Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Sensor Model	LM75BD / LM75AD
Interface Type	I2C (Inter-Integrated Circuit)
Operating Voltage	2.7V to 5.5V
Temperature Range	-55°C to +125°C
Accuracy	±2°C (typical)
Resolution	9-bit to 12-bit configurable
Conversion Time	Max 150ms at 12-bit
Package Type	SOIC-8 on Breakout Board
Pin Count	5 Pins (VCC, GND, SDA, SCL, ALERT)
Application	Embedded Systems, HVAC, Industrial Monitoring

6 reviews

Anonymous

Mar 31, 2026

Rating: 5/5

Great for Home Automation

Integrated this with my ESP32 home server. The low power consumption and accurate readings make it ideal for monitoring server room temperatures. Very satisfied.

Anonymous

Mar 29, 2026

Rating: 5/5

Consistent Performance

We ordered ten of these for our student robotics kits. All units worked out of the box with uniform calibration. Excellent value for educational purposes.

Anonymous

Mar 27, 2026

Rating: 4/5

Solid sensor, clear documentation needed

The hardware is excellent, but I had to look up the datasheet online for the register map as the included paper was minimal. Once configured, it reads temperature very quickly.

Anonymous

Mar 26, 2026

Rating: 5/5

Reliable and Compact

Great little sensor board. It fits perfectly into tight spaces in my enclosure. The alert pin feature is very useful for setting over-temperature thresholds without constant polling.

Anonymous

Mar 15, 2026

Rating: 5/5

Perfect for Arduino Projects

This LM75 module works flawlessly with my Arduino Uno. The I2C communication is stable, and the temperature readings are consistent with my calibrated thermometer. Highly recommended for hobbyists.

Anonymous

Mar 11, 2026

Rating: 4/5

Good precision, easy to integrate

Used this for a custom PCB prototype. The high-speed I2C interface performed well up to 400kHz. Only minor issue was the silkscreen labeling being slightly faint, but functionality is top-notch.

5 FAQ

Q: What is the default I2C address for this sensor?

A: The default I2C address is 0x48. You can change the address by connecting the A0, A1, and A2 pins to VCC or GND if your specific chip variant supports address selection pins exposed on the board.

Q: How do I configure the resolution of the temperature reading?

A: Resolution is configured via the Configuration Register. You can set it to 9, 10, 11, or 12 bits. Higher resolution increases accuracy but also increases conversion time.

Q: Is the ALERT pin active high or active low?

A: The ALERT pin behavior is configurable in the configuration register. By default, it is often set to active low, but you can program it to be active high depending on your system requirements.

Q: Can this sensor operate at 3.3V logic levels?

A: Absolutely. The LM75 operates from 2.7V to 5.5V, so it is fully compatible with 3.3V microcontrollers like the ESP32 and Raspberry Pi.

Q: Does this module come with pull-up resistors for the I2C lines?

A: Yes, the breakout board includes 4.7kΩ pull-up resistors on both SDA and SCL lines, making it ready to use without external components.

Explore your interests

STC32G12K128 STC8H8K64U Microcontroller Small System Core Board Development Board Emulator

$16.50

Youxin Electronics_STM32H743IIT6 Core Board System Board Learning Board STM32 Development Board

$118.00

Arduino DUE Development Board 32-bit ARM Controller A000062 Italian Official Original Import with Cable

$299.00

Ultrasonic Sensor HC-SR04 Ultrasonic Distance Measuring Module Bracket US015-025-026-100

$3.16

Serial SHT20 Chip Temperature and Humidity Sensor Test, SHT30 Chip Measurement and Monitoring Module by Viter Intelligence

$11.00

High-Speed Yabo Smart Raspberry Pi 4B Motherboard Development Board Accessories RaspberryPi 2G/4G/8G RAM Py

$494.30

Magnetic Circular Counting Chips, Two-Sided Flip Coins for Elementary Math, Kindergarten Early Education, Ten-Frame Matrix, Addition/Subtraction within 10 & 20, Teaching Tools

$11.90

3-Wire/4-Wire Flame Sensor Module, Fire Source Detection with IR Receiver, Flame Detection and Alarm

$1.08

SANSI White Label Class A Glass Graduated Cylinder C18 Micro-Precision Demulsification Cylinder with Scale Measurement Includes Certificate Ground Joint Stopper Hexagonal Bottom Borosilicate Glass Lab Equipment

$3.68

EV2400 Battery Unlock Fuel Gauge Programmer MSP430 HPA500 Evaluation Module Interface Board SMBus

$323.00

Cube Three-View Teaching Aid with Grid - 3D Geometry Observation Tool for Grades 4-5 Math (2cm Cubic Blocks Set)

$15.10

OrangePi Orange Pi Zero3 Zero 3 Development Board Allwinner H618 Orange Pi

$228.00

Digital 38KHz Infrared Receiver Transmitter Head Sensor Module Electronic Building Blocks Robot Infrared Communication Remote Control

$2.29

12V Stable Version Light-Control Switch No-Light Sensing with Extension Cable Photoresistor Plus Relay Module

$49.20

STM32 Smart Car 51 Microcontroller Arduino Obstacle Avoidance Chassis Kit Mecanum Wheel Robot Car

$40.80

Tech Small Production Small Invention DIY Piano Electronic Keyboard Real Playable Science Small Handmade DIY Materials

$33.00

HX711 Pressure Sensor Module Electronic Scale Bracket Weighing DIY Scale Pan Tray Set 5/10/40kg200

$3.28

Transparent 3D Geometric Model Perspective Decomposition Graphic Teaching Aid, Complete Set for Elementary Grades 1-6 Math

$6.80

Thin Film Pressure Sensor Display, USB Rechargeable Flexible Resistive Pressure Digital Display Module, Wide Range Wireless

$20.00

E18-D80NK Infrared Photoelectric Switch Diffuse Reflection Obstacle Avoidance Sensor Module 3-80CM

$12.60

LAN8720 Module Network Module Ethernet Transceiver RMII Interface Development Board Xinwei Electronics

$7.85

STC15W408AS Core Board Minimum System Board 51 Microcontroller Development Board TTSOP20 Learning Board

$18.47

New Version MEGA2560 R3 Development Board, Improved MEGA2560 R3 with Sensor Expansion Board

$13.68

Gradient Visual Illusion Kit: Electric Rotating Assembly Toy for Maker DIY, Paintable Handmade Model

$8.72

51/AVR Microcontroller Core Development Board STC89C52RC/51MCU Experiment Board/ATMEGA32 Learning Board

$37.90

[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set

$15.00

5A Range Current Transformer Module Voltage Sensor Single-Phase AC Active Output Current Transmitter

$5.06

Foldable Clothes Drying Rack Floor Standing Home Balcony Bedroom Hanging Clothes Quilt Drying Artifact Outdoor Cooling Rod Indoor Drying Rack

$47.10

Metal Detector Module Non-Contact Metal Induction Sensor Detection Module Metal Detector

$8.70

RV1103 Miniature Linux Development Board: RISC-V Vision and AI with Ethernet Port

$53.10

For Arduino Development Board R3 Mainboard Microcontroller Module Kit Programming Learning Board Sensor Suite

$78.00

Xuefen Geometry Stamping and Tracing Set for Grades 1-2, 3D and 2D Ink Pads, Math Learning Tools, Cube and Cuboid Models

$4.51

Rubber Tire Toy 4WD Smart Car Wheels Car Model Robot Accessories (Suitable for 2mm Axle)

$0.50

E18-D80NK Infrared Obstacle Avoidance Sensor Proximity Switch Smart Robot Car 10-80cm

$6.30

Digital 38KHz Infrared Receiver/Transmitter Head Sensor Module for Electronic Building Blocks Robots, Infrared Communication Remote Control

$2.80

51 MCU Minimum System STC89C52 DIP40 Through-Hole Smart Car Main Control Board Learning Experiment

$19.80

Outdoor Adventure Kids' Insect Observation Box with Magnifying Glass, Boys & Girls Toy for Exploration, Butterfly Catching and Fish Scooping Tools

$7.80

MPU-9255 9-Axis Attitude 3-Axis Electronic Compass Accelerometer Gyroscope Magnetic Field Sensor Module

$13.42

Freeze-Dried Chicken Treats for Dogs: Nutritious Weight-Gain Breast Meat Chunks for Puppies – Teeth Cleaning, Grain Mixing, Universal Use

$3.90

Ningbo Keli SQB Cantilever Beam Weighing Module Sensor 100kg 500kg 1t 2t 3 Ton Small Floor Scale Inductor

$48.00