Pax Instruments T400¶


Status	planned
Connectivity	USB/serial
Measurement range (A)	-270 - 1370 C
Resolution	0.1 C
Accuracy (94dB@1kHz)	1.5 C
Website	paxinstruments.com

The Pax Instruments T400 is a logging thermometer with four thermocouple inputs, USB connectivity, and MicroSD storage. It supports K type thermocouples.

Hardware¶

Microcontroller: Atmel ATmega32U4, 8 MHz, 3.3 V
ADC: Microchip MCP3424
Junction temperature: Microchip MCP9800
Screen: 132x64 LCD

Protocol¶

The T400 outputs CSV data in ASCII format over a USB serial port. Upon device boot or when a new log file is started a header is also output.

Here is a sample of the serial output when a new logging session has started:

v0.14-beta
File: LD0041.CSV
time (s), temp_0 (C), temp_1 (C), temp_2 (C), temp_3 (C)
      0, 24.86, 24.30, 25.83, 23.48
      1, 24.86, 24.30, 25.83, 23.48
      2, 24.86, 24.30, 25.83, 23.28
      3, 24.79, 24.22, 25.56, 23.21
      4, 24.99, 24.22, 25.56, 23.04
      5, 24.79, 24.22, 25.56, 23.21
      6, 24.74, 24.17, 25.51, 22.99
      7, 24.99, 24.22, 25.36, 23.04
      8, 24.94, 24.17, 25.31, 22.99
      9, 24.94, 24.17, 25.31, 22.99
     10, 24.94, 24.17, 25.31, 22.99
     11, 24.94, 24.17, 25.31, 22.99

Resources¶

Photos¶

Pax Instruments T400