CSB-EL011580RA大鼠白介素10(IL-10)ELISA KIT
Rat Interleukin 10（IL-10）
ELISA Kit
Catalog No. CSB-E04595r
（96T）
l This immunoassay kit allows for the in vitro quantitative determination of rat IL-10 concentrations in serum, plasma ａnd Tissue Homogenates.
l Expiration date six months from the date of manufacture
l FOR RESEARCH USE ONLY. NOT FOR USE IN DIAGNOSTIC PROCEDURES.
PRINCIPLE OF THE ASSAY
The microtiter plate provided in this kit has been pre-coated with an antibody specific to IL-10. Standards or samples are then added to the appropriate microtiter plate wells with a biotin-conjugated polyclonal antibody preparation specific for IL-10 and Avidin conjugated to Horseradish Peroxidase （HRP） is added to each microplate well ａnd incubated. Then a TMB （3,3＇,5,5＇ tetramethyl-benzidine） substrate solution is added to each well. Only those wells that contain IL-10, biotin-conjugated antibody ａnd enzyme-conjugated Avidin will exhibit a change in color. The enzyme-substrate reaction is terminated by the addition of a sulphuric acid solution ａnd the color change is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm. The concentration of IL-10 in the samples is then determined by comparing the O.D. of the samples to the standard curve.
DETECTION RANGE
3.12 pg/ml-200 pg/ml. The standard curve concentrations used for the ELISA’s were 200 pg/ml, 100 pg/ml, 50 pg/ml, 25 pg/ml, 12.5 pg/ml, 6.25 pg/ml, 3.12 pg/ml.
SPECIFICITY
This assay recognizes rat IL-10. No significant cross-reactivity or interference was observed.
SENSITIVITY
The minimum detectable dose of rat IL-10 is typically less than 0.78 pg/ml.
The sensitivity of this assay, or Lower Limit of Detection （LLD） was defined as the lowest protein concentration that could be differentiated from zero.
MATERIALS PROVIDED
| Reagent | Quantity |
| Assay plate | 1 |
| Standard | 2 |
| Sample Diluent | 1 x 20 ml |
| Biotin-antibody Diluent | 1 x 10 ml |
| HRP-avidin Diluent | 1 x 10 ml |
| Biotin-antibody | 1 x 120μl |
| HRP-avidin | 1 x 120μl |
| Wash Buffer | 1 x 20 ml （25×concentrate） |
| TMB Substrate | 1 x 10 ml |
| Stop Solution | 1 x 10 ml |
STORAGE
1. Unopened test kits should be stored at 2-8°C upon receipt ａnd the microtiter plate should be kept in a sealed bag. The test kit may be used throughout the expiration date of the kit, provided it is stored as prescribed above. Refer to the package label for the expiration date.
2. Opened test plate should be stored at 2-8°C in the aluminum foil bag with desiccants to minimize exposure to damp air. The kits will remain stable until the expiring date shown, provided it is stored as prescribed above.
3. A microtiter plate reader with a bandwidth of 10 nm or less ａnd an optical density range of 0-3 OD or greater at 450nm wavelength is acceptable for use in absorbance measurement.
REAGENT PREPARATION
Bring all reagents to room temperature before use.
1. Wash Buffer If crystals have formed in the concentrate, warm up to room temperature ａnd mix gently until the crystals have completely dissolved. Dilute 20 ml of Wash Buffer Concentrate into deionized or distilled water to prepare 500 ml of Wash Buffer.
2. Standard Centrifuge the standard vial at 6000-10000rpm for 30s. Reconstitute the Standard with 1.0 ml of Sample Diluent. This reconstitution produces a stock solution of 200 pg/ml. Allow the standard to sit for a minimum of 15 minutes with gentle agitation prior to making serial dilutions. The undiluted standard serves as the high standard （200 pg/ml）. The Sample Diluent serves as the zero standard （0 pg/ml）. Prepare fresh for each assay. Use within 4 hours ａnd discard after use.
3. Biotin-antibody Centrifuge the vial before opening. Dilute to the working concentration using Biotin-antibody Diluent（1:100）, respectively.
4. HRP-avidin Centrifuge the vial before opening. Dilute to the working concentration using HRP-avidin Diluent（1:100）, respectively.
Precaution: The Stop Solution provided with this kit is an acid solution. Wear eye, hand, face, ａnd clothing protection when using this material.
OTHER SUPPLIES REQUIRED
— Microplate reader capable of measuring absorbance at 450 nm, with the correction wavelength set at 540 nm or 570 nm.
— Pipettes ａnd pipette tips.
— Deionized or distilled water.
— Squirt bottle, manifold dispenser, or automated microplate washer.
— An incubator which can provide stable incubation conditions up to 37°C±0.5°C.
SAMPLE COLLECTION AND STORAGE
l Serum Use a serum separator tube （SST） ａnd allow samples to clot for 30 minutes before centrifugation for 15 minutes at 1000 g. Remove serum ａnd assay immediately or aliquot and store samples at -20°C. Centrifuge the sample again after thawing before the assay. Avoid repeated freeze-thaw cycles.
l Plasma Collect plasma using citrate, EDTA, or heparin as an anticoagulant. Centrifuge for 15 minutes at 1000 g within 30 minutes of collection. Assay immediately or aliquot ａnd store samples at -20°C. Centrifuge the sample again after thawing before the assay. Avoid repeated freeze-thaw cycles.
l Tissue Homogenates 100mg tissue was rinsed with 1X PBS, homogenized in 1 mL of 1X PBS ａnd stored overnight at -20° C. After two freeze-thaw cycles were performed to break the cell membranes, the homogenates were centrifuged for 5 minutes at 5000 x g, 2 - 8°C. The supernate was assayed ａnd removed immediately. Alternatively, aliquot ａnd store samples at -20°C or -80℃. Centrifuge the sample again after thawing before the assay. Avoid repeated freeze-thaw cycles.
Note: Grossly hemolyzed samples are not suitable for use in this assay.
ASSAY PROCEDURE
Bring all reagents ａnd samples to room temperature before use. It is recommended that all samples, standards, ａnd controls be assayed in duplicate. All the reagents should be added directly to the liquid level in the well. The pipette should avoid contacting the inner wall of the well.
1. Add 100μl of Standard, Blank, or Sample per well. Cover with the adhesive strip. Incubate for 2 hours at 37°C.
2. Remove the liquid of each well, don’t wash.
3. Add 100μl of Biotin-antibody working solution to each well. Incubate for 1 hour at 37°C. Biotin-antibody working solution may appear cloudy. Warm up to room temperature ａnd mix gently until solution appears uniform.
4. Aspirate each well ａnd wash, repeating the process three times for a total of three washes. Wash: Fill each well with Wash Buffer （200μl） ａnd let it stand for 2 minutes, then remove the liquid by flicking the plate over a sink. The remaining drops are removed by patting the plate on a paper towel. Complete removal of liquid at each step is essential to good performance.
5. Add 100μl of HRP-avidin working solution to each well. Cover the microtiter plate with a new adhesive strip. Incubate for 1 hour at 37°C.
6. Repeat the aspiration ａnd wash five times as step 4.
7. Add 90μl of TMB Substrate to each well. Incubate for 10-30 minutes at 37°C. Keeping the plate away from drafts ａnd other temperature fluctuations in the dark.
8. Add 50μl of Stop Solution to each well when the first four wells containing the highest concentration of standards develop obvious blue color. If color change does not appear uniform, gently tap the plate to ensure thorough mixing.
9. Determine the optical density of each well within 30 minutes, using a microplate reader set to 450 nm.
CALCULATION OF RESULTS
Using the professional soft "Curve Exert 1.3" to make a standard curve is recommended, which can be downloaded from our web.
Average the duplicate readings for each standard, control, ａnd sample ａnd subtract the average zero standard optical density. Create a standard curve by reducing the data using computer software capable of generating a four parameter logistic （4-PL） curve-fit. As an alternative, construct a standard curve by plotting the mean absorbance for each standard on the x-axis against the concentration on the y-axis ａnd draw a best fit curve through the points on the graph. The data may be linearized by plotting the log of the IL-10 concentrations versus the log of the O.D. ａnd the best fit line can be determined by regression analysis. This procedure will produce an adequate but less precise fit of the data. If samples have been diluted, the concentration read from the standard curve must be multiplied by the dilution factor.
LIMITATIONS OF THE PROCEDURE
— The kit should not be used beyond the expiration date on the kit label.
— Do not mix or substitute reagents with those from other lots or sources.
— It is important that the Standard Diluent selected for the standard curve be consistent with the samples being assayed.
— If samples generate values higher than the highest standard, dilute the samples with the appropriate Standard Diluent ａnd repeat the assay.
— Any variation in Standard Diluent, operator, pipetting technique, washing technique, incubation time or temperature, ａnd kit age can cause variation in binding.
— This assay is designed to eliminate interference by soluble receptors, binding proteins, and other factors present in biological samples. Until all factors have been tested in the Immunoassay, the possibility of interference cannot be excluded.
TECHNICAL HINTS
— Centrifuge vials before opening to collect contents.
— When mixing or reconstituting protein solutions, always avoid foaming.
— To avoid cross-contamination, change pipette tips between additions of each standard level, between sample additions, ａnd between reagent additions. Also, use separate reservoirs for each reagent.
— When using an automated plate washer, adding a 30 second soak period following the addition of wash buffer, and/or rotating the plate 180 degrees between wash steps may improve assay precision.
— To ensure accurate results, proper adhesion of plate sealers during incubation steps is necessary.
— Substrate Solution should remain colorless or light blue until added to the plate. Keep Substrate Solution protected from light. Substrate Solution should change from colorless or light blue to gradations of blue.
— Stop Solution should be added to the plate in the same order as the Substrate Solution. The color developed in the wells will turn from blue to yellow upon addition of the Stop Solution. Wells that are green in color indicate that the Stop Solution has not mixed thoroughly with the Substrate Solution.
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RJ518050旋轉(zhuǎn)關(guān)節(jié)--K型接頭 單路同軸旋轉(zhuǎn)關(guān)節(jié)
RJ518050旋轉(zhuǎn)關(guān)節(jié)產(chǎn)品特征：
技術(shù)參數(shù)：| Specifications | |||
| Interface Type | 2.92 Female ( 50 ohms ) | Style | I Type |
| Frequency Range | DC to 40 GHz | Phase WOW (Degrees Max.) | 1° |
| VSWR, Max. | 1.30 @ DC to 10 GHz | Insertion Loss, ,Max. | 0.25 dB @ DC to 10 GHz |
| 1.45 @ 10 to 20 GHz | 0.40 dB @ 10 to 20 GHz | ||
| 1.60 @ 20 to 30 GHz | 0.55 dB @ 20 to 30 GHz | ||
| 1.75 @ 30 to 40 GHz | 0.70 dB @ 30 to 40 GHz | ||
| VSWR WOW | 0.1 | Insertion Loss WOW | 0.02 dB |
| Peak Power, Max. | 500 W | Average Power, Max. | 60 W @ 1 GHz |
| Rotating Speed, Max. | 250 rpm | Life Time, Min. | 5 Million Revolutions |
| Starting Torque | 3.5 Ncm. | Continuous Rotational Torque | 3.5 Ncm Max. |
| Axial Load On Interface, Max | ± 1 N | Radial Load On Interface, Max. | ± 1 N |
| Body Material | Stainless Steel | Contact Pin Material | Beryllium Copper |
| DC Power Ability | 3 A * 24V @ Full RF Power | Contact Surface Finish | Gold Plate |
| Weight | 0.014 kg | Marking | Adhesive Label |
| Insulator Material | PTFE / Teflon | IP Protection Level | IP 64 Per EN 60529 |
| Temperature(Ambient Range) | -40 to +60 °C (Operation) | Humidity | 85% (Operation) |
| -50 to +70 °C (Storage) | (Non-Condensing), Max. | 95% (Storage) | |
KEM自動滴定儀AT-710系列
KEM自動滴定儀AT-710系列KEM自動滴定儀AT-710系列主要特點:AT-710M:觸摸屏和操作單元之間無線連接，同時控制四臺自動滴定測量單元。通過使用無線適配器(藍牙)，操作單元和滴定裝置可以不用電纜連接。在測量樣品過程中有危害性氣體時，可將滴定裝置放置在排煙柜中，由無線傳輸?shù)牟僮鲉卧獔?zhí)行滴定。AT-710M/AT-710S:滴定劑的信息存儲在滴定管上的芯片中。即使滴定管單元轉(zhuǎn)移到另一個滴定裝置,也不需要重新輸入滴定劑信息。AT-710M/AT-710S/AT-710B:滴定管單元特殊的開關(guān)閥門。減少滴定管和開關(guān)閥門間的死體積。特殊結(jié)構(gòu)的設(shè)計可減少滴定劑的使用量和快速更換滴定單元。AT-710M/AT-710S/AT-710B:智能化電極電纜。電極的信息可透過電纜上傳感器存儲相關(guān)資料。電極校準的數(shù)據(jù)可應用到不同的自動滴定儀上。KEM自動滴定儀AT-710系列技術(shù)參數(shù):
名稱 | 自動電位滴定儀 | ||
儀器型號 | AT-710M | AT-710S | AT-710B |
儀器組成 | MCU-710M+AT-710+螺旋槳或磁力攪拌器 | MCU-710S+AT-710+螺旋槳或磁力攪拌器 | AT-710+螺旋槳或磁力攪拌器 |
測量范圍 | 1)電位: -2000.0～2000.0mV2) pH: -20.000～20.000pH3)溫度: 0～100°C | ||
滴定方式 | 自動滴定，自動間歇滴定，間歇滴定，恒pH滴定 | ||
石油中和值滴定，COD滴定 | |||
滴定類型 | 電位滴定(酸堿，氧化還原，沉淀)，光度滴定，極化滴定，電導滴定 | ||
終點判斷 | 全量滴定(自動終點)，自動終點滴定，設(shè)定終點滴定 | ||
交叉點滴定，自動終點/設(shè)定終點滴定 | |||
特殊應用 | 量電極電位(pH, mV)，酸解離常數(shù)(pKa) | ||
同時記錄雙通道電位，學習滴定 | |||
輸入設(shè)置 | 觸摸屏輸入 | 按鍵輸入 | |
顯示 | 1) 8.4英寸彩色液晶屏，800x600點 | 1) LED背景光源液晶屏 | |
2)英文/日文/中文/韓文/俄文/西語/德語/法語 | 2)英文/日文/中文/韓文/俄文/西語 | ||
3)四個通道同時顯示 | 3)一個通道顯示 | 3)一個通道顯示 | |
計算 | 濃度計算，統(tǒng)計計算(平均值，標準差，相對標準差)，自動輸入空白和滴定度 | ||
數(shù)據(jù)儲存 | 500組樣品結(jié)果 | 50組樣品結(jié)果 | |
GLP認證 | 登記操作者/使用群組管理滴定劑:提示滴定度測量日期/指示滴定劑剩余量/提示滴定管活塞更換日期/提示滴定劑換日期/滴定度測量履歷性能檢查:提醒計劃檢查日期/記錄檢查結(jié)果電極管理:記錄校正日期/記錄校正履歷/電極檢查/電極檢查履歷滴定管驗證:驗證/記錄驗證結(jié)果時間管理:顯示操作時間 | 登記操作者/記錄檢查結(jié)果/電極校正記錄/滴定管精度確認/時間管理 | |
滴定管單元 | 20mL玻璃滴定管附褐色保護套(標配)，選配: 10mL，5mL或1mL | ||
滴定管精確度 | 50mL滴定管(自動注入器): ±0.5mL20mL滴定管: 0.02mL 重復性: 0.01mL10mL滴定管: 0.015mL 重復性: 0.005mL5mL滴定管: 0.01mL 重復性: 0.003mL1mL滴定管: 0.005mL 重復性: 0.001mL | ||
擴大器 | 1) STD: pH(mV), mV，雙通道(標配)2) PTA: pH(mV), mV，光度,三通道3) POA: pH(mV), mV，極化,三通道4) CMT: pH(mV), mV，電導,三通道5) TET: pH(mV)，pH(mv), mV，三通道 | ||
外部輸出 | RS-232C x3 | RS-232C x 2 | |
打印機，電子天平，數(shù)據(jù)軟件(SOFT-CAP) | |||
USB x; 1 | USB x 1 | ||
U盤，熱敏打印機，A4打印機，鍵盤， 條碼機，腳踏開關(guān), USB集線器 | U盤，熱敏打印機，鍵盤，條碼機，腳踏開關(guān), USB集線器，安卓設(shè)備 | ||
LAN x 1 :電腦(PC) | |||
擴充功能 | 測量單元:電位滴定儀(AT-710)容量水分儀(MKV-710)庫侖水分儀MKC-710)最多四臺測量單元 | ||
自動活塞滴定管:最多可控制10臺滴定管驅(qū)動單元(包括主機兩臺) | |||
多樣品自動進樣器: CHA-600，CHA-700 | CHA-700 | ||
使用環(huán)境 | 1)溫度: 5～35°C2)相對濕度: 85%RH以下 | ||
電源 | AC100～240V，50Hz/60Hz | ||
耗電量 | 主機:約30瓦打印機:約7瓦 | 主機:約20瓦打印機:約7瓦 | |
尺寸 | 觸摸屏: 225(W) x 190(D) x 42(H)mm | ||
滴定單元: 141(W) x 296(D) x 367(H)mm(不包括管路)打印機: 106(W) x 180(D) x 88(H)mm | |||
重量 | 觸摸屏:約1.5公斤 | ||
滴定單元:約4.0公斤打印機:約0.4公斤 | |||
BQS2KWBQS2KW排污排沙潛水泵
BQS2KW排污排沙潛水泵
產(chǎn)品介紹 BQS（W）礦用隔爆型排污排沙潛水電泵，是泵和電動機組合一體的電力排灌設(shè)備，外型美觀，結(jié)構(gòu)簡單，密封性能好，性能穩(wěn)定，壽命長，安裝使用方便，且可以長期在水下連續(xù)作業(yè)，被廣泛用于煤礦立井、斜井及井底散煤泥地自動化排水。內(nèi)裝式電泵，水由電動機夾層中流過，有效的延長了電泵的使用壽命；外裝式電泵，葉輪采用雙流道大過流結(jié)構(gòu)，運行平穩(wěn)，排污能力強，防纏繞，無堵塞現(xiàn)象，并且有體積小，重量輕，攜帶方便的特點。結(jié)構(gòu)特點 BQS（W）系列的礦用隔爆型排污排沙潛水電泵嚴格根據(jù)煤炭行業(yè)標準MT/T671-2005《煤礦用隔爆型潛水電泵》、中華人名共和國國家執(zhí)行標準GB3836-2000《爆炸性氣體環(huán)境用電氣設(shè)備》設(shè)計制作，電動機采用Y型干式隔爆型三相異步電動機，具有啟動轉(zhuǎn)矩大、運行性能好、噪聲低、體積小、重量輕、維護方便等特點，以及優(yōu)良的隔爆結(jié)構(gòu)性能和較高的防護等級，適用于含有甲烷或煤塵等爆炸性氣體環(huán)境、有爆炸危險的礦井下采掘面及巷道等場所與水泵配套使用。電泵采用O形橡膠密封圈作為靜密封，結(jié)構(gòu)性能好，采用橡膠硫化曲線控制技術(shù)保障了O型圈耐潮防老化的質(zhì)量及密封性能。動密封采用兩套機械密封，并有油室隔離保護，有效地為轉(zhuǎn)動摩擦副提供潤滑，形成流體膜潤滑保護，同時釋放在運動過程中積聚的熱量，從而延長了機械密封的使用壽命，確保了密封性能。電泵的流體部件材質(zhì)采用耐磨合金鑄鐵，水泵部分采用流體機械設(shè)計及平衡技術(shù)，有效的延長了電泵的使用壽命。用途含有甲烷或煤塵爆炸危險的煤礦井下采掘工作面排水，煤礦立井、斜井施工排水，礦井無水倉井底主排水，主井井底散煤倉自動排水，老塘、無人區(qū)涌水自動排水，煤礦井下含有煤塵、泥沙等較小固體顆粒的地下水排放，清水倉排水，救災搶險排水，城市環(huán)境系統(tǒng)中污水排放處理使用條件輸送介質(zhì)溫度應不超過40℃，含固體顆粒的介質(zhì)、其體積濃度一般不超過2%，輸送介質(zhì)pH值在4~10范圍內(nèi)，工作環(huán)境溫度0~40℃，水泵潛入水深值不超過5m，介質(zhì)中固體最大粒直徑不大于水泵流道過流斷面最小尺寸的50%基本參數(shù)
| 型號 | 流量 m3/h | 楊程 m | 功率 kW | 電壓 V | 電流 A | 額定 轉(zhuǎn)速 r/min | 電泵 效率 % | 通過顆粒最大直徑 mm |
| 15-15-2.2 | 15 | 15 | 2.2 | 380或660或1140 | 5.12或2.98 | 3000 | 33.3 | 10 |
| 25-10-2.2 | 25 | 10 | 34.5 |
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CKB200系列CKB型單向楔塊超越離合器
CKB型（B200型）單向楔塊超越離合器
CKB無內(nèi)環(huán)的單向楔塊型超越離合器基本參數(shù)和主要尺寸 長度單位：mm
安裝參考范例（Mounting e×ample）
KDLU渦街流量計
KDLU渦街流量計由儀華測控生產(chǎn)，質(zhì)量可靠，售后有保障。聯(lián)系人：吳先生；聯(lián)系電話：傳真，QQ908805187本文來源<p><strong><a >壓力變送器</a></strong></p>，http://www.yhck88.com/，<p><strong><a >壓力變送器，<p><strong><a >壓力變送器</a></strong></p>產(chǎn)品名稱：KDLU渦街流量計產(chǎn)品價格：根據(jù)型號的不同而異型號規(guī)格：可根據(jù)用戶非標定制產(chǎn)品類別：流量計公司簡介：儀華測控儀表有限公司主要生產(chǎn)各種型號的壓力變送器、壓力傳感器、物位計、料位計、磁翻板物位計、溫度儀表、壓力儀表、物位儀表、控制開關(guān)、電熱帶配件等產(chǎn)品。是歷史三十多年的儀表儀器行業(yè)中的大型企業(yè)，被國家列入大型一檔企業(yè)，并被例入中國電力企業(yè)家協(xié)會火電分會成員，化工產(chǎn)業(yè)定點企業(yè)。被化工部、機電部、冶金工業(yè)部推薦為質(zhì)量信得過產(chǎn)品企業(yè)。由于儀華的誠信和努力，長期來在供求雙方之間保持著很高的信譽和良好的溝通渠道。企業(yè)連續(xù)多年被有關(guān)部門評為“重合同，守信用”單位。產(chǎn)品說明渦街流量計是綜合吸收發(fā)達國家先進技術(shù)和總結(jié)多年研究生產(chǎn)經(jīng)驗的基礎(chǔ)上進行精心設(shè)計的產(chǎn)品，實現(xiàn)了產(chǎn)品智能化、標準化、系列化、通用化、生產(chǎn)模具化、確保產(chǎn)品質(zhì)量的美觀性。該產(chǎn)品具有電路先進、功耗微低、量程比寬、結(jié)構(gòu)簡單、阻力損失小、堅固耐用、用途廣、使用壽命長、工作穩(wěn)定、便于安裝調(diào)試等特點。1.無可動部件，運行可靠，性能較好，使用壽命長。 2.測量被測流體，不直接接觸傳感器，性能穩(wěn)定。 3.輸出信號是與流量成正比的脈沖信號或輸出4~20mA標準電流信號。 5.測量量程比大，可達1：10。而差壓式只有1：3。 6.結(jié)構(gòu)簡單而牢固，安裝方便，維修費用極少。 KDLU渦街流量計工作原理: 在測量管中垂直插入一個柱狀物時，流體通過柱狀物兩側(cè)就交替地產(chǎn)生有規(guī)則的旋渦（如圖所示），這種旋渦列被稱為卡門渦街。卡門渦街的釋放頻率與流體的流動速度及柱狀物的寬度有關(guān)，可用下式表示： f =St·v/d f-卡門渦街的釋放頻率 式中 :St-系數(shù)（稱為斯特羅哈數(shù)） v-流速 d-柱狀物的寬度 KDLU渦街流量計參數(shù)及要求1、測量介質(zhì)： 氣體、液體、蒸氣 2、連接方式：法蘭卡裝式、法蘭式、插入式 3、口徑規(guī)格： 法蘭卡裝式口徑選擇 25,32,50,80,10 4、法蘭連接式口徑選擇 ：100,150,200 KDLU渦街流量計流量測量范圍 ：正常測量流速范圍（雷諾數(shù)1.5×104～4×106；氣體5～50m/s; 液體0.5～7m/s） 測量精度：1.0級 1.5級 被測介質(zhì)溫度:常溫–25℃～100℃，高溫–25℃～150℃ -25℃～250℃ KDLU渦街流量計產(chǎn)品工作原理： 在流體中設(shè)置三角柱型旋渦發(fā)生體，則從旋渦發(fā)生體兩側(cè)交替地產(chǎn)生有規(guī)則的旋渦，這種旋渦稱為卡門旋渦，如右圖所示，旋渦列在旋渦發(fā)生體下游非對稱地排列。 渦街流量計是根據(jù)卡門（Karman）渦街原理測量氣體、蒸汽或液體的體積流量、標況的體積流量或質(zhì)量流量的體積流量計。并可作為流量變送器應用于自動化控制系統(tǒng)中。 渦街流量計是應用流體振蕩原理來測量流量的，流體在管道中經(jīng)過渦街流量變送器時，在三角柱的旋渦發(fā)生體后上下交替產(chǎn)生正比于流速的兩列旋渦，旋渦的釋放頻率與流過旋渦發(fā)生體的流體平均速度及旋渦發(fā)生體特征寬度有關(guān)，可用下式表示：f=Stv/d 式中:f為旋渦的釋放頻率，Hz；v為流過旋渦發(fā)生體的流體平均速度，m/s；d為旋渦發(fā)生體特征寬度，m；St為斯特羅哈數(shù)，無量綱，它的數(shù)值范圍為0.14－0.27。t是雷諾數(shù)的函數(shù)，St=f（l/Re）。當雷諾數(shù)Re在102~105范圍內(nèi)，St值約為0.2，因此，在測量中，要盡量滿足流體的雷諾數(shù)在102~105，旋渦頻率f=0.2v/d。由此可知，通過測量旋渦頻率就可以計算出流過旋渦發(fā)生體的流體平均速度v，再由式q=vA可以求出流量q，其中A為流體流過旋渦發(fā)生體的截面積。功能1、表體中同時集成溫壓補償補償功能，可測量流體的標準體積流量或標準質(zhì)量流量2、全智能化、數(shù)字化電路設(shè)計，可自動補償被測流體密度或標況體積計算。 3、 全新的數(shù)字濾波和修正功能使流量測量更加精準可靠。 4、 電池供電型無需外接電源既可連續(xù)工作兩年以上。 5、 全新點陣漢字液晶顯示，使用操作更方便。
ZKG-YN磁粉制動器
NKJ41真空隔離截止閥
NKJ41真空隔離截止閥
產(chǎn)品用途
真空隔離截止閥適用于公稱壓力PN4.0～10.0Mpa，工作溫度≤200℃的火力電站回水冷凝系統(tǒng)管道上，切斷或接通中的介質(zhì)。適用介質(zhì)為：水、蒸汽等。
產(chǎn)品結(jié)構(gòu)特點
1.產(chǎn)品按JB/T3595標準設(shè)計制造，滿足電站設(shè)備配套使用要求。
2.設(shè)計了真空密封結(jié)構(gòu)填料室，隔離真空。
3.閥桿經(jīng)調(diào)質(zhì)及表面氮化處理，有良好的抗腐蝕性，抗擦傷和耐磨性。
4.法蘭墊片采用復合材料，膨脹系數(shù)大，氣密性能好，系統(tǒng)與大氣隔離。
5.倒密封采用不銹鋼螺紋連接密封座或本體堆焊奧氏體不銹鋼而成，倒密封。填料更換和維修可在不停機情況下進行，方便快捷不影響系統(tǒng)運行。
主要零件的材料說明
| 閥 體 | 25、WCB | Cr5Mo |
| 閥 蓋 | 25、WCB | Cr5Mo |
| 支 架 | 25、WCB | Cr5Mo |
| 閥 瓣 | 2Cr13、WCB | Cr5Mo |
| 閥 桿 | 2Cr13 | 38CrMoAL、25Cr2MoV |
| 閥 座 | 25、304 | 304 |
| 密封環(huán) | 膨脹柔性石墨 | |
| 填 料 | 膨脹柔性石墨 | |
| 閥桿螺母 | ZCuA110Fe3 | |
KVH-C100電子羅盤KVH-C100電子羅盤儀數(shù)字羅盤
技術(shù)參數(shù):
| 主版尺寸 | 4.6cm×7.1cm×2.8cm |
| 重量 | 64g（主板） |
| 輸入電壓 | +8-18VDC 或+18-28VDC（用戶可選） |
| 電流 | 最大40mA |
| 鋁外殼封裝 | 8.0cm × 7.5cm × 5.7cm |
| 重量 | 400g（整機） |
| 精度 | ±0.5°（±10mils） |
| 可重復性 | ±0.2°（±5mils） |
| 分辨率 | ±0.1°（1mil） |
| 傾斜 | ±16°（SE－25） ±45°（SE－10不帶殼） |
| 響應時間 | 0.1 -24秒可調(diào) |
| 操作溫度 | －40℃-+65℃ |
| 存貯溫度 | －51℃-+71℃ |
| 沖擊／振動 | 符合美MIL－STD－810 |
| 標準平均無故障時間 | 大于30000小時 |
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