sensors 382 in stock
Sensors at Circuitrocks — Measure the World with Arduino, ESP32 & Raspberry Pi
Build reliable projects with our curated sensors—from distance and motion to environmental, chemical/water quality, current/voltage, and flow/level. Classroom-friendly, lab-tested, and maker-ready.
Distance • Motion/IMU • Temp/Humidity • Air Quality • Chemical • Flow/Level • Current/Voltage
Why shop sensors here
- Wide coverage: hobby to lab-grade probes
- Easy integration: I²C/SPI/UART/analog with libraries
- PH support: quick local advice and replacements
Popular builds
- Line-following & obstacle-avoid robots
- Weather stations & IAQ dashboards
- Hydroponics/aquarium controllers (pH/EC/DO)
- Energy, water-flow, and tank-level monitoring
Recommended add-ons
Featured sensor categories
Distance & Motion
Environmental & Air Quality
- Temp/Humidity/Pressure
- CO₂ (NDIR), VOC/TVOC & PM2.5
- Gas & chemical (MQ series, VOC)
Water, Power & Process
- pH/EC/ORP/DO (incl. Atlas Scientific)
- Pressure & level
- Flow meters
- Current/voltage sensors
Tip: For noisy or long-cable installs, prefer I²C/UART digital sensors or use signal isolation modules for analog probes.
Sensor chooser (quick guide)
| Need | Good first choice | Notes |
|---|---|---|
| Object distance | Ultrasonic HC-SR04 or ToF VL53L0X | ToF is compact and better at short ranges; ultrasonic is budget-friendly. |
| Temp/Humidity/Pressure | BME280 / SHT31 | I²C, stable libraries; great for weather and logging. |
| Air quality | CO₂ (NDIR) + VOC + PM2.5 | Combine for a complete IAQ score; ensure airflow and filters. |
| Water chemistry | Atlas Scientific pH/EC/DO | Use proper storage/calibration solutions; consider temp compensation. |
| Flow & level | Hall-effect flow meter + pressure/ultrasonic level | Mind pipe size (G1/2, 3/4) and minimum flow for accurate readings. |
| Motion/orientation | IMU MPU-6050/LSM6 family | Good for balancing bots, logging, gestures; sample at steady rates. |
| Current/voltage | INA219/INA226 or ACS series | High-side digital measurement; isolate if monitoring mains. |
Values and picks are common starting points; check each product page for exact specs and wiring.
Starter bundles
- Weather Node: BME280 + ESP32 + OLED + enclosure
- Hydro Monitor: pH + EC + RTD temp + isolated PSU
- Robot Kit: ToF + IMU + motor driver + 5V supply
FAQ
Are these sensors compatible with Arduino/ESP32/Raspberry Pi?
Yes. Most expose I²C, SPI, UART, or analog outputs with ready-made libraries and examples.
Do gas and chemical sensors need calibration?
Yes—MQ sensors require burn-in; water probes (pH/EC/DO) need regular calibration and proper storage solutions.
How do I avoid noisy readings?
Use stable power, short signal runs, shielding/grounding, and consider digital sensors or isolation for long cables.
Do you ship nationwide?
Yes—fast shipping anywhere in the Philippines. Same-day processing on in-stock orders before cutoff.
Explore related: Chemical Sensors • Pressure Sensors • Displays • Power & Isolation • Enclosures • Cables
