Infrared thermometer temperature measurement when a variety of materials emissivity table

Emissivity(emissivity / emittance)The ratio of the radiation capacity of the object to the radiation capacity of the black body at the same temperature is called the emissivity or blackness of the object, also known as the radiation rate.

For most infrared thermometers, all that needs to be set is the rated emissivity of the material being measured, which is usually preset to 0.95, which is sufficient for measuring organic materials or painted surfaces.

Material & Condition Temperature Range (℃) Emissivity (near 1 micron) Emissivity (8 to 14 microns)
Steel：
Steel：Polished unoxidized 100~1200 0.05～0.1 0.05
Steel：Polished lightly oxidized 100~1200 0.45 0.35
Steel：Roughing unoxidized 100~1200 0.25～0.35 0.2～0.25
Steel：Slight oxidation in rough machining 100~1200 0.5～0.6 0.5
Steel：Severe oxidation 100~1200 0.8～0.95 0.7～0.95
Steel：Liquid 100~1200 0.35～0.45 0.3～0.4
Cast iron：
Cast iron：Polished unoxidized 100~1200 0.3 0.2
Cast iron：Polished lightly oxidized 100~1200 0.5 0.5
Cast iron：Roughing unoxidized 100~1200 0.5 0.5
Cast iron：Slight oxidation in rough machining 100~1200 0.75 0.5
Cast iron：Severe oxidation 100~1200 0.8～0.95 0.8～0.95
Cast iron：Liquid 100~1200 0.35～0.4 0.2～0.35
Aluminum：
Aluminum: Polished unoxidized Room temperature ~600 0.02~0.1 0.02~0.1
Aluminum: Polished lightly oxidized Room temperature ~600 0.2 0.2
Aluminum: Rough unoxidized Room temperature ~600 0.2~0.3 0.15~0.25
Aluminum: lightly oxidized in rough machining Room temperature ~600 0.3~0.4 0.2~0.4
Aluminium: Severe oxidation Room temperature ~600 0.4～0.45 0.3～0.4
Aluminum: Liquid Room temperature ~600 0.55～0.6 0.5～0.6
Stainless Steel:
Stainless steel: smooth surface Room temperature ~800 0.2～0.25 0.1～0.25
stainless steel: oxidation by 800 ℃ or more room temperature ~ 800 0.85 0.85
Tin and tinned steel plate:
Tin and tinned steel plate: unoxidized room temperature ~ 200 0.2 to 0.3 0.05 to 0.1
Tin and Tin-plated Steel: Slightly Oxidized Room temperature ~200 0.35~0.45 0.25~0.3
Tin and tin-plated steel plate: severe oxidation room temperature ~200 0.6 0.6
Chromium and its plating:
Chromium and its plating: unoxidized polished plating room temperature ~ 400 0.2 ~ 0.3 0.07 ~ 0.15
Chromium and its plating: Slightly oxidized plating Room temperature ~400 0.4~0.6 0.2~0.3
Chromium and its plating: severe oxidation plating room temperature ~400 0.7～0.8 0.3～0.4
chromium and its plating: chromium roughing unoxidized room temperature ~ 400 0.4 ~ 0.55 0.15 ~ 0.25
Chromium and its plating: Chromium roughing slightly oxidized Room temperature ~400 0.6～0.7 0.45～0.5
Chromium and its plating: chromium roughing severe oxidation Room temperature ~400 0.7～0.8 0.7～0.8
Copper：
Copper: polished unoxidized room temperature～260 0.06 0.04~0.05
Copper: polished slightly oxidized 100~1000 0.5 0.4
Copper: Severely oxidized 100~1000 0.8 0.8
Copper: liquid 100~1000 0.15~0.2 0.15~0.2
Iridium 100~1000 0.25~0.3
Yttrium 100~1000 0.3~0.35
Uranium 100~1000 0.5~0.55
Gold and gold plating:
Gold and gold plating: polished unoxidized 100~500 0.1~0.2 0.05~0.1
Gold and gold plating: lightly oxidized 100 to 500 0.4 to 0.5 0.2 to 0.3
Gold and gold plating: severe oxidation 100～500 0.6～0.8 0.3～0.4
Gold and gold plating:liquid 100～500 0.22 0.22
cobalt:
cobalt:polished unoxidized 100~1000 0.25 0.05
cobalt:polished slightly oxidized 100~1000 0.5 0.1~0.15
cobalt: polished severely oxidized 100~1000 0.7 0.25~0.3
Cobalt: roughing unoxidized 100~1000 0.35 0.1~0.15
Cobalt: roughing slightly oxidized 100~1000 0.55~0.6 0.2~0.25
Cobalt: Severe oxidation by rough machining 100~1000 0.7~0.75 0.25~0.3
cobalt: black sodium cobalt oxide 500 0.9～0.95 0.95
Nickel and its plating:
Nickel and its plating: polished unoxidized 100 to 1000 0.25 0.05
Nickel and its plating: polished slightly oxidized 100~1000 0.4 0.1~0.2
Nickel and its plating: polished severely oxidized 100~1000 0.8~0.9 0.4~0.55
Nickel and its plating: roughing unoxidized 500~1000 0.35 0.2~0.3
Nickel and its plating: roughing lightly oxidized 500~1000 0.5 0.5
Nickel and its plating: Roughing heavily oxidized 500~1000 0.8~0.9 0.85
Nickel and its plating: black nickel oxide 500~1000 0.8~0.9 0.8~0.9
Mercury (liquid) 0.2~0.25
Zirconium:
solid 0.32
liquid 0.32
Bismuth 0.34
lead:
Lead: polished unoxidized 50 to 300 0.3 0.05
Lead: Polished slightly oxidized 50 to 300 0.4 0.2
Lead: Polished severely oxidized 50 to 300 0.6 to 0.7 0.6 to 0.65
Lead: roughing unoxidized 0.4 0.3 to 0.4
Lead: roughing slightly oxidized 0.55 0.45
Lead: Roughing heavily oxidized 0.6 to 0.7 0.6 to 0.65
Silver and its plating:
Silver and its plating: polished unoxidized 100 to 900 0.02 0.01
Silver and its plating: polished slightly oxidized 100 to 900 0.04 0.02
Silver and its plating: rough unoxidized 100～900 0.1～0.25 0.05～0.1
Silver and its plating: roughing slightly oxidized 100～900 0.15～0.35 0.06～0.15
palladium 0.33
Antimony 0.5～0.65
Tungsten 1500 0.3 to 0.39 0.03
Band polished unoxidized 2000 0.3 to 0.37 0.04
(tungsten with lamp) 3000
molybdenum:
molybdenum: polished unoxidized 50～1000 0.3 0.05～0.1
Molybdenum: polished slightly oxidized 50 to 1000 0.4 0.25
Molybdenum: polished severely oxidized 50～1000 0.7～0.8 0.7～0.8
Molybdenum: roughing unoxidized 50～1000 0.4 0.1～0.15
Molybdenum: roughing slightly oxidized 50～1000 0.5～0.6 0.35
Molybdenum: roughing heavily oxidized 50 to 1000 0.8 0.8
platinum:
Platinum: polished unoxidized 50 to 1000 0.25 0.05
Platinum: Polished slightly oxidized 50 to 1000 0.3 0.1 to 0.15
Platinum: Polished severely oxidized 50 to 1000 0.4 0.3
Platinum: rough unoxidized 50 to 1000 0.3 0.1
Platinum: Roughing slightly oxidized 50 to 1000 0.4 0.2 to 0.3
Platinum: Roughing heavily oxidized 50 to 1000 0.4 to 0.5 0.4
platinum black 0.95 0.95
Titanium:
titanium: polished unoxidized 20 to 500 0.4 0.1
Titanium: polished slightly oxidized 20 to 500 0.5 0.2
Titanium: polished severely oxidized 20 to 500 0.8 0.6
Titanium: roughing unoxidized 20 to 500 0.5 0.3
Titanium: Roughing slightly oxidized Roughing heavily oxidized 20 to 500 0.65 0.4
0.8 0.6
titanium nitride 20 to 500 0.3 to 0.4 0.3 to 0.4
Tantalum:
Tantalum: polished unoxidized 100~1000 0.2 0.04
Tantalum: polished slightly oxidized 100~1000 0.45 0.3~0.4
Tantalum: Polished severely oxidized 100~1000 0.75~0.85 0.7~0.8
Tantalum: Roughing unoxidized 100~1000 0.3 0.1~0.15
Tantalum: Roughing slightly oxidized 100~1000 0.6 0.5
Tantalum: roughing heavily oxidized 100~1000 0.75~0.85 0.7~0.8
Zinc:
Zinc: polished unoxidized 20~400 0.2 0.02~0.05
Zinc: Polished slightly oxidized 20 to 400 0.3 0.1
Zinc: Polished severely oxidized 20～400 0.6 0.3
Zinc: Roughing unoxidized 20～400 0.3 0.06-0.08
Zinc: Roughing slightly oxidized 20～400 0.5 0.15
Zinc: Roughing heavily oxidized 20-400 0.6 0.3
Zirconium： 20～400
Zirconium: smooth unoxidized 20～400 0.25～0.3 0.22
Zirconium: smooth oxidized 20～400 0.4～0.5 0.4
Magnesium: polished unoxidized 20～400 0.1～0.2 0.07～0.13
Rhodium:
Rhodium：solid 30～260 0.29
rhodium: liquid 30～260 0.3
manganese:
manganese: solid 0.59
manganese: liquid 0.59 manganese: liquid
beryllium:
Beryllium: bright unoxidized 0.05-0.1 0.03-0.05
beryllium: bright oxidized 0.3 to 0.4 0.3 to 0.35
Brass:
brass: polished unoxidized 20 to 400 0.2 0.03
Brass: Polished slightly oxidized 20 to 400 0.4 0.2
brass: polished severely oxidized 20～400 0.7 0.6
Brass: roughing unoxidized 20～400 0.4 0.2
Brass: Roughing slightly oxidized 20～400 0.6 0.4
brass: roughing heavily oxidized 20 to 400 0.8 0.7
Conductor and manganese brass:
Copper and manganese copper: polished unoxidized 0～400 0.25 0.05
Copper(II) and Manganese(II): Polished slightly oxidized 0~400 0.45 0.2
Copper(Manganese) and Copper(Manganese): Polished heavily oxidized 0~400 0.65 0.35
Copper, manganese and copper: rough unoxidized 0~400 0.3 0.1
Copper, manganese and copper: roughing slightly oxidized 0～400 0.55 0.3
Copper and manganese copper: roughing heavily oxidized 0～400 0.7 0.5
Asbestos 0～400 0.8～0.9 0.9～0.95
asphalt 0～200 0.85～0.9 0.8～0.85
Nickel-chromium, nickel-aluminum thermoelectric alloy:
Nickel-chromium, nickel-aluminum thermoelectric alloy: polished unoxidized 0～400 0.3 0.3
Nickel-chromium, nickel-aluminum thermoelectric alloy: polished slightly oxidized 0～400 0.5 0.5
Nickel-Chromium, Nickel-Aluminium thermoelectric alloy: polished heavily oxidized 0～400 0.75～0.85 0.75～0.85
Nickel-chromium, nickel-aluminum thermoelectric alloy: roughing unoxidized 0～400 0.4 0.4
Nickel-chromium, nickel-aluminum thermoelectric alloy: roughing slightly oxidized 0～400 0.6 0.6
Nickel-chromium, nickel-aluminum thermoelectric alloy: roughing severe oxidation 0～400 0.8～0.85 0.8～0.85
Inconel (Inconel):
Inconel: polished unoxidized 0～400 0.3 0.1
Inconel: polished slightly oxidized 0～400 0.5 0.4
Chromium-nickel-iron alloy: polished severely oxidized 0～400 0.8～0.9 0.8～0.9
Chrome nickel-iron alloy: roughing unoxidized 0～400 0.45 0.25
Chrome nickel-iron alloy: roughing slightly oxidized 0～400 0.7 0.6
Inconel: Roughing heavily oxidized 0～400 0.8～0.9 0.8～0.9
Nickel-chromium-iron alloy: 0～400 0.3 0.2
Nickel-chromium heat-resistant alloy:
Nickel-chromium heat-resistant alloy:polished unoxidized 0～1000 0.4 0.35～0.4
Nickel-Chromium heat-resistant alloy:polished slightly oxidized 0～1000 0.8～0.9 0.8～0.9
Nickel-Chromium heat-resistant alloy: polishing severe oxidation 0～1000
Nickel-Chromium heat-resistant alloy: roughing unoxidized 0～1000 0.35～0.4 0.3
Nickel-Chromium heat-resistant alloy:Roughing slightly oxidized 0～1000 0.6 0.5
Nickel-Chromium heat-resistant alloy:Roughing heavily oxidized 0～1000 0.8～0.9 0.8～0.9
Monel:
monel: polished unoxidized 0 to 600 0.25 0.1
Monel: polished slightly oxidized 0～600 0.45 0.4
Monel: polished severely oxidized 0~600 0.7 0.7
Monel: roughing unoxidized 0～600 0.3 0.25
Monel: Roughing slightly oxidized 0～600 0.6 0.55
Monel: roughing heavily oxidized 0～600 0.8 0.8
Carbon 0～1500 0.8～0.85 0.85～0.9
Carbon Black 0～1500 0.95 0.95
graphite 0～1500 0.8 0.75～0.85
Cement and concrete 0～100 0.6～0.7 0.95
Paper and cardboard 0～100 0.8～0.95
paint and wax 0～100 0.9～0.95
Ocean dry paint, aluminum powder paint: 0～100 0.3～0.65
(smaller with increasing aluminum powder content)
rubber
rubber hard, black 0～100 0.9～0.95
rubber soft, gray 0.8～0.85
enamel 0～200 0.9
wood 0～100 0.8～0.9
ceramic 0～100 0.3～0.5 0.85～0.95
ceramic plating (on metal) 0～600 0.3～0.5 0.6～0.9
water (more than 50mm deep) 0～100 0.95
frost -10 0.98
snow -10 0.85
Ice -10 0.98
Paint 0～100 0.9～0.95
wall clay 0 to 100 0.9
sand 0～100 0.9
human skin 32 0.98
soil
soil:dry 20 0.92
soil:watery 20 0.95
Oil film
Oil film:0.001” thick 0.27
Oil film:0.002” thick 20 0.46
Oil film:0.005” thick 0.72 0.7～0.8
1000 0.4～0.5
Fabric 0～100 0.75～0.9
gypsum 0～100 0.8～0.95
brick
common red brick 20 0.8 0.93
Refractory red bricks 20 0.8 0.95
White refractory bricks 100 0.3 0.9
1000 0.3 0.7
Silica bricks 1000 0.5~0.6 0.75~0.85
Plastic
Infrared reflectivity 0.2 ~ 0.4 (many materials in the infrared absorption band, there are transparent areas, emissivity should be used with caution) 0 ~ 100 0.7 ~ 0.9
Limestone 0～100 0.4～0.6 0.95～0.98
Zirconia 0.4～0.45
Nickel oxide 0.85～0.9
Iron Oxide 0.6~0.95
Alumina 0.25～0.3
Cobalt Oxide 0.7～0.8
Uranium oxide 0.3
Magnesium oxide 0.15～0.45
Copper oxide 0.6~0.8
Thorium oxide 0.5~0.6
Tin oxide 0.3~0.55
Beryllium oxide 0.3~0.4
Sodium oxide 0.5~0.6
Niobium oxide 0.5~0.75
Cerium oxide 0.6～0.8
Titanium oxide 0.5
Palladium oxide 0.7
Silicon carbide 0.73
文档更新时间: 2023-05-30 14:15   作者：admin