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About Material

The following materials have high emissivity, and are well-suited for infrared thermometer measurements:

  • Plastic
  • Glass
  • Ceramics
  • Cloth
  • Skin
  • Water
  • Milk
  • Foliage
  • Soil

These materials have low emissivity characteristics, poor for IRT measurements:

  • Gold
  • Aluminum
  • Any shiny object

For details, please see the attached emissivity table.

Indoor Applications

  • Use the IRT to detect leeks within or the integrity of the insulation within your house. This can help reduce your AC/Heating bill.
  • Use the IRT to help detect the temperature of an overloading circuit breaker.
  • Use it to aid in early warning detection of an over-rated wire in a wall.
  • Use it to teach students and your children about the physics.

Outdoor Applications

  • You can determine the quality of a sleeping bag. Simply have someone lie inside the bag for five minutes. Then scan the outer surface using an infrared thermometer. If the temperature reading is very close to ambient temperature, then you will know that all of the body heat has been contained inside the bag, which means that the sleeping bag will be useful in keeping you warm. However, if the reading varies throughout the length of the sleeping bag, it is probably because the insulation is poor.
  • Measure the azimuth temperature (air temperature above your head). On a sunny warm day, the ambient temperature can be as high as 20degC. If the azimuth temperature is much lower than ambient, the climate will probably drop very quickly after sunset.

Automobile Applications

  • Check tire temperature. For example, in Formula-1 racing, a tire that has just completed a 60mph run will be very hot. The infrared thermometer can check for tire temperatures so that proper tire balancing and inflation may be completed.
  • Check the temperature of misfiring spark plugs, dead cylinder, and fuel injectors. Diagnose vehicle cooling systems and locate coolant leaks.
  • Perform the accurate measurement of thermostat open/closed temperatures. Perform A/C and heater core diagnostics, detect overheating electrical components, fuse links, and connectors.
  • Check catalytic inlet/outlet converters. If the catalytic converter functions properly, the outlet should have a higher temperature.

ZyTemp disclaimer: Never check the parts of a vehicle after ignition. Checking an automobile should only be done by trained professionals.

Radio Controller (R/C) racing

Temperature is an important index to fine tune the engine of a serious radio-car racer. ZyTemp's TN1 is a valuable device that can measure the temperature of the race car's engine because of its affordability and compact size.

Note to user: a more reliable method to obtain a highly accurate temperature is to switch to 'Max' Mode before scanning.

Cool and Fun Applications

  • The infrared thermometer (IRT) can detect a TV or computer that has been used one hour ago, simply by a one degree Celsius difference from ambient.
  • IRTs can locate an invisible thermal footprint.
  • IRTs can tell which chair had someone seated in it before.
  • Locate an object inside a plastic bag.

The Certificate of Calibration (optional) label guarantees the accuracy to match any high-end, high-performance infrared thermomether. ZyTemp's batch calibration testing process has brought down the cost of the TN1 by nearly five fold that of other $200 devices, which perform at comparable functionality.

Applications in Foodservice

These temperature standards are based on 1999 FDA Food Code. Critical Temperatures for Foodservice


Refrigerated potentially hazardous foods:
Frozen foods: 0°F or below
Check temperatures of food upon receipt and reject any potentially hazardous foods out of accepted ranges
Put perishable foods away promptly.


Refrigeration(air) temperature:38°F or below
Refrigeration(food) temperature:41°F or below
Refrigeration-Seafood(food) temperature:30-34°F
Refrigeration-Fresh Produce(food) temperature:
Deep chill:26-32°F
Freezer(food) temperature:0°F or below
Dry Storage:50-70°F
Use open shelving and do not cover with foil
Check foods in multiple locations throughout a cold storage area ,temperature may not be uniform
For ready-to-eat foods prepared on-site,label and comply with storage time stands(7 days maximum for food held at 41°F or below)


In the refrigerator:41°F or below
Under running water:70°F or below(water temperature)
Do not thaw at room temperature
If you thaw in a microwave, immediately begin cooking the food after wards.


Beef roast:145°F or 3 min. minimum or 140°F for 12min. or 130°F for 121 min.
Beef, steaks, pork, ham, fish, seafood (fillets, chops, or intact pieces), bacon:145°F for 15 sec., minimum
Ground beef, ground pork, chopped/flaked meals:155°F for 15 sec. minimum.
Food cooked in microwave:165°F hold 2 min. minimum
Fruits,vegetables:140°F(no minimum time)
Check your local regulations for variations on these standards
For combination dishes, choose the ingredient with the most stringent standard and follow it
Measure temperature in the thickest part of the food.

Cooking - Potentially Hazardous Food

From hot temperature: Cool to 70°F within 2 hours; and down to 41°F or below with 4more hours (6 hours total).
From room temperature: Cool to 41°F within 4 hours.
Do not cool at room temperature
Use a blast chiller or ice bath to hasten cooling.
Drive food into small units or use a shallow pan.


Hot Food:140°F or above
Cold Food:41°F or below
Keep food covered
Stir hot food frequently
Store utensil in food
Take actual food temperature; do not rely on a thermostat setting
Check temperature frequency(at least every 2 hours)
Do not use hot holding equipment to heat or reheat food.


Reheat leftovers to a minimum temperature of 165°F
Food must reach temperature within 2 hours.

Potentially Hazardous Foods

These foods favor bacterial growth and require strict temperature control;
Meat, poultry, eggs, seafood, dairy products, cut melon, raw seed sprout, garlic-in-oil mixture, cooked rice or potatoes, and others
Danger Zone:41 -140
Potentially hazardous foods exposed to this temperature range for a cumulative total of more than four hours are not safe to eat
More Temperatures
Handwashing water:110
Sanitizing solutions(heat):171 for 30 sec. minimum.

Founded in July 2000, ZyTemp belongs to world-class Infrared Technology-oriented thermometer manufacturer - Radiant Innovation Inc. and become a premier provider of infrared temperature measurement devices. Originally started from a professional team of engineers specializing in infrared thermometry, this company is now emerging as worldwide well-known manufacturer of infrared thermometers (IRT).

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