YF-S402
1⁄8 Inch Water Flow Sensor YF-S401
1.5 Inch Water Flow Sensor YF-DN40
½ Inch Brass Water Flow Sensor SEN-HZ21WI

Level sensors

Magnetic Float Sensor FS37A (Vertical)
Float Sensor Contact Type CSSP
Float Switch Sensor for Water Level Controller with 2 Meter Wire
DFRobot Gravity Industrial Stainless Steel Submersible Pressure Water Level Sensor 0-5 m

Turbidity sensors

Turbidity Sensor Module Kit for Arduino
Turbidity Liquid Particle Detection Sensor

pH sensors

Analog pH Sensor Electrode with Amplifier Circuit (listed under “Water Flow Sensor Prices” but described as pH)

Wiring Diagrams

PH Sensor diagram

Turbidity Sensor

Magnetic Sensor

Applications of Sensors

1. Water Quality Monitoring

These sensors play a critical role in maintaining clean and safe water in industrial, residential, and environmental settings.

Monitoring drinking water quality in treatment plants
Real-time river, lake, and groundwater analysis
Detecting contamination using pH, turbidity & chemical imbalance
Tracking flow rates in pipelines for leak detection
Industrial effluent and wastewater discharge monitoring
Remote environmental sensing using Raspberry Pi/Arduino-based IoT stations
Aquaculture water quality maintenance for fisheries

2. Smart Aquariums & Aquaculture

Automated aquariums rely heavily on water sensing technology for stable aquatic life.

Automatic pH regulation for saltwater & freshwater tanks
Monitoring water clarity using turbidity sensors
Auto-refill systems using level sensors
Over-flow protection in aquarium filters
Real-time temperature, pH, and water-flow monitoring
Automated dosing systems for nutrients & chemicals
Preventing pump dry-run conditions with flow and level detection

3. IoT & Smart Automation Projects

These sensors are ideal components in modern Internet of Things (IoT) projects.

Smart water management systems for homes & farms
Remote water tank level monitoring via mobile apps
Intelligent water flow billing systems
Cloud-connected water quality monitoring dashboards
Predictive maintenance for pumps and water motors
Smart irrigation systems using pH & flow data
Industrial automation integrating pressure, flow & level sensors
Microcontroller-based STEM/DIY projects for students

Installation & Calibration Instructions

1. Flow Sensors

Installation

Fit the sensor directly in-line with the water pipe.
Ensure the arrow on the body matches the water flow direction.
Install horizontally for best accuracy.
Keep the sensor free from debris or sediment.

Calibration

Pass a known volume of water (like 1 litre) through the pipe.
Use any display or meter (or your controller’s interface) to note the pulse count or reading.
Compare the reading to the actual water volume.
Adjust the calibration factor in your device settings or controller menu.

2. pH Sensors

Installation

Connect the pH probe to its signal/amplifier module.
Keep the probe vertically in the water.
Rinse with distilled water before and after use.
Never wipe the glass bulb – only rinse gently.

Calibration

Use standard buffer solutions: pH 7, pH 4, and optionally pH 10.
Place the probe in pH 7 → adjust the device’s calibration setting to match 7.00.
Rinse and place in pH 4 → adjust slope/secondary calibration.
Allow 30–60 seconds for readings to stabilize each time.

3. Turbidity Sensors

Installation

Submerge the sensor completely in water for accurate light detection.
Make sure no bubbles form around the sensor window.
Keep the sensor clean and free from algae buildup.

Calibration

First measure clear water to set your baseline.
Then use water with known turbidity (e.g., diluted milk or turbidity standard).
Adjust your display/device to match reference turbidity levels (NTU).
Create 2–3 calibration points (low, medium, high turbidity).

4. Level Sensors

Installation

Float-Type Sensors:

Mount vertically inside a tank.
Ensure the float can move smoothly with the water level.

Submersible Pressure-Level Sensors:

Lower the probe to the bottom of the tank.
Ensure the cable remains vented and not blocked.

Calibration

Float switches: No calibration needed.
Submersible level sensors:
Set zero level with the tank empty.
Fill the tank stepwise (25%, 50%, 75%, 100%).
At each level, adjust your monitoring device to correspond to actual water depth.

5. Pressure Sensors

Installation

Install on a pipe or tank using the correct thread (G1/4, NPT, etc.).
Use Teflon tape for leak-free installation.
Keep the sensor away from excessive vibration.

Calibration

Set the sensor reading to zero when no pressure is applied.
Apply a known pressure value using a manual pump or gauge.
Adjust your device’s display to match the known pressure.
Repeat with one or two additional pressure values for accuracy.

Troubleshooting Tips & Maintenance Advice

Flow Sensors

Troubleshooting

Inaccurate readings: Check for air bubbles, debris, or incorrect pipe orientation.
No output: Ensure water is actually flowing and connections are secure.
Fluctuating values: Install the sensor horizontally and avoid turbulence.

Maintenance

Clean the turbine area regularly to prevent clogging.
Use a filter in dirty water environments.
Inspect the sensor for mineral deposits and remove them carefully.

pH Sensors

Troubleshooting

Unstable pH values: Ensure the probe is fully submerged and not dry.
Slow response: Clean the probe and recalibrate.
Incorrect readings: Check buffer solution freshness before calibration.

Maintenance

Always store the probe in pH storage solution (never dry).
Clean the probe with distilled water after each use.
Perform 2-point calibration regularly for accurate measurements.

Turbidity Sensors

Troubleshooting

Sudden spikes: Check for bubbles or sensor misalignment.
Low sensitivity: Ensure the lens is clean and unobstructed.
Zero readings: Verify the sensor is fully submerged.

Maintenance

Clean the optical window weekly to avoid algae or sediment buildup.
Keep the sensor in stable, bubble-free water for consistent readings.
Avoid scratching the sensor lens.

Level Sensors

Troubleshooting

Float Sensors:

No switching: Ensure the float can move freely—no obstructions.
False triggers: Confirm proper mounting orientation.

Submersible Level Sensors:

Drifting values: Inspect the vent tube for moisture blockage.
Incorrect depth readings: Recalibrate with known water levels.

Maintenance

Clean float mechanisms to prevent sticking.
Check cable seals and sensor housing for leaks.
Periodically verify accuracy with known tank levels.

Pressure Sensors

Troubleshooting

No pressure detected: Check for leaks or loose fittings.
Erratic values: Reduce vibration or add dampening.
Incorrect output: Verify supply voltage and zero calibration.

Maintenance

Inspect threads and seals regularly to prevent leaks.
Keep sensor dry and protected from corrosion.
Recalibrate periodically, especially after long shutdowns.

Popular Searches

1. How to use a water sensor Arduino?

S, Vout(+), and GND are the three terminals of a water sensor (-). Here is the process of How to use a water sensor, Arduino
Connect your Arduino board's +Vs to +5v.
S should be connected to the Arduino board's digital PIN 8.
Connect the Arduino's GND to GND.
Connect the LED to the Arduino board's digital PIN 9.
Pin 8 on the Arduino gets LOW when a water sensor detects it, and the LED on the Arduino is then turned ON.

2. What is a water flow sensor?

Large industrial facilities, and business and residential structures need a lot of water supplies. To fulfill this requirement, the public water supply system is utilized. It is necessary to measure the rate of flow of water to keep track of how much is provided and used. For this, these sensors are employed.

3. Can an IR sensor detect water?

No, IR sensors are not very commonly used to detect water. Because the beam that infrared sensors emit must be broken by a non-transparent edge, which water does not have, infrared sensors are not frequently employed to detect surface water.

4. Are these sensors compatible with Arduino and Raspberry Pi?

Yes — the turbidity sensor module and pH sensor are explicitly designed for compatibility with microcontroller platforms like Arduino and single-board computers such as Raspberry Pi. For example, the turbidity sensor listing mentions compatibility with Arduino, Raspberry Pi, AVR and PIC platforms.

5. Can these sensors measure water quality for DIY projects?

Yes — they are designed for water quality monitoring, including applications like detecting suspended particles (turbidity) and measuring pH levels of liquids. For example, the turbidity sensor measures how much light is transmitted or scattered by particles in water, which relates to water clarity and particle load.

6. What is the accuracy and range of these sensors?

The turbidity sensor has a measuring range listed as 0 to about 1000NTU (Nephelometric Turbidity Units) in the product specification. The accuracy is described as suitable for monitoring purposes rather than ultra-precise laboratory standard measurements — it’s designed more for hobbyist and field/demo use than certified analytic use. The water flow sensor (also in that category) lists a flow characteristic and tolerance like ±10% for one model.

7. Do these modules require calibration and maintenance?

Yes — calibration or adjustment is recommended. For example, the turbidity sensor includes a potentiometer (trim-pot) for sensitivity adjustment. For best results, you’d calibrate the sensor in clean water or known standard solution, establish a baseline, and check periodically for drift or sensor fouling (especially in water monitoring where particles or coatings may accumulate).

All Categories

pH, Turbidity & Water Flow Sensors

Categories

Refined By Clear all

Availability

Price

Featured Products

Sort by:

All About pH/Turbidity/Flow sensors

Buy Water Flow Sensor Online at Best Price in India

Water Flow Sensor Prices in India

Sensor Categories:

Flow sensors

Level sensors

Turbidity sensors

pH sensors

Wiring Diagrams

PH Sensor diagram

Turbidity Sensor

Magnetic Sensor

Applications of Sensors

1. Water Quality Monitoring

2. Smart Aquariums & Aquaculture

3. IoT & Smart Automation Projects

Installation & Calibration Instructions

1. Flow Sensors

2. pH Sensors

3. Turbidity Sensors

4. Level Sensors

5. Pressure Sensors

Troubleshooting Tips & Maintenance Advice

Flow Sensors

pH Sensors

Turbidity Sensors

Level Sensors

Pressure Sensors

Frequently Asked Questions

1. How to use a water sensor Arduino?

S, Vout(+), and GND are the three terminals of a water sensor (-). Here is the process of How to use a water sensor, Arduino

Connect your Arduino board's +Vs to +5v.

S should be connected to the Arduino board's digital PIN 8.

Connect the Arduino's GND to GND.

Connect the LED to the Arduino board's digital PIN 9.

Pin 8 on the Arduino gets LOW when a water sensor detects it, and the LED on the Arduino is then turned ON.

2. What is a water flow sensor?

3. Can an IR sensor detect water?

No, IR sensors are not very commonly used to detect water. Because the beam that infrared sensors emit must be broken by a non-transparent edge, which water does not have, infrared sensors are not frequently employed to detect surface water.

4. Are these sensors compatible with Arduino and Raspberry Pi?

5. Can these sensors measure water quality for DIY projects?

6. What is the accuracy and range of these sensors?

7. Do these modules require calibration and maintenance?

Sign up for our newsletter

Shop the look

Choose Options

Edit Option

Back In Stock Notification

Compare

Choose Options

Let customers speak for us