Digital Thermometer

What's a good digital thermometer that I can put in my tank?

I just bought a 20 gal. tank. I put the heater next to the filter near the middle/right side of the tank. I'm gonna put a thermometor on the left side. I want a reliable thermometor. I heard digital is the best kind. What is a good one?

I would go with the Coralife one. Its good, cheap, and easy to use. Perfect for a 20 gallon. Only cost me like seven bucks.

The answer to this simple question is not as simple as you might think. It has never been the case that a watch is a watch is a watch is a watch is a watch... and now, more than ever before watches are more than just little clocks.

Long before pocket sized multimedia devices became human bolt-ons the essential tool was the wrist watch. It's enduring practicality and visual appeal has seen it continue to thrive as, variously: a piece of jewellery; a life-style accessory; an essential tool; a personal statement and a desirable must-have.

Historically, the watch evolved from nature dependent devices such as water clocks and sun dials which existed in ancient Greece and Rome if not before. Then in the 1400s spring powered clocks were developed and two hundred years later these were adapted to be pocket watches. It was not really until the twentieth century that miniaturisation made wrist watches possible.

There are two types of watches; those with mechanical movement and those with electronic movement. Mechanical watches are the direct descendent of the original watch. With 'old-world' craftsmanship applied to cogs, wheels, springs and precision engineering. Strictly speaking they are less reliable, they can be sensitive to temperature, and mechanical components can be sensitive to wear and tear. But the beauty and precision is still very attractive to watch buyers – such craftsmanship in a watch somehow makes it a more personal and precious item.

Electronic watches have no moving parts to talk of. They use the innate electrical potential within a quartz crystal. These crystals emit a highly stable electronic pulse beat, so stable that you could set your watch by it. And indeed that is how electronic watches remain so accurate. They have miniature batteries to power the devices and to move the hands around the watch face.

There are technical innovations within each of these methods, including the incorporation of radio time signal electronic quartz watches which will periodically synchronise the time on the watch with a 'master clock', probably an atomic clock located remotely, thousands of miles away, somewhere else on the planet.

There are two forms of display on a watch. Analogue, i.e. a face and hands and digital, i.e. numerical readout through a liquid crystal display (LCD). These days many electronic watches will feature both types of interface on a single watch and mechanical watches can have small digital readouts embedded within them.

In term so functions on watches, the devices have now started to compete with the mobile phone to be portable computers and multimedia devices. However, where a watch will outperform a handheld computer is that it is more robust, more portable and smaller, enabling it to operate in extreme and specialist conditions. Certain watches such as the Technomarine Abyss Watch ABS05 will be water resistant up to 12,000meters. It is certainly fairly common for quality watch companies such as Tag Heuer to make watches with water resistance of up to 300m and almost standard for a watch to be water resistant to 100m. Other advanced watches such as the Tissot T-Touch have a collection of features presenting an overall performance mix. The Tissot T-Touch watch features a compass, an altimeter, a barometer, a thermometer and water resistance up to 100 meters. All of which extend the functionality of the watch making it ideal for active sports people.

Micro computing innovations have brought a wider range of functions to the watch. Already there are watch-phones to add to USB watches, MP3 players, audio recorders, MP4 video players and other 'gadgets'. However, watches remain essentially timing devices and lifestyle statements and accessories. Some of themmost innovative are the sports performance monitor watches such as the Polar Activity Monitor Watch AW200.

DIY 109b - ZedoMAX Digital Thermometer

Taylor 9842 Commercial Waterproof Digital Thermometer $11.39 Reduce the risk of cross-contamination with Taylor's instant reading thermometers with antibacterial Safe-T-Guard(TM) case. Unique case design inhibits bacterial growth and doubles as a calibration wrench. Dial models feature a 5'' stem and a 0 degrees to 220 degrees Ferinheight range. Digital model has a 5'' stem and a -40 degrees to 450 degrees Ferinheight range....

CDN DTQ450X ProAccurate Quick-Read Thermometer $9.99 NSF approved. 6-8 second response. Water proof and shatter proof. Data-hold. Big digit. Food-safe abs plastic. Recalibratable. On/off button. Temperature guide on sheath. Sheath can be used as handle extension. Mounting: pocket clip. Lr44 button battery included....

RT600C Superfast Waterproof Pocket Thermometer by ThermoWorks $24.00 ThermoWorks, the maker of the famous Thermapen now offers a nice cost-effective alternative in this RT600C instant-read digital pocket thermometer. It features a Super-Fast, reduced-tip probe for FAST 5- to 6-second readings. The sealed body of the thermometer features rubberized switch panels, a robust LCD window, and it withstands temperatures to 190°F in the dishwasher so you can record peak t...

Basal Digital Thermometer $6.99 Characteristics: * Digital * As accurate as glass * AccuBeep feature guarantees fast, accurate readings * Large, easytoread night light display * Auto memory shows last temperature * Fast, oneminute temperature readout * Oral, Underarm or Rectal...

BD Digital Basal Thermometer $8.29 Check Basal Temperature to: Increase likelihood of conception. Oral or Rectal Use. Lifetime guarantee (see package for details).Accu-Beep™ FeatureGuarantees fast, accurate readings Beeps when placed correctlyBonus: Exclusive Temperature Chart included by Toni Weschler, MPH, Author "Taking Charge of Your Fertility."Guaranteed AccuracyOnly the Accu-Beep™ feature guarantees fast, one-minute...

BD Digital Thermometer 1 ea $7.49 Please note: Due to packaging updates, the image shown may temporarily appear different from the product received.Safe for all agesFor oral, rectal or underarm use.Accu-Beep™ Feature:Guarantees fast, accurate readingsBeeps when placed correctlySignals when done.Large, easy-to-read night light display. Auto memory shows last temperature. Fast, one-minute temperature read-out.Guaranteed Accurac...

THERM DIGITAL PKT OVAL 5, EA, 13-0709 COOPER INSTRUMENT CORP THERMOMETERS $19.80 * Marked with correct temperature zones for food safety and product quality...

THERM DIGITAL POCKET, EA, 13-0684 FLUKE ELECTRONICS THERMOMETERS Limited Availibility...

Hydro Tools 9245 Buoy Floating Pool Thermometer $4.85 Includes detachable buoy top and self-adhesive disc leash....

Temperature Gun Infrared Thermometer w/ Laser Sight $31.99 Take accurate temperature readings with this laser-sighted infrared gun-style thermometer. Reads in Celsius or Fahrenheit, with a switch inside the battery compartment to choose between them. There's also a switch to turn on or off the laser sight. Features: Accuracy: ~2 degrees/ 2% Distance Spot Ratio: 12:1 C/F Selection Backlight Response Time: 500ms Auto Power Shut-Off Automatic Data Hold Low...

Extech EX330 Autoranging Mini Multimeter with Built In Thermometer with Type K Remote Probe $54.99 Combines a multimeter with a built-in noncontact AC voltage detector. Functions include capacitance, frequency, duty cycle and temperature. Cat. III-600V. UL listed. Large display and a host of features....

Digital Thermohygrometer, Temperature & Humidity Pen $59.95 Fast Response -- High Accuracy -- This portable, versatile instrument allows for quick, simultaneous readings of temperature and humidity. Small enough to fit in your shirt pocket, yet accurate and fast enough for industrial use. Has MIN/MAX memory function, HOLD. Temperature range: 14°F to 122°F (-10°C to 50°C). Humidity range: 20 to 90 per cent RH. Temperature accuracy: ±1.8°F (±1°C). Hu...

R-Probe Covers for Digital Ear Thermometers $4.20 ...

Open Thermal Sensor fo Mindstorms NXT This open thermal probe offers more rapid temperature readings than the protected thermal sensor. The probe is for use on dry surfaces and can be mounted to beakers, distillation columns, and other surfaces using steel bands (sold separately). The data line reaches 3 feet for flexibility of setup, and is hooked directly into the NXT Smartbrick. Solid construction and a rugged design with extra pr...

Pocket Size World Time Travel Alarm Clock with calendar Timer Temperature display and 3 LED flashlight - Black $12.79 Circular world time changer automatically adjusts the time when city is selected 18 World Time cities Perpetual calendar with full month view and date Temperature display - C/F selectable Alarm with 16 different wake up melodies LED flashlight - 3 bright white LED's 12/24-hour format selectable Countdown timer function Runs on 2 'AAA' batteries (not included) Unit Size: 5.2 x 1.5' x 1.5 LCD ...