As a first step, I am looking to get a temperature logger to track the temperature of my mirror and ambient.
To do this, the solution I am looking at is a dual input temperature thermometer with k type thermocouples which I will simply attach to the back/and or side of my mirror using insulation tape and some insulation paste.
The unit is a D/Smith unit retailing for $98 and inlcudes one theromocoulple (Will get at least 1-2 more at $10 each).
Could not find a cheaper unit that takes 2 thermocouples and which displays at 0.1 degree increments. I can then play with various fan combinations to see what works best.
Any thoughts guys? Is this overkill or is there a cheaper way to do this?
p.s. have tried e-bay and Jaycar. These things are damn expensive!
**** SMITH DELUXE TEMPERATURE DUAL INPUT THERMOMETER
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A compact, handheld dual-input digital thermometer with 4.5 digit LCD screen and both Celsius and Fahrenheit readings. Provides Data Hold, selectable dual temperature or temperature differential displays, as well as a Relative mode which displays the difference between a reading and a preset value. Also includes a Min⁄max with time record mode, a Hi⁄Lo limit mode which sounds a beeper when a preset limit is exceeded, and Auto Power Off after 30 minutes.
Supplied with a K-type thermocouple with 4ft lead and Teflon tape coating which is insulated to 260°C.
Specifications :
Temperature metering range: -200 to 1,370°C (K-Type thermocouples),
-200 to 1,050°C (J-Type thermocouples).
Temperature range (supplied thermocouple): -40°C to 260°C
Resolution: 0.1°C
Accuracy: -200 to -50°C: +⁄- (0.05% reading + 0.3°C)
-50 to 1,370°C: +⁄- (0.05% reading + 0.7°C)
(for operating temperatures of 18 to 28°C)
Probe Accuracy: +⁄- 2.2°C or +⁄- 0.75% of reading (whichever is greater)
Reading Rate: 1 time per second
Battery: Standard 9V 216 type battery
Battery Life: approx. 100 hours with carbon zinc
Features:- Compact, handheld dual input digital thermometer.
- 4.5 Digit LCD
- Offers both Celsius and Fahrenheit readings
- Data Hold
- Selectable dual temperature or temperature differential displays
- Min⁄max with time record mode
- Hi⁄Lo limits mode sounds beeper when preset limit is exceeded
- Relative mode displays difference between reading and preset value
- K-Type thermocouples supplied: 4ft, teflon tape insulated to 260 degrees C.
- Auto power off after 30 minutes
- Range: -200 to 1,370 degrees C (K-Type) -200 to 1,050 degrees C (J-Type)
- Resolution: 0.1 degree C
- Accuracy: -200 to -50 degs C: +⁄- (0.05% rdg + 0.3 deg)
- -50 to 1,370 degs C: +⁄- (0.05% rdg + 0.7 deg)
- (for operating temperatures of 18 to 28 deg C)
- Probe Accuracy: +⁄- 2.2 deg C or +⁄- 0.75% of reading (whichever is greater)
- Reading Rate: 1 time per second
- Battery: Standard 9V battery
- Battery Life: approx. 100 hours with carbon zinc