MAX31855 K-Type Thermocouple Module - SPI Interface, 3.3-5V

Name: MAX31855 K-Type Thermocouple Module - SPI Interface, 3.3-5V
Brand: Generic
SKU: SENS-3731
Price: 579.00 INR
Availability: OutOfStock

₹579.00 (Inclusive of all taxes)

Out of Stock

The MAX31855 K-Type Thermocouple Module is a precision SPI interface breakout board designed for high-temperature measurement from -200°C to +1350°C. It integrates cold-junction compensation and signal conditioning, providing a 14-bit digital output compatible with 3.3V or 5V microcontrollers like Arduino, Raspberry Pi, and ESP32.

Features

High-temperature measurement from -200°C to +1350°C
Integrated cold-junction compensation and 14-bit ADC
SPI digital interface for easy microcontroller connection
Wide 3.3V to 5V power and logic level compatibility
Complete breakout board with terminal block and pin headers

Out of stock

Get Notified When Available

Description

The MAX31855 is a dedicated thermocouple-to-digital converter that simplifies high-temperature sensing. It handles the complex signal amplification and cold-junction compensation required for accurate thermocouple readings, outputting a calibrated digital value via a 3-wire SPI interface. This eliminates the need for external analog conditioning circuits.

The module is a fully assembled breakout board featuring the MAX31855 IC, a 3.3V regulator, bypass capacitors, and level-shifting circuitry. It provides a terminal block for secure K-type thermocouple connection and standard pin headers for integration into breadboards or custom PCBs, making it ideal for industrial monitoring, kiln control, and high-temperature process applications.

Key Features

Designed exclusively for use with K-type thermocouples.
Provides temperature output in precise 0.25°C increments.
Includes an internal temperature sensor for accurate cold-junction compensation.
Operates from a wide 3.3V to 5V DC supply with logic level compliance.
Simple 3-wire SPI digital output requires minimal microcontroller I/O pins.
Compact, fully assembled, and tested breakout board for reliable performance.

Applications

Industrial furnace, kiln, and oven temperature monitoring and control.
High-temperature process monitoring in manufacturing and laboratory settings.
Embedded temperature sensing for 3D printer hotends and heated beds.
Energy system monitoring, including boiler and exhaust gas temperature measurement.
Prototyping and data acquisition systems requiring robust high-temperature sensing.

Technical Specifications

Item Type	Sensor Module
Model Number	MAX31855 K-Type Thermocouple Module
Compatible Thermocouple	K-Type
Supply Voltage	3.3V to 5V DC
Interface	SPI (3-wire)
Measurement Range	-200°C to +1350°C
Resolution	14-bit
Output Increment	0.25°C
Module Dimensions (LxW)	20 mm x 20 mm
Module Weight	1.33 g

Frequently Asked Questions

What is the power supply range for the MAX31855 module?

The module operates from a wide 3.3V to 5V DC power supply. Its onboard regulator and level-shifting circuitry ensure logic-level compatibility with both 3.3V and 5V microcontrollers, making it versatile for use with Arduino, Raspberry Pi, and other development boards.

Can I use a thermocouple type other than K-type with this module?

No. The MAX31855 chip is specifically calibrated for use with K-type thermocouples. It will not provide accurate readings with J, T, E, or other thermocouple types. You must use a standard K-type thermocouple probe.

How do I connect and read data from the module?

The module communicates via a standard 3-wire SPI interface (CS, SCK, SO). Connect these pins to any digital I/O pins on your microcontroller. You will need to implement or use a library for the MAX31855 SPI protocol to read the compensated digital temperature value.

What is the accuracy of the temperature reading?

The module outputs temperature in 0.25°C increments. However, the overall system accuracy is determined by the K-type thermocouple itself, which typically has an accuracy in the range of ±2°C to ±6°C. The MAX31855 provides precise digital conversion of the thermocouple's signal.

Does the module require calibration?

The MAX31855 chip performs automatic cold-junction compensation using its internal temperature sensor, so no user calibration is typically required for the module itself. For highest accuracy, ensure your thermocouple probe is in good condition and properly connected to the terminal block.