Teledyne氧氣傳感器

Teledyne Analytical Instruments的微型燃料電池（Micro Fuel Cell）是一種獨(dú)特的電化學(xué)氧氣傳感器，通過(guò)結(jié)合以下功能提供多種氧氣傳感能力。在空氣（20.9%氧氣）中，電池的壽命為3至18個(gè)月，具體取決于電池類別。如果放在原始的氣體阻隔袋中，預(yù)期壽命每年只會(huì)縮短其“空氣中壽命”的1/20。保質(zhì)期通常為1至3年或更長(zhǎng)。微型燃料電池（Micro Fuel Cell）的90%響應(yīng)時(shí)間為5-60秒，也取決于電池類型。
微型燃料電池（Micro Fuel Cell）的設(shè)計(jì)對(duì)沖擊、振動(dòng)和位置不敏感。電池可以掉落而不會(huì)產(chǎn)生不利影響，也可以安裝在幾乎任何位置而不會(huì)改變靈敏度。由于氧氣取樣是擴(kuò)散控制的（通過(guò)膜），因此樣品氣體流過(guò)電池的速率并不重要。0.1至10升/分鐘范圍內(nèi)的流速不會(huì)導(dǎo)致讀數(shù)變化（前提是不會(huì)產(chǎn)生明顯的背壓。）

Teledyne氧氣傳感器工作原理

因此，O2傳感器作為燃料電池運(yùn)行，其輸出僅受氧氣進(jìn)入電池的速率和電池內(nèi)儲(chǔ)存的陽(yáng)極材料量的限制。這種輸出不足以使電池用作電源，而這是大多數(shù)燃料電池的目的。然而，該電池確實(shí)提供了足夠的輸出來(lái)直接驅(qū)動(dòng)儀表，或者在放大后，將提供能夠執(zhí)行更復(fù)雜功能的輸出。

Teledyne Analytical Instruments微型氧氣燃料電池（Micro Fuel Cell）物理特性
微型氧氣燃料電池（Micro Fuel Cell）是一種密封的一次性氧氣傳感器，直徑為1.25英寸，厚度為0.75英寸。它具有相對(duì)較大的感測(cè)區(qū)域（直徑0.7英寸），可以產(chǎn)生不需要放大來(lái)驅(qū)動(dòng)模擬顯示設(shè)備的高電平輸出信號(hào)。 大的傳感區(qū)域還減少了與樣品流中的蒸汽冷凝相關(guān)的讀數(shù)誤差，這些誤差通常會(huì)導(dǎo)致小傳感區(qū)域的傳感器讀數(shù)低甚至為零。 微型燃料電池（Micro Fuel Cell）的后部被一個(gè)由兩個(gè)同心箔組成的接觸板覆蓋。這些箔片與容納細(xì)胞的各種探針組件和樣品歧管中的彈簧加載觸點(diǎn)配合。

Teledyne Analytical Instruments氧氣傳感器特征
微型氧氣燃料電池（Micro Fuel Cell）結(jié)合了幾個(gè)重要功能，提供了TAI認(rèn)為目前可用的任何氧傳感器中理想和通用的性能特征。 使用微型燃料電池（Micro Fuel Cell）無(wú)需進(jìn)行任何維護(hù)。無(wú)需清潔或更換電極，無(wú)需更換電解質(zhì)或膜，無(wú)需經(jīng)過(guò)專門(mén)培訓(xùn)的操作人員，并將維護(hù)工時(shí)減少到很低限度。這可能是與提供分析儀器相關(guān)的重要的成本節(jié)約領(lǐng)域。與維護(hù)相關(guān)的成本可能是儀器本身初始成本的幾倍。
在沒(méi)有氧氣的情況下，微型燃料電池（Micro Fuel Cell）幾乎沒(méi)有輸出。這意味著使用這些傳感器的分析儀不需要“零”氣體。微型燃料電池（Micro Fuel Cell）對(duì)氧氣具有特異性，在存在其他無(wú)機(jī)和有機(jī)氣體的情況下不會(huì)產(chǎn)生輸出。**的例外是強(qiáng)無(wú)機(jī)氧化氣體，如氯、氟、溴等。
微型氧氣燃料電池（Micro Fuel Cell）的輸出穩(wěn)定，在恒定的氧氣濃度下運(yùn)行電池?cái)?shù)周，觀察到讀數(shù)變化不超過(guò)滿量程的±1%，這種情況并不罕見(jiàn)。TAI建議進(jìn)行2至4周的校準(zhǔn)檢查。然而，一些客戶每年只進(jìn)行2到4次校準(zhǔn)檢查，結(jié)果令人滿意。微型O2燃料電池（Micro Fuel Cell）旨在提供長(zhǎng)期、可靠的性能，并對(duì)氧氣濃度的變化做出快速響應(yīng)。氧電池的使用壽命取決于其暴露于氧氣的時(shí)間長(zhǎng)度和氧氣濃度的大小。

Teledyne Analytical Instruments氧氣傳感器種類和應(yīng)用

Class型號(hào)	Application應(yīng)用	Comments描述
A-1	Ultra-fast response (90% in less than 4 seconds) in the percent oxygen region.	Use only when B-1 response time is insufficient.
A-2C	Used for trace O2 measurements in CO2 containing backgrounds (0.1-100% CO2). CO2 must be present.	Use where acid gases are present (CO2, HCl, HCN, etc). CO2 must be present.
A-2CXL	Specially qualified A2C sensor to operate in XL model analyzers. Low range limit is 0-1 ppm.	Use where acid gases are present (CO2, HCl, HCN, etc). CO2 must be present.
A-5	Intermittent or continuous monitoring of percent O2 in gas mixtures containing 0-100% CO2. 90% response is time is 45 seconds.	Has more tolerance to exposure to air than A-3. No restrictions on CO2 concentration.
B-1	General purpose percent oxygen analysis where fast response is desired (90% in less than 7 seconds).	Use B-3 or C-3 where longer life is required and response time is relatively unimportant. May be used to spot check flue gas.
B-2C	General purpose trace O2 analysis for use in inert gas and hydrocarbon streams. Low range limit is 0-10 ppm.	May be used in CO2 free gas streams containing highly mobile gases such as H2, He and ethylene.
B-2CXL	Specially qualified B-2C sensor to operate in XL model analyzers. Low range limit is 0-1 ppm.	May be used in CO2 free gas streams containing highly mobile gases such as H2, He and ethylene.
B-3	Percent O2 analysis, best compromise between long life and fast response.	May be used to spot check flue gas.
B-5	Special application cell (non-standard) where long life and moderately fast response are required; B-5 has a factor of 3x the life of a B-3.	Requires 3x the amplifier gain of the B-3. Expected life is 36 months in air.
B-5F	Special application cell (non-standard) where long life and moderately fast response, in the presence of CO2, are required.	Uses Type F (acid electrolyte). Requires higher amplifier gain than normal. 90% response in 13 seconds. Expected life in air is 6 months.
B-7	Special application cell (non-standard) where fast response is required; the B-7 has a factor of 3x the life of a B-1 cell.	Requires 3x the amplifier gain of the B-1. Expected life in air is 24 months.
B-7F	Special application cell (non-standard) where moderate life and fast response, in the presence of CO2, are required.	Requires higher amplifier gain than normal. 90% response time is 7 seconds. Expected life in air is 3 months.
C-3	Percent O2 measurements where maximum cell life is desired (high O2 applications).	90% response time is 30 seconds. Expected life in air is 18 months.
C-5	Special application cell (non-standard) where long life is required; the C-5 has a factor of 3x the life of a C-3 cell.	Requires 3x the amplifier gain of the C-3. Expected life in air is 54 months.
C-5F	Special application cell (non-standard) where long life, in the presence of CO2, is required.	Requires higher amplifier gain than normal. 90% response time is 30 seconds. Expected life in air is 9 months.
C-6	Motion insensitive percent O2 measurements for use in hand held portable monitors.	Best cell for OEM safety applications.
InstaTrace	Special patented construction provides rapid recovery during initial cell installation; Low range limit is 0-10 ppm.	Used for trace O2 analysis in inert gas and hydrocarbon streams.
InstaTrace CO2	Special patented construction provides rapid recovery during initial cell installation by reducing the recovery period from several hours to just minutes. Used for trace O2 measurements in CO2 containing backgrounds (0-100% CO2) in the 3000T analyzer series.	Use where acid gases are present (CO2, HCl, HCN, etc). CO2 must be present. The INSTA TRACE Micro-fuel Cell oxygen sensor is capable of measuring below 1 ppm of oxygen within 15 minutes of installation.
InstaTrace XL	Specially qualified sensor to operate in XL model analyzers with a low range limit of 0-1 ppm.	Used for trace O2 analysis in inert gas and hydrocarbon streams.