Watlow Reference and Guides
Louis Desloge Sr. founds Watlow Electric Manufacturing Company in St. Louis, Missouri, USA, to manufacture electric heating elements for the shoe industry. 1922 Watlow Sensors, […]
Temperature-Process
Millivolt Source with Digital Potentiometer
Here is a Millivolt Source i built for Calibration in the early days. It uses only CMOS Digital and Mixed Chips from Intersil and CD40xx […]
Thermocouple and Current Input Module
This input module converts J, K Thermocouple and 4-20 mA Inputs to 0-2V Full Scale. These can be used for any voltage/current inputs too. The […]
Temperature Calibrator Milli Volt Source
This is a Milli-Volt and Milli-Amp Source for Calibration of Temperature Measurement and Control Instruments using Thermocouples. There is also a Passive Variable Resistance Source […]
RTD PT100 Transmitter and Multiplexer
This is a RTD Pt-100 Transmitter, It can Convert Thermocouple mV or RTD mV to 4-20 mA Current Transmitter. The output is a current source […]
Mini RTD Pt100 Three Wire Transmitter
These are the circuits and boards of a Mini Temperature Transmitter for a Platinum hundred ohms temperature Sensor. The customer wanted a two wire system, […]
Design of a Thermocouple Amplifier.
This is just a formatted-edited email thread exported from Eudora from my mailbox using the content concentrator. The circuit above was made by TF a student, […]
Thermocouples and RTD Tables
The easiest way to measure temperature is with a glass diode like 1N4148 or a metal Transistor like 2N2222. These have a small temperature range, […]