德国IFM温度传感器SI5000/易福门传感器的特性详情:
常用的非接触式测温仪表基于黑体辐射的基本定律,称为辐射测温仪表。辐射测温法包括亮度法(见光学高温计)、辐射法(见辐射高温计)和比色法(见比色温度计)。各类辐射测温方法只能测出对应的光度温度、辐射温度或比色温度。只有对黑体(吸收全部辐射并不反射光的物体)所测温度才是真实温度。如欲测定物体的真实温度,则必须进行材料表面发射率的修正。而材料表面发射率不仅取决于温度和波长,而且还与表面状态、涂膜和微观组织等有关,因此很难测量。在自动化生产中往往需要利用辐射测温法来测量或控制某些物体的表面温度,如冶金中的钢带轧制温度、轧辊温度、锻件温度和各种熔融金属在冶炼炉或坩埚中的温度。在这些具体情况下,物体表面发射率的测量是相当困难的。对于固体表面温度自动测量和控制,可以采用附加的反射镜使与被测表面一起组成黑体空腔。附加辐射的影响能提高被测表面的有效辐射和有效发射系数。利用有效发射系数通过仪表对实测温度进行相应的修正,终可得到被测表面的真实温度。为典型的附加反射镜是半球反射镜。球中心附近被测表面的漫射辐射能受半球镜反射回到表面而形成附加辐射,从而提高有效发射系数式中ε为材料表面发射率,ρ为反射镜的反射率。至于气体和液体介质真实温度的辐射测量,则可以用插入耐热材料管至一定深度以形成黑体空腔的方法。通过计算求出与介质达到热平衡后的圆筒空腔的有效发射系数。在自动测量和控制中就可以用此值对所测腔底温度(即介质温度)进行修正而得到介质的真实温度。 公司名称:上海颖哲工业自动化设备有限公司
电话: 传真: QQ:791072902
委托代理:望贤会 税号:318
开户行:上海银行愚园路支行 帐号:3164 63
德国IFM温度传感器SI5000/易福门传感器的特性详情:非接触测温优点:测量上限不受感温元件耐温程度的限制,因而对高可测温度原则上没有限制。对于1800℃以上的高温,主要采用非接触测温方法。随着红外技术的发展,辐射测温

温度传感器
逐渐由可见光向红外线扩展,700℃以下直至常温都已采用,且分辨率很高。
当有两种不同的导体和半导体A和B组成一个回路,其两端相互连接时,只要两结点处的温度不同,一端温度为T,称为工作端或热端,另一端温度为TO,称为自由端(也称参考端)或冷端,则回

温度传感器
路中就有电流产生,
德国IFM温度传感器SI5000/易福门传感器的特性详情:
如图2-1(a)所示,即回路中存在的电动势称为热电动势。这种由于温度不同而产生电动势的现象称为塞贝克效应。与塞贝克有关的效应有两个:其一,当有电流流过两个不同导体的连接处时此处便吸收或放出热量(取决于电流的方向),称为珀尔帖效应;其二,当有电流流过存在温度梯度的导体时,导体吸收或放出热量(取决于电流相对于温度梯度的方向),称为汤姆逊效应。两种不同导体或半导体的组合称为热电偶。热电偶的热电势EAB(T,T0)是由接触电势和温差电势合成的。接触电势是指两种不同的导体或半导体在接触处产生的电势,此电势与两种导体或半导体的性质及在接触点的温度有关。温差电势是指同一导体或半导体在温度不同的两端产生的电势,此电势只与导体或半导体的性质和两端的温度有关,而与导体的长度、截面大小、沿其长度方向的温度分布无关。无论接触电势或温差电势都是由于集中于接触处端点的电子数不同而产生的电势,热电偶测量的热电势是二者的合成。当回路断开时,在断开处a,b之间便有一电动势差△V,其极性和大小与回路中的热电势一致。并规定在冷端,当电流由A流向B时,称A为正极,B为负极。实验表明,当△V很小时,△V与△T成正比关系。定义△V对△T的微分热电势为热电势率,又称塞贝克系数。塞贝克系数的符号和大小取决于组成热电偶的两种导体的热电特性和结点的温度差。公司名称:上海颖哲工业自动化设备有限公司
电话: 传真: QQ:791072902
委托代理:望贤会 税号:318
开户行:上海银行愚园路支行 帐号:3164 63
德国IFM温度传感器SI5000/易福门传感器的特性详情:
| E11256 | Verschlußkappe M8 (10-er Pack) | E11344 | VDOAH030MSS006H03STGF030MSS |
| E11257 | ADOAH040VAS0060E04 | E11345 | VDOAH030MSS0005H03STGF030MSS |
| E11258 | SSTGH040MSSFPKG | E11346 | VDOAH032MSS003H03STGF030MSS |
| E11259 | VDOGH040MSS0001H04STGF040MSS | E11347 | VDOAH032MSS006H03STGF030MSS |
| E11260 | VDOGH040MSS0002H04STGF040MSS | E11348 | VDOAH032MSS0001H03STGF030MSS |
| E11261 | VDOAH040MSS0001H04STGF040MSS | E11349 | VDOAH032MSS0002H03STGF030MSS |
| E11262 | VDOAH040MSS0002H04STGF040MSS | E11350 | VDOAH032MSS0005H03STGF030MSS |
| E11263 | VDOGH040MSS0001H03STGF030MSS | E11351 | VDOGF030MSS003H03STGF040MSS |
| E11264 | VDOGH040MSS0002H03STGF030MSS | E11352 | VDOGF030MSS006H03STGF040MSS |
| E11265 | VDOAH040MSS0001H03STGF030MSS | E11354 | VDOAF030MSS003H03STGF040MSS |
| E11266 | VDOAH040MSS0002H03STGF030MSS | E11355 | VDOAF030MSS006H03STGF040MSS |
| E11267 | VDOGF030MSS0001H03STGF040MSS | E11356 | VDOAF030MSS0001H03STGF040MSS |
| E11268 | VDOGF030MSS0002H03STGF040MSS | E11357 | VDOAF030MSS0002H03STGF040MSS |
| E11270 | METRISCHE KABVERSHR M20 | E11358 | VDOAF030MSS0005H03STGF040MSS |
| E11273 | ADOGR040PLS0002H | E11359 | VDOGF040MSS003H04STGF040MSS |
| E11274 | VDOAR040PLS0002HSTGH040VAS | E11360 | VDOGF040MSS006H04STGF040MSS |
| E11275 | VDOAF030MSS0003X03STFG030MSS | E11361 | VDOGF040MSS0005H04STGF040MSS |
| E11276 | VDOAF030MSS0004X03STFG030MSS | E11362 | VDOAF040MSS003H04STGF040MSS |
| E11277 | VDOAA040PLS075H03STGH050MSS | E11363 | VDOAF040MSS006H04STGF040MSS |
| E11278 | Mounting kit IND/Nelles 1 | E11364 | VDOAF040MSS0005H04STGF040MSS |
| E11280 | Mounting kit IND/Nelles 3 | E11365 | VDOGH040MSS003H04STGF040MSS |
| E11281 | IF-PROGRAMMER 16R | E11366 | VDOGH040MSS006H04STGF040MSS |
| E11282 | ASTGH040MSS0003H04 | E11367 | VDOGH040MSS0005H04STGF040MSS |
| E11283 | ADOAH040MSS0006H04 | E11368 | VDOAH040MSS003H04STGF040MSS |
| E11284 | ADOAH040MSS0010H04 | E11369 | VDOAH040MSS006H04STGF040MSS |
| E11285 | ENDKAPPE/IAE | E11370 | VDOAH040MSS0005H04STGF040MSS |
| E11286 | ENDKAPPE/IBE | E11371 | VDOAH043MSS003H04STGF040MSS |
| E11287 | MONTAGESOCKEL/IME/3L | E11372 | VDOAH043MSS006H04STGF040MSS |
| E11288 | MONTAGESOCKEL/IME/2L | E11373 | VDOAH043MSS0001H04STGF040MSS |
| E11289 | MONTAGESOCKEL/ICE | E11374 | VDOAH043MSS0002H04STGF040MSS |
| E11290 | MONTAGESOCKEL/IDE/KDE | E11375 | VDOAH043MSS0005H04STGF040MSS |
| E11376 | VDOGF030MSS003H03STGH030MSS | E11451 | VDOGH040MSS003H04STGH040MSS |
| E11377 | VDOGF030MSS006H03STGH030MSS | E11452 | VDOGH040MSS006H04STGH040MSS |
| E11378 | VDOGF030MSS0001H03STGH030MSS | E11453 | VDOGH040MSS0001H04STGH040MSS |
| E11379 | VDOGF030MSS0002H03STGH030MSS | E11454 | VDOGH040MSS0002H04STGH040MSS |
| E11380 | VDOGF030MSS0005H03STGH030MSS | E11455 | VDOGH040MSS0005H04STGH040MSS |
| E11381 | VDOAF030MSS003H03STGH030MSS | E11456 | VDOAH040MSS003H04STGH040MSS |
| E11382 | VDOAF030MSS006H03STGH030MSS | E11457 | VDOAH040MSS006H04STGH040MSS |
| E11383 | VDOAF030MSS0001H03STGH030MSS | E11458 | VDOAH040MSS0001H04STGH040MSS |
| E11384 | VDOAF030MSS0002H03STGH030MSS | E11459 | VDOAH040MSS0002H04STGH040MSS |
| E11385 | VDOAF030MSS0005H03STGH030MSS | E11460 | VDOAH040MSS0005H04STGH040MSS |
| E11386 | VDOAF032MSS003H03STGH030MSS | E11461 | VDOAH043MSS003H04STGH040MSS |
| E11387 | VDOAF032MSS006H03STGH030MSS | E11462 | VDOAH043MSS006H04STGH040MSS |
| E11388 | VDOAF032MSS0001H03STGH030MSS | E11463 | VDOAH043MSS0001H04STGH040MSS |
| E11389 | VDOAF032MSS0002H03STGH030MSS | E11464 | VDOAH043MSS0002H04STGH040MSS |
| E11390 | VDOAF032MSS0005H03STGH030MSS | E11465 | VDOAH043MSS0005H04STGH040MSS |
| E11391 | VDOGF040MSS003H03STGH030MSS | E11466 | VDOGH040MSS003H04STAH040MSS |
| E11392 | VDOGF040MSS006H03STGH030MSS | E11467 | VDOGH040MSS006H04STAH040MSS |
| E11393 | VDOGF040MSS0001H03STGH030MSS | E11468 | VDOGH040MSS0001H04STAH040MSS |
| E11394 | VDOGF040MSS0002H03STGH030MSS | E11469 | VDOGH040MSS0002H04STAH040MSS |
| E11395 | VDOGF040MSS0005H03STGH030MSS | E11470 | VDOGH040MSS0005H04STAH040MSS |
| E11396 | VDOAF040MSS003H03STGH030MSS | E11471 | VDOAH040MSS003H04STAH040MSS |
| E11397 | VDOAF040MSS006H03STGH030MSS | E11472 | VDOAH040MSS006H04STAH040MSS |
| E11398 | VDOAF040MSS0001H03STGH030MSS | E11473 | VDOAH040MSS0001H04STAH040MSS |
| E11399 | VDOAF040MSS0002H03STGH030MSS | E11474 | VDOAH040MSS0002H04STAH040MSS |