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The Purpose of my sensing circuit is to regulate the temperature in a Steam Sauna which operates between the temperatures 30C - 60C

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  • Essay length: 3975 words
  • Submitted: 20/07/2012
  • Awarding body: OCR (for A-levels)
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AS and A Level Electrical & Thermal Physics

The first 200 words of this essay...

Introduction

A Sauna is a small room designed to be heated to very high temperatures, with well-controlled humidity. Saunaâs are used for both recreational and therapeutic purposes. There are different types of Sauna, all with different heat sources and temperature ranges.

Types Of Sauna

Finnish Sauna

Steam Sauna

Infrared Sauna

Temperature range (°C)

70-90

30-60

26-52

The Purpose of my sensing circuit is to regulate the temperature in a Steam Sauna which operates between the temperatures 30°C - 60°C

Sensor

My sensor is a thermistor (a temperature sensitive resistor).

There are two types of thermistors.

1. PTC (Positive Temperature Co-efficient) thermistors for which an increase in temperature increases its resistance

2. NTC (Negative Temperature Co-efficient) thermistors for which an increase in temperature decreases its resistance

Through my coursework I will be making use of a Negative temperature coefficient thermistor because I will be attempting to put a limit on the maximum temperature in the Sauna at which the steam generator can operate (also limiting the maximum temperature of the Sauna) by varying the potential difference across the steam generator as temperature

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