各型热电偶分度对照表
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热电偶分度表K型热电偶分度表 K 参考端温度:0℃ 整10度mν值℃010********00.0000.3970.79801.20301.61102.02210004.09504.50804.91905.32705.73306.13720008.13708.53708.93809.34109.74510.15130012.20712.62313.03913.45613.87414.29240016.39516.81817.24117.66418.08818.51350020.64021.06621.49321.91922.34622.77260024.90225.32725.75126.17626.59927.02270029.12829.54729.96530.38330.79931.21480033.27733.68634.09534.50234.90935.31490037.32537.72438.12238.51938.91539.310100041.26941.65742.04542.43242.81743.202110045.10845.48645.86346.23846.61246.985120048.82849.19249.55549.91650.27650.633130052.39853.09353.09353.43953.78254.125N型热电偶分度表 N 参考端温度:0℃ 整10度mν值℃010********00.0000.2610.5250.79301.06501.34010002.77403.07203.37403.68003.98904.30220005.91306.24506.57906.91607.25507.59730009.34109.69610.05410.41310.77411.13640012.97413.34613.71914.09414.46914.84650016.74817.13117.51517.90018.28618.67260020.61321.00321.39321.78422.17522.56670024.52724.91925.31225.70526.09826.49180028.45528.84729.23929.63230.02430.41690032.37132.76133.15133.54133.93034.319100036.25636.64137.02737.41137.79538.179110040.08740.46640.84541.22341.60041.976120043.84644.21844.58844.95845.32645.694130047.513E型热电偶分度表 E 参考端温度:0℃ 整10度mν值℃010********00.0000.59101.19201.80102.41903.04710006.31706.99607.68308.37709.07809.78720013.41914.16114.90915.66116.41717.17830021.03321.81422.59723.38324.17124.96140028.94329.74430.54631.35032.15532.96050036.99937.80839.42640.23641.04541.85360045.08545.89146.69747.50248.30649.10970053.11053.90754.70355.49856.29157.08380061.02261.80662.58863.36864.14764.92490068.78369.54970.31371.07571.83572.593100076.358J型热电偶分度表 J 参考端温度:0℃ 整10度mν值℃010********00.0000.50701.01901.53602.05802.58510005.26805.81206.35906.90707.45708.00820010.77711.33211.88712.44212.99813.55330016.32516.87917.43217.98418.53719.08940021.84622.39722.94923.50124.05424.60750027.38827.94928.51129.07529.64230.21060033.09633.68334.27334.86735.46436.06670039.13039.75440.38241.01341.64742.28380045.49846.14446.79047.43448.07648.71690051.87552.49653.11553.72954.32154.948100057.94258.53359.12159.70860.29360.876110063.77764.35564.93365.51066.08766.664120069.536T型热电偶分度表 T 参考端温度:0℃ 整10度mν值℃010********00.0000.3910.78901.19601.61102.03510004.27704.74905.22705.71206.20406.70220009.28609.82010.36010.90511.45612.01130014.86015.44316.03016.62117.21717.816S型热电偶分度表 S 参考端温度:0℃ 整10度mν值℃010********00.0000.0550.1130.1730.2350.2991000.6450.7190.7950.8720.95001.02920001.44001.52501.61101.69801.78501.87330002.32302.41402.50602.59902.69202.78640003.26003.35603.45203.54903.64503.74350004.23404.33304.43204.53204.63204.73260005.23705.33905.44205.54405.64805.75170006.27406.38006.48606.59206.69906.80580007.34507.45407.56307.67207.78207.89290008.44808.56008.67308.78608.89909.012100009.58509.70009.81609.93210.04810.165110010.75410.87210.99111.11011.22911.348120011.94712.06712.18812.30812.42912.550130013.15513.27613.39713.51913.64013.761140014.36814.48914.61014.73114.85214.973150015.57615.69715.81715.93716.05716.176160016.77116.89017.00817.12517.24517.360R型热电偶分度表 R 参考端温度:0℃ 整10度mν值℃010********00.0000.0540.1110.1710.2320.2961000.6470.7230.8000.8790.95901.04120001.46901.55801.64801.73901.83101.92330002.40102.49802.59702.69602.79602.89640003.40803.51203.61603.72103.82703.93350004.47104.58004.69004.80004.91005.02160005.58305.69705.81205.92606.04106.15770006.74306.86106.98007.10007.22007.34080007.95008.07308.19708.32108.44608.57190009.20509.33309.46109.59009.72009.850100010.50610.63810.77110.90511.03911.173110011.85011.98612.12312.26012.39712.535120013.22813.36713.50713.64613.78613.926130014.62914.77014.91115.05215.19315.334140016.04016.18116.32316.46416.60516.746150017.45117.59117.73217.87218.01218.152160018.84918.98819.12619.26419.40219.540170020.22220.35620.48820.62020.74920.877B型热电偶分度表 B 参考端温度:0℃ 整10度mν值℃010********00.000-0.002-0.003-0.0020.0000.0021000.0330.0430.0530.0650.0780.0922000.1780.1990.2200.2430.2660.2913000.4310.4620.4940.5290.5610.5964000.7860.8270.8700.9130.95701.00250001.24101.29201.34401.39701.45001.50560001.79101.85101.91201.97402.03602.10070002.43002.49902.56902.63902.71002.78280003.15403.23103.30803.38703.46603.54690003.95704.04104.12604.21204.29804.386100004.83304.92405.01605.10905.20205.297110005.77705.87505.97306.07306.17206.273120006.78306.88706.99107.09607.20207.308130007.84507.95308.06308.17208.28308.393140008.95209.06509.17809.29109.40509.519150010.09410.21010.32510.44110.55810.674160011.25711.37411.49111.60810.72511.842170012.43612.54312.65912.77612.89213.008180013.58513.69913.814钨铼5-钨铼26热电偶分度表 W5/26 参考端温度:0℃ 整10度mν℃010********00.0000.1350.7230.4120.5540.69910001.45101.60701.76601.92502.08702.25020003.08903.26103.43503.60903.78503.96230004.86405.04705.23105.41605.60205.78840006.73106.92207.11307.30407.49607.68850008.65508.85009.04409.23909.43409.62960010.60610.80210.99711.19311.38811.58470012.55912.75312.94813.14213.33613.53080014.49414.68614.87815.06915.26015.45190016.39716.58516.77316.96017.14717.333100018.25718.44118.62318.80618.98719.169110020.06620.24420.42220.59820.77520.950120021.82021.99222.16322.33422.50522.674130023.51423.68023.84624.01124.17524.339140025.14925.30925.46825.62725.78525.943150026.72326.87727.03027.18327.33527.487160028.23628.38428.53128.67828.82428.970170029.68829.83029.97130.11230.25230.391180031.07931.21431.34931.48331.61731.750190032.40432.53332.66132.78932.91533.041200033.66033.78233.90334.02334.14234.260210034.84034.95335.06635.17735.28835.398220035.93236.03636.13936.24136.34136.441230036.92337.015钨铼3-钨铼25热电偶分度表 W3/25 参考端温度:0℃ 整10度mν℃010********00.0000.0980.1990.3050.4150.52810001.14501.27301.41401.55401.69601.84020002.60202.76102.92303.08703.25303.42030004.28604.46404.64404.82505.00805.19240006.12906.32006.51206.70506.89807.09350008.07708.27508.47508.67508.87509.07660010.08610.28910.49210.69510.89911.10370012.12412.32912.53412.73812.34313.14780014.17114.37614.58014.78514.98915.19490016.21116.41416.61716.81917.02117.223100018.22618.42618.62518.82419.02319.221110020.20620.40120.59720.79120.98621.180120022.14322.33422.52522.71522.90523.094130024.03324.22024.40624.59124.77624.961140025.87526.05726.23826.41826.59826.777150027.66627.84228.01828.19328.36828.542160029.40429.57529.74529.91430.08330.252170031.08531.24931.41331.57731.74031.902180032.70232.86033.01733.17433.33033.485190034.24834.39834.54734.69534.84334.989200035.70735.84835.98736.12636.26336.399210037.06337.19237.31937.44637.57137.694220038.29038.40438.51738.62838.73838.845230039.25639.453Pt100型热电阻分度表 Pt100 R(0℃)=100.00Ω 整10度电阻值℃010********0100103.9107.79111.67115.54119.4100138.51142.29146.07149.83153.58157.33200175.86179.53183.19186.84190.47194.1300212.05215.61219.15222.68226.21229.72400247.09250.53253.96257.38260.78264.18500280.98284.3287.62290.92294.21297.49600313.71316.92320.12323.3326.48329.64700345.28348.38351.46354.53357.59360.64800375.7378.68381.65384.6387.55390.48Pt10型热电阻分度表 Pt10 R(0℃)=10.00Ω 整10度电阻值Ω℃010********01010.3910.77911.16711.55411.9410013.85114.22914.60714.98315.35815.73320017.58617.95318.31918.68419.04719.4130021.20521.56121.91522.26822.62122.97240024.70925.05325.39625.73826.07826.41850028.09828.4328.76229.09229.42129.74960031.37131.69232.01232.3332.64832.96470034.52834.83835.14635.45335.75936.06480037.5737.86838.16538.4638.75539.048Cu50型热电阻分度表 Cu50 R(0℃)=50.000Ω 整10度电阻值Ω℃010********05052.14454.28556.42658.56560.70410071.473.54275.68677.83379.98282.134Cu100型热电阻分度表 Cu100 R(0℃)=100.00 整10度电阻值Ω℃010********0100104.29108.57112.85117.13121.41100142.8147.08151.37155.67159.96164.27:0℃ 整10度mν值6070809002.43602.85003.26603.68106.53906.93907.33807.73710.56010.96911.38111.79314.71215.13215.55215.97418.93819.36319.78820.21423.19823.62424.05024.47627.44527.86728.28828.70931.62932.04232.45532.86635.71836.12136.52436.92539.70340.09640.48840.87943.58543.96844.34944.72947.35647.72648.09548.46250.99051.34451.69752.04954.46654.807度:0℃ 整10度mν值6070809001.61901.90202.18902.48004.61804.93705.25905.58507.94108.28808.63708.98811.50111.86712.23412.60315.22515.60415.98416.33619.05919.44719.83520.22422.95823.35023.74224.13426.88327.27627.66928.06230.80731.19931.59031.98134.70735.09535.48235.86938.56238.94439.32639.70642.35242.72743.10143.47446.06046.42546.78947.152度:0℃ 整10度mν值6070809003.68304.32904.98305.64610.50111.22211.94912.68117.94218.71019.48120.25625.75426.54927.34528.14333.76734.57435.38236.19042.66243.47044.27845.08549.91150.71351.51352.31257.87358.66359.45160.23765.70066.47367.24568.01573.35074.10474.85775.608度:0℃ 整10度mν值6070809003.11503.64904.18604.72508.56009.11309.66710.22214.10814.66315.21715.77119.64020.19220.74321.29525.16125.71626.27226.82930.78231.35631.93332.51336.67137.28037.89338.51042.92243.56344.20744.85249.35449.98950.62151.24955.55356.15556.75357.34961.45962.03962.61963.19967.24067.81568.39068.964度:0℃ 整10度mν值6070809002.46702.90803.35703.81307.20707.71808.23508.75712.57213.13713.70714.281度:0℃ 整10度mν值607080900.3650.4320.5020.57301.10901.19001.27301.35601.96202.05102.14102.23202.88002.97403.06903.16403.84003.93804.03604.13504.83204.93305.03405.13605.85505.96006.06406.16906.91307.02007.12807.23608.00308.11408.22508.33609.12609.24009.35509.47010.28210.40010.51710.63511.46711.58711.70711.82712.67112.79212.91313.03413.88314.00414.12514.24715.09415.21515.33615.45616.29616.41516.53416.65317.47717.59417.71117.826度:0℃ 整10度mν值607080900.3630.4310.5010.57301.12401.20801.29401.38102.01702.11202.20702.30402.99703.09903.20103.30404.04004.14704.25504.36305.13305.24505.35705.47006.27306.39706.50706.62507.46107.58307.70507.82708.69708.82308.95009.07709.98010.11110.24210.37411.30711.44211.57811.71412.67312.81212.95013.08914.06614.20714.34714.48815.47515.61615.75815.89916.88717.02817.16917.31018.29218.43118.57118.71019.67719.81419.95120.08721.003度:0℃ 整10度mν值607080900.0060.0110.0170.0250.1070.1230.1400.1590.3170.3440.3720.4010.6320.6690.7070.74601.04801.09501.14301.19201.56001.61701.67401.73202.16402.23002.29602.36302.85502.92803.00303.07803.62603.70803.79003.87304.47404.56204.65204.74205.39105.48705.58305.68006.37406.47506.57706.68007.41407.52107.62807.73608.50408.61608.72708.83909.63409.74809.86309.97910.79010.90711.02411.14111.95912.07612.19312.31013.12413.23913.35413.470端温度:0℃ 整10度mν值607080900.8450.99401.14401.45102.41502.58102.74902.91904.14104.32004.50004.68205.97606.16406.35206.54107.88108.07408.26808.46109.82410.02010.21510.41111.77911.97412.16912.36413.72314.91614.10914.30215.64115.83116.02016.20917.51917.70417.88918.07419.34919.52919.70919.88821.12521.30021.47421.64722.84423.01223.18023.34724.50224.66524.82724.98826.10026.25726.41326.56827.63827.78827.93828.08729.11529.25929.40329.54630.53030.66830.80630.94331.88232.01432.14532.27533.16733.29133.41533.53834.37834.49534.61134.72635.50635.61435.72135.82736.54036.63736.73336.829考端温度:0℃ 整10度mν值607080900.6440.7650.88801.01501.98802.13702.29002.44503.59003.76103.93504.11005.37705.56305.75105.94007.28807.48407.68107.87909.27709.47909.68109.88311.30711.51111.71511.92013.35213.55713.76113.96615.39815.60115.80516.00817.42417.62517.82618.02619.41919.61619.81320.00921.37321.56621.75921.95123.28323.47123.65923.84625.14525.32825.51125.69326.95627.13427.31227.48928.71528.88829.06129.23330.41930.58730.75330.91932.06332.22432.38432.54333.63933.79233.94534.09735.13535.27935.42335.56636.53536.66836.80136.93337.81637.93738.05638.17438.95139.05539.15839.258100.00Ω 整10度电阻值Ω60708090123.24127.08130.9134.71161.05164.77168.48172.17197.71201.31204.9204.48233.21236.7240.18243.64267.56270.93274.29277.64300.75304.01307.25310.49332.79335.93339.06342.18363.67366.7369.71372.7110.00Ω 整10度电阻值Ω6070809012.32412.70813.0913.47116.10516.47716.84817.21719.77120.13120.4920.44823.32123.6724.01824.36426.75627.09327.42927.76430.07530.40130.72531.04933.27933.59333.90634.21836.36736.6736.97137.2710.000Ω 整10度电阻值Ω6070809062.84264.98167.1269.259=100.00 整10度电阻值Ω60708090125.68129.96134.24138.52。
K型热电偶分度表K 参考端温度:0℃整10度μν值
N型热电偶分度表
N 参考端温度:0℃整10度μν值
E型热电偶分度表
E 参考端温度:0℃整10度μν值
J型热电偶分度表
J 参考端温度:0℃整10度μν值
T型热电偶分度表
T 参考端温度:0℃整10度μν值
S型热电偶分度表
S 参考端温度:0℃整10度μν值
R 参考端温度:0℃整10度μν值
B 参考端温度:0℃整10度μν值
钨铼5-钨铼26热电偶分度表
W5/26 参考端温度:0℃整10度μν值
钨铼3-钨铼25热电偶分度表
W3/25 参考端温度:0℃整10度μν值
编辑本段热电阻
Pt100型热电阻分度表
Pt100 R(0℃)=100.00Ω 整10度电阻值Ω
Pt10型热电阻分度表
Pt10 R(0℃)=10.00Ω 整10度电阻值Ω
Cu50型热电阻分度表
Cu50 R(0℃)=50.000Ω 整10度电阻值Ω
Cu100型热电阻分度表
Cu100 R(0℃)=100.00 整10度电阻值Ω。
常用热电偶热电阻分度表热电偶热电阻分度表是一种用于测量温度的工具,广泛应用于各种工业领域中。
本文将介绍一些常用的热电偶热电阻分度表及其特点。
1. K型热电偶K型热电偶是一种常用的热电偶,适用于测量高温范围内的温度。
其测量范围为-200℃至1250℃,精度为±1.5℃或±0.25%。
K 型热电偶的热敏电势与温度的关系曲线是非线性的,在不同温度范围内的曲线也不同。
因此,需要根据使用环境选择适当的热电偶热电阻分度表。
2. J型热电偶J型热电偶是一种适用于低温范围的热电偶,其测量范围为-210℃至1200℃,精度为±1.5℃或±0.25%。
J型热电偶的热敏电势与温度的关系曲线也是非线性的,在不同温度范围内的曲线也不同。
需要根据使用环境选择适当的热电偶热电阻分度表。
3. T型热电偶T型热电偶是一种适用于低温范围的热电偶,其测量范围为-200℃至350℃,精度为±0.5℃或±0.4%。
T型热电偶的热敏电势与温度的关系曲线也是非线性的,在不同温度范围内的曲线也不同。
需要根据使用环境选择适当的热电偶热电阻分度表。
4. E型热电偶E型热电偶是一种适用于中温范围的热电偶,其测量范围为-270℃至1000℃,精度为±1.5℃或±0.25%。
E型热电偶的热敏电势与温度的关系曲线也是非线性的,在不同温度范围内的曲线也不同。
需要根据使用环境选择适当的热电偶热电阻分度表。
5. R型热电偶R型热电偶是一种适用于高温范围的热电偶,其测量范围为0℃至1600℃,精度为±1.5℃或±0.25%。
R型热电偶的热敏电势与温度的关系曲线也是非线性的,在不同温度范围内的曲线也不同。
需要根据使用环境选择适当的热电偶热电阻分度表。
6. S型热电偶S型热电偶是一种适用于高温范围的热电偶,其测量范围为0℃至1600℃,精度为±1.5℃或±0.25%。
S型热电偶)铂铑10-铂热电偶
铂铑10-铂热电偶(S型热电偶)为贵金属热电偶。
偶丝直径规定为0.5mm,允许偏差-0.015mm,其正极(SP)的名义化学成分为铂铑合金,其中含铑为10%,含铂为90%,负极(SN)为纯铂,故俗称单铂铑热电偶。
该热电偶长期最高使用温度为1300℃,短期最高使用温度为1600℃。
S型热电偶在热电偶系列中具有准确度最高,稳定性最好,测温温区宽,使用寿命长等优点。
它的物理,化学性能良好,热电势稳定性及在高温下抗氧化性能好,适用于氧化性和惰性气氛中。
由于S型热电偶具有优良的综合性能,符合国际使用温标的S型热电偶,长期以来曾作为国际温标的内插仪器,“ITS-90”虽规定今后不再作为国际温标的内查仪器,但国际温度咨询委员会(CCT)认为S型热电偶仍可用于近似实现国际温标。
S型热电偶不足之处是热电势,热电势率较小,灵敏读低,高温下机械强度下降,对污染非常敏感,贵金属材料昂贵,因而一次性投资较大。
(R型热电偶)铂铑13-铂热电偶
铂铑13-铂热电偶(R型热电偶)为贵金属热电偶。
偶丝直径规定为0.5mm,允许偏差-0.015mm,其正极(RP)的名义化学成分为铂铑合金,其中含铑为13%,含铂为87%,负极(RN)为纯铂,长期最高使用温度为1300℃,短期最高使用温度为1600℃。
R型热电偶在热电偶系列中具有准确度最高,稳定性最好,测温温区宽,使用寿命长等优点。
其物理,化学性能良好,热电势稳定性及在高温下抗氧化性能好,适用于氧化性和惰性气氛中。
由于R型热电偶的综合性能与S型热电偶相当,在我国一直难于推广,除在进口设备上的测温有所应用外,国内测温很少采用。
1967年至1971年间,英国NPL,美国NBS和加拿大NRC三大研究机构进行了一项合作研究,其结果表明,R型热电偶的稳定性和复现性比S型热电偶均好,我国目前尚未开展这方面的研究。
R型热电偶不足之处是热电势,热电势率较小,灵敏读低,高温下机械强度下降,对污染非常敏感,贵金属材料昂贵,因而一次性投资较大。
(B型热电偶)铂铑30-铂铑6热电偶
铂铑30-铂铑6热电偶(B型热电偶)为贵金属热电偶。
偶丝直径规定为0.5mm,允许偏差-0.015mm,其正极(BP)的名义化学成分为铂铑合金,其中含铑为30%,含铂为70%,负极(BN)为铂铑合金,含铑为量6%,故俗称双铂铑热电偶。
该热电偶长期最高使用温度为1600℃,短期最高使用温度为1800℃。
B型热电偶在热电偶系列中具有准确度最高,稳定性最好,测温温区宽,使用寿命长,测温上限高等优点。
适用于氧化性和惰性气氛中,也可短期用于真空中,但不适用于还原性气氛或含有金属或非金属蒸气气氛中。
B型热电偶一个明显的优点是不需用补偿导线进行补偿,因为在0~50℃范围内热电势小于3μV。
B型热电偶不足之处是热电势,热电势率较小,灵敏读低,高温下机械强度下降,对污染非常敏感,贵金属材料昂贵,因而一次性投资较大。
(K型热电偶)镍铬-镍硅热电偶
镍铬-镍硅热电偶(K型热电偶)是目前用量最大的廉金属热电偶,其用量为其
他热电偶的总和。
正极(KP)的名义化学成分为:Ni:Cr=90:10,负极(KN)的名义化学成分为:Ni:Si=97:3,其使用温度为-200~1300℃。
K型热电偶具有线性度好,热电动势较大,灵敏度高,稳定性和均匀性较好,抗氧化性能强,价格便宜等优点,能用于氧化性惰性气氛中。
广泛为用户所采用。
K型热电偶不能直接在高温下用于硫,还原性或还原,氧化交替的气氛中和真空中,也不推荐用于弱氧化气氛中。
(N型热电偶)镍铬硅-镍硅热电偶
镍铬硅-镍硅热电偶(N型热电偶)为廉金属热电偶,是一种最新国际标准化的
热电偶,是在70年代初由澳大利亚国防部实验室研制成功的它克服了K型热电偶的两个重要缺点:K型热电偶在300~500℃间由于镍铬合金的晶格短程有序而引起的热电动势不稳定;在800℃左右由于镍铬合金发生择优氧化引起的热电动势不稳定。
正极(NP)的名义化学成分为:Ni:Cr:Si=84.4:14.2:1.4,负极(NN)的名义化学成分为:Ni:Si:Mg=95.5:4.4:0.1,其使用温度为-200~1300℃。
N型热电偶具有线性度好,热电动势较大,灵敏度较高,稳定性和均匀性较好,抗氧化性能强,价格便宜,不受短程有序化影响等优点,其综合性能优于K型热
电偶,是一种很有发展前途的热电偶.
N型热电偶不能直接在高温下用于硫,还原性或还原,氧化交替的气氛中和真空中,也不推荐用于弱氧化气氛中。
(E型热电偶)镍铬-铜镍热电偶
镍铬-铜镍热电偶(E型热电偶)又称镍铬-康铜热电偶,也是一种廉金属的热电偶,正极(EP)为:镍铬10合金,化学成分与KP相同,负极(EN)为铜镍
合金,名义化学成分为:55%的铜,45%的镍以及少量的锰,钴,铁等元素。
该热电偶的使用温度为-200~900℃。
E型热电偶热电动势之大,灵敏度之高属所有热电偶之最,宜制成热电堆,测量微小的温度变化。
对于高湿度气氛的腐蚀不甚灵敏,宜用于湿度较高的环境。
E 热电偶还具有稳定性好,抗氧化性能优于铜-康铜,铁-康铜热电偶,价格便宜等优点,能用于氧化性和惰性气氛中,广泛为用户采用。
E型热电偶不能直接在高温下用于硫,还原性气氛中,热电势均匀性较差。
(J型热电偶)铁-铜镍热电偶
铁-铜镍热电偶(J型热电偶)又称铁-康铜热电偶,也是一种价格低廉的廉金属
的热电偶。
它的正极(JP)的名义化学成分为纯铁,负极(JN)为铜镍合金,
常被含糊地称之为康铜,其名义化学成分为:55%的铜和45%的镍以及少量却
十分重要的锰,钴,铁等元素,尽管它叫康铜,但不同于镍铬-康铜和铜-康铜的康铜,故不能用EN和TN来替换。
铁-康铜热电偶的覆盖测量温区为-200~1200℃,但通常使用的温度范围为0~750℃
J型热电偶具有线性度好,热电动势较大,灵敏度较高,稳定性和均匀性较好,价格便宜等优点,广为用户所采用。
J型热电偶可用于真空,氧化,还原和惰性气氛中,但正极铁在高温下氧化较快,故使用温度受到限制,也不能直接无保护地在高温下用于硫化气氛中。
(T型热电偶)铜-铜镍热电偶
铜-铜镍热电偶(T型热电偶)又称铜-康铜热电偶,也是一种最佳的测量低温的廉金属的热电偶。
它的正极(TP)是纯铜,负极(TN)为铜镍合金,常之为康铜,它与镍铬-康铜的康铜EN通用,与铁-康铜的康铜JN不能通用,尽管它们都叫康铜,铜-铜镍热电偶的盖测量温区为-200~350℃。
T型热电偶具有线性度好,热电动势较大,灵敏度较高,稳定性和均匀性较好,价格便宜等优点,特别在-200~0℃温区内使用,稳定性更好,年稳定性可小于
±3μV,经低温检定可作为二等标准进行低温量值传递。
T型热电偶的正极铜在高温下抗氧化性能差,故使用温度上限受到限制。