ET-S60
Dual MAX31855 Thermocouple
Two K-type thermocouple channels on one board
AED 89.00
Out of stockOverview
Two K-type thermocouple channels on one board
The ET-S60 is built around the 2 × Analog Devices MAX31855K — K-type, −200…+1350°C, 0.25°C resolution, cold-junction compensated. It talks over Read-only SPI (SCK, SO, CS); 74LVC125A makes it 3.3V and 5V safe and runs from VIN 3.3–5V, onboard AP2112K.
Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.
Good for
- Two-zone ovens
- Inlet / outlet temperature
- Kiln and reflow profiling
Key features
What makes it different
Converter
2 × Analog Devices MAX31855K: K-type, −200…+1350°C, 0.25°C resolution, cold-junction compensated
Interface
Read-only SPI (SCK, SO, CS); 74LVC125A makes it 3.3V and 5V safe
Diagnostics
Open-circuit, short-to-GND and short-to-VCC fault bits
Supply
VIN 3.3–5V, onboard AP2112K
Open documentation
Schematic, BOM and layout notes published for every board.
Breadboard friendly
Standard 2.54 mm pitch and M2.5 mounting holes.
Specifications
Technical specifications
| Converter | 2 × Analog Devices MAX31855K: K-type, −200…+1350°C, 0.25°C resolution, cold-junction compensated |
|---|---|
| Interface | Read-only SPI (SCK, SO, CS); 74LVC125A makes it 3.3V and 5V safe |
| Diagnostics | Open-circuit, short-to-GND and short-to-VCC fault bits |
| Supply | VIN 3.3–5V, onboard AP2112K |
| Size | 38.1 × 25.4 mm |
|---|---|
| Mounting | 4 × M2.5 holes, 2.54 mm from each corner |
| Connectors | 7-pin 2.54 mm header · Screw terminal 2P 5.0mm 17A (THT) — Thermocouple T+ / T− |
| Main IC | MAX31855KASA+T (LCSC C52028) |
| Revision | Rev A |
| Libraries | Adafruit_MAX31855, CircuitPython adafruit_max31855, ESPHome max31855 |
|---|
Performance
Range
Pinout
Pin map and connections
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | Power | 3.3–5V |
| 2 | GND | Ground | Ground |
| 3 | 3V3 | Power | Regulator output |
| 4 | SCK | SPI | SPI clock ≤5MHz |
| 5 | MISO | SPI | SO, 3.3V |
| 6 | CS | SPI | Channel 1, active low |
| 7 | CS2 | Signal | Channel 2, active low |
Mechanical
Dimensions and what's in the box
In the box
- 1 × ET-S60 Dual MAX31855 Thermocouple (assembled)
- 1 × 7-pin 2.54 mm male header, unsoldered
Getting started
- Wire the header: VIN, GND, 3V3, SCK, MISO, CS
- Libraries: Adafruit_MAX31855, CircuitPython adafruit_max31855, ESPHome
max31855
Compare
Which thermocouple board?
| Dual MAX31855 Thermocouple (this board)This board | ET-S59 MAX31855 Thermocouple Amplifier | ET-S19 MAX31856 Thermocouple Amplifier | |
|---|---|---|---|
| What it does | Two K-type thermocouple channels on one board | K-type thermocouple reader to 1350 °C, 3.3/5 V SPI | Universal thermocouple interface, K/J/N/R/S/T/E/B |
| Interface | Read-only SPI (SCK, SO, CS); 74LVC125A makes it… | Read-only SPI (SCK, SO, CS); 74LVC125A makes it… | SPI (mode 1/3), up to ~1MHz through the BSS138… |
| Best for | Two-zone ovens | Kilns and furnaces | Kilns, ovens and reflow controllers |
| Price | 89 AED | 49 AED | 59 AED |
Downloads
Documents and design files
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