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LM35 Temperature Sensor Original

SKU: E2M4H0J4LP
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4.1 (122 reviews)
The Original LM35 Temperature Sensor is a precision analog temperature sensor designed to provide accurate temperature measurements with an output voltage that is linearly proportional to temperature in degrees Celsius. Unlike thermistors, the LM35 is factory calibrated in Celsius and does not require external calibration or trimming, making it simple to interface with microcontrollers and analog measurement circuits. It delivers...
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The Original LM35 Temperature Sensor is a precision analog temperature sensor designed to provide accurate temperature measurements with an output voltage that is linearly proportional to temperature in degrees Celsius. Unlike thermistors, the LM35 is factory calibrated in Celsius and does not require external calibration or trimming, making it simple to interface with microcontrollers and analog measurement circuits. It delivers an output of 10mV per °C, enabling easy temperature calculation using an ADC.

Operating from a 4V to 30V DC supply, the LM35 offers a wide temperature measurement range of -55°C to +150°C with very low self-heating due to its extremely low current consumption. The sensor is commonly available in a TO-92 package and is compatible with Arduino, ESP32, STM32, Raspberry Pi (using an external ADC where required), PIC, AVR, and other embedded development platforms. It is widely used in weather stations, HVAC systems, industrial automation, battery monitoring, temperature-controlled equipment, and educational electronics projects.

Key Features

  • Original LM35 precision analog temperature sensor
  • Factory calibrated directly in degrees Celsius
  • Linear output of 10mV/°C
  • No external calibration required
  • Wide temperature measurement range
  • High accuracy and excellent linearity
  • Low self-heating
  • Low power consumption
  • Low output impedance
  • Wide operating voltage range
  • Simple 3-pin interface
  • Available in compact TO-92 package
  • Compatible with Arduino, ESP32, STM32, Raspberry Pi, AVR, and PIC
  • Ideal for industrial, commercial, and educational applications

Shipping & Returns

Orders placed before 3 PM IST will be shipped on the same day (excluding Sundays and Public holidays) through our shipping partners. In rare cases, the pickup may get delayed during Public holidays / Bandh / Environmental disturbances.

Specifications

Specifications:

Sensor Type: Precision Analog Temperature Sensor
Model: LM35 (Original)
Output Type: Analog Voltage
Output Scale Factor: 10mV/°C
Operating Voltage: 4V to 30V DC
Supply Current: Less than 60µA (Typical)
Temperature Measurement Range: -55°C to +150°C
Accuracy: ±0.5°C (Typical at 25°C)
Typical Non-Linearity: ±0.25°C
Self-Heating: Approximately 0.08°C in Still Air
Output Impedance: Approximately 0.1Ω (for 1mA Load)
Response Time: Fast Response
Package Type: TO-92 (Most Common)
Operating Temperature: -55°C to +150°C
Storage Temperature: -65°C to +150°C
Mounting Type: Through-Hole
Compatibility: Arduino UNO, Nano, Mega, ESP32, STM32, Raspberry Pi (with ADC where required), PIC, AVR, 8051 and other microcontrollers

Additional Resources

LM-35.PDF

FAQ

1. What is the LM35 Temperature Sensor used for?

The LM35 is used to measure ambient or object temperature in applications such as weather stations, HVAC systems, industrial automation, battery monitoring, home automation, and embedded electronics projects.

2. Does the LM35 provide analog or digital output?

The LM35 provides an analog voltage output that is directly proportional to temperature, with a scale factor of 10mV per °C. For example, an output of 250mV corresponds to 25°C.

3. Can the LM35 be connected directly to an Arduino or ESP32?

Yes. The LM35 can be connected directly to the analog input of an Arduino. It can also be used with an ESP32 or STM32, which read the analog output using their built-in ADCs. Raspberry Pi users require an external ADC since standard Raspberry Pi boards do not have analog input pins.

4. What is the operating voltage of the LM35?

The LM35 operates from a 4V to 30V DC power supply while consuming less than 60µA of current, making it suitable for battery-powered and low-power applications.

5. What makes the LM35 different from a thermistor?

Unlike a thermistor, the LM35 is factory calibrated in degrees Celsius, provides a linear analog output (10mV/°C), requires no external calibration, and offers better accuracy with simpler signal processing.