DFRobot
Gravity: CT1780 1-Wire K-Type Thermocouple Amplifier (-270℃ to +1372℃ Temp Range)
· MPN: SEN0656
The CT1780 is a cold-junction compensated amplifier for K-Type thermocouples, designed to make extreme temperature measurement easier to add to microcontroll...
The CT1780 is a cold-junction compensated amplifier for K-Type thermocouples, designed to make extreme temperature measurement easier to add to microcontroller projects. It digitises the tiny thermocouple signal and provides temperature readings with 0.25℃ resolution over a very wide measurement range.
Instead of using a separate data line for every probe, the module communicates over a Gravity Single Bus 1-Wire style interface. Multiple CT1780 units can be daisy-chained on a single data line, which is handy for multi-zone temperature monitoring in ovens, kilns, furnaces, BBQ smokers and lab setups.
An onboard DIP switch helps identify individual sensors in a multi-point network, working alongside the unique 64-bit address used by the 1-Wire protocol. The package includes the CT1780 amplifier board, a K Type thermocouple and a Gravity 3-pin cable.
Features:
- Cold-junction compensation: Improves accuracy when measuring with a K-Type thermocouple.
- 1-Wire communication: Uses a simple single data line for temperature data.
- Daisy-chain support: Multiple sensors can be connected on one data line.
- Onboard DIP switch: Allows a user-defined address for easier physical sensor identification.
- Unique 64-bit address: Uses the addressing capability inherent to the 1-Wire protocol.
- Extreme temperature range: Supports K-Type thermocouple measurements from -270℃ to +1372℃.
- High resolution: Provides 14-bit / 0.25℃ temperature measurement resolution.
Specifications:
- Input Voltage: 3.3~5.5V DC
- Thermocouple Type: K Type
- Measurement Range: -270℃~+1372℃
- Operating temperature range of the amplifier board: -40℃~+125℃
- Temperature measurement resolution: 14 bit/0.25℃
- Temperature measurement error: ≤±2℃（-200℃~700℃）, ±4℃（700℃~1350℃）
- Communication Interface: Gravity Single Bus
- Amplifier board size: 44*22mm
Well suited to DIY reflow ovens, ceramic and pottery kilns, metal forging and smelting, custom BBQ or smoker loggers, and scientific temperature measurement.
Jargon buster
Plain-language definitions for the technical terms used above.
- 1-Wire
- 1-Wire is a communication method where devices share a single data line, often with each device having its own address. It matters because several temperature modules can be connected to one microcontroller pin instead of needing a separate pin for each probe.
- 64-bit address
- A 64-bit address is a unique digital identifier used so a controller can tell one device from another on the same data line. It matters when several modules are daisy-chained, because software needs to know which physical temperature probe each reading came from.
- Cold-junction compensation
- Cold-junction compensation corrects for the temperature at the point where a thermocouple connects to the electronics. It matters because thermocouples measure temperature differences, so this correction is needed for more accurate real-world temperature readings.
- CT1780
- CT1780 is the part number for this thermocouple amplifier module. Checking the part number helps you find matching code, wiring guides, and replacement modules with the same interface and temperature-measurement behaviour.
- DIP switch
- A DIP switch is a small set of physical on/off switches used to configure hardware settings without software. It matters because changing features such as auto power-on or charging limits may require moving these tiny switches correctly.
- Gravity
- Gravity is DFRobot’s plug-in connector system for sensors, motors and modules, using standard cables to reduce loose jumper wiring. It matters because Gravity-compatible parts can connect directly to these ports, while non-Gravity parts may need adapters or manual wiring.
- K-Type
- K-Type refers to a common thermocouple probe type made from specific metal alloys and suited to very high temperature measurement. It matters because the amplifier and the probe type must match; a K-Type amplifier is intended for K-Type thermocouples, not every thermocouple style.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- Thermocouple
- A temperature sensor made from two different metals that produces a very small voltage depending on temperature. Because the signal is tiny, it usually needs careful amplification and accurate measurement hardware.
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