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...
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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 64-bit number used as a unique identifier; depending on context it can be a memory address in 64-bit computing, or a permanent per-device ID such as a 1-Wire ROM code. When a device lists one, it usually means each unit has its own factory-set identifier, so software can tell apart multiple devices sharing a single data line.
- 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 a 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.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- 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 single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- 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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