ET 200KLEIN TOOLS電子式電壓/導(dǎo)通測(cè)試儀
•Solid state design is safer than solenoid testers.•Low impedance to reduce false readings.•Indicates voltage without battery.•Voltage indicated by lights, vibration ａnd tone.•With continuity beeper ａnd bright work light. •固態(tài)設(shè)計(jì)，比電磁測(cè)試儀安全。•低阻抗，以減少錯(cuò)誤的讀數(shù)。•指示，不帶電池的電壓。•電壓表示燈，振動(dòng)和音。•連續(xù)性蜂鳴器和明亮的工作燈。
PT壓力變送器（pressure sensor）
ministat 125-1小反應(yīng)釜水浴
Inspector Alert α、β、γ和X射線檢測(cè)儀
儀器介紹
◆采用一只蓋革-彌勒計(jì)數(shù)管來(lái)測(cè)定α、β、γ和X射線輻射 ◆“安全第一”（Safety First）的校準(zhǔn)功能能夠避免校準(zhǔn)人員的輻射接觸 ◆檢測(cè)儀符合歐洲CE認(rèn)證要求
主要特點(diǎn)
◆內(nèi)置鹵素淬滅劑GM探測(cè)器，對(duì)α、β射線源的靈敏度很高 ◆四位液晶顯示，可選擇mR/hr、CPM、mSv/hr、CPS或Total/Timer等單位 ◆總計(jì)數(shù)/定時(shí)器功能對(duì)輕微污染進(jìn)行定時(shí)的精確檢測(cè)，定時(shí)時(shí)間可選擇1分鐘－－ 24小時(shí)
技術(shù)參數(shù)
◆測(cè)量范圍：mR/hr(毫倫/小時(shí))：0.001—110.0，CPM（每分鐘計(jì)數(shù)）：0—300,000 μSv/hr(微希伏/小時(shí))：0.01—1,100，CPS（每秒鐘計(jì)數(shù)）：0—5,000，總計(jì)數(shù)： 1—9,999,000 ◆效 率：Sr-90(546kev,2.3MeV βmax)約75% C-14(156kev βmax)約11% Bi-210(1.2MeV βmax)約64% Am-241(5.5MeV α)約36% ◆靈 敏 度：3500CPM/ mR/hr（對(duì)于Cs-137） ◆精 度：±15% ◆溫度范圍：-10℃－－-+50℃ ◆電 源：1節(jié)9V堿性電池，電池壽命 200小時(shí)◆尺寸重量：150×80×30mm 350克（含電池）
應(yīng)用領(lǐng)域
◆探測(cè)和測(cè)定表面沾污◆在操作放射性核素時(shí)監(jiān)測(cè)可能存在的放射性暴露量◆調(diào)查環(huán)境污染◆測(cè)定惰性氣體及其它低能放射性核素◆建筑裝飾材料放射測(cè)定 射線危害：低劑量的放射性射線輻射（天然背景輻射的變化范圍），對(duì)人體無(wú)害或風(fēng)險(xiǎn)甚低，但達(dá)到一定劑量則會(huì)對(duì)人體有害，可引起癌癥、白內(nèi)障、不孕癥、突變、萎縮效應(yīng)、壽命減短,甚至死亡
應(yīng)用：
偵測(cè)放射性射線，以采取相應(yīng)防護(hù)措施。海關(guān)和邊境巡邏，政府執(zhí)法部門，檢疫檢驗(yàn)，應(yīng)急事故處理，核電廠、銀行、政府、實(shí)驗(yàn)室等部門安全巡查，醫(yī)學(xué)廢料處理，消防隊(duì)，采礦業(yè)，科學(xué)實(shí)驗(yàn)，個(gè)人保護(hù)，連續(xù)監(jiān)測(cè)
參考信息（來(lái)自中國(guó)輻射防護(hù)研究院）
居民的劑量限值為每年1mSv。即0.114μSv/hr。
放射性職業(yè)人員劑量限值為每年20mSv，但任何一年不能超過(guò)50mSv。
ND-2100A型供應(yīng)北京ND-2100A型中文液晶實(shí)驗(yàn)室硅酸根表
| 圖形液晶，全中文顯示 ·功能眾多，菜單操作 ·內(nèi)置實(shí)時(shí)時(shí)鐘，為存儲(chǔ)、標(biāo)定 ·和記事等提供時(shí)間基準(zhǔn) ·內(nèi)置大容量存儲(chǔ)器，隨時(shí)存儲(chǔ) ·自動(dòng)測(cè)量/手動(dòng)輸入溫度 ·特有的純水，加氨超純水25℃折算 ·超純水自動(dòng)溫度補(bǔ)償 ·微處理器智能化設(shè)計(jì) | ·可手動(dòng)輸入零點(diǎn)、斜率 ·沒(méi)有可調(diào)器件、旋紐和波段開 ·關(guān)，更加穩(wěn)定。 ·外殼采用增強(qiáng)ABS ·防水、防濕氣侵蝕，堅(jiān)固耐用。 ·線路板與表殼沒(méi)有任何連線 ·選配打印機(jī)T-LAB通訊及數(shù)據(jù)處理軟件 ·在微機(jī)上進(jìn)行連續(xù)記錄和后期處理 |
WNZ-500微機(jī)控制扭轉(zhuǎn)試驗(yàn)機(jī)500N.m
AN218004DWDM光譜分析儀AN218004 [1526.05—1563.86 nm] SC/PC
| 技術(shù)參數(shù) | |||
| 通道數(shù)量 | 96 | 通道間隔 | 50GHz, 100GHz |
| 通道頻率 | 196.45~191.7THz | 最大輸入功率 | 500mW; 27dBm |
| 帶寬 | 1526.05~1563.86 nm | 光源接頭 | SC/PC Standard |
| 測(cè)量速度 | 4 Sec. (all 96ch.) | 電池 | 鋰聚合物電池, 1800毫安時(shí)，3.7伏 |
| 測(cè)量范圍 | +10~-40dBm | 電池工作時(shí)長(zhǎng) | 充滿電后單次使用620分鐘 |
| 測(cè)量精度 | ± 1.0dB @ -40 dBm | 電流消耗(Max) | 0.25A |
| 顯示屏分辨率 | 0.01dB | 電力消耗 | 0.925W |
| 顯示單位 | dB, dBm,nm,THz | 顯示 | 3.5” TFT-LCD, 16bit color, 240*320 |
| 重量 | 0.6 kg | 尺寸 | 196*95*40 mm |
| 溫度 (環(huán)境條件) | -20 to +55 °C (操作環(huán)境) | 濕度 (最大無(wú)冷凝) | 95% (操作環(huán)境) |
| -35 to +65°C (儲(chǔ)存環(huán)境) | 85% (儲(chǔ)存環(huán)境) | ||
電桿荷載位移測(cè)試儀專用拉力傳感器LH-N
1.拉式荷重傳感器。采用了箔式應(yīng)變片貼在合金鋼彈性體上，可用于拉、壓力值的測(cè)量，具有精度高、長(zhǎng)期穩(wěn)定性好、密封性好、輸出對(duì)稱性好，抗偏載能力強(qiáng)。適用于各種電桿、排水管、管樁力學(xué)性能檢測(cè)。
2.量程：5\\\\10\\\\15\\\\20\\\\30\\\\50T 、100\\\\150\\\\200300\\\\500T
3.綜合精度：0.05 %
4.靈敏度：2 ±0.1 mV /V
5.蠕變：±0.1％F·S/30min
6.非線性：±0.1%F·S
7.滯后誤差：±0.1%F·S
8.重復(fù)性誤差：±0.1%F·S
9.零點(diǎn)溫度系數(shù)：±0.1%F·S/10℃
10.輸出溫度系數(shù)：±0.1%F·S/10℃
11.輸入阻抗：350±15Ω
12.輸出阻抗：350±15Ω
13.絕緣電阻：≥5000 MΩ
14.供橋電壓建議：10 VDC
15.工作溫度范圍： -20 - +70℃
16.允許過(guò)負(fù)荷： 150%F·S
17.密封等級(jí)： IP67
18.材質(zhì)： 合金鋼
RI41德國(guó)hengstler編碼器
這款編碼器原產(chǎn)地德國(guó)，為了更好服務(wù)中國(guó)廣大客戶的需要，在天津設(shè)立了生產(chǎn)基地，德國(guó)hengstler歷史，品種多，采用進(jìn)的技術(shù)和的設(shè)計(jì)方案，了高質(zhì)量和性。
CSB-E04493h人血管緊張素Ⅱ(ANG-Ⅱ)ELISA Kit
1Human Angiotensin Ⅱ（ANG-Ⅱ）ELISA KitCatalog No. CSB-E04493h（96T） This immunoassay kit allows for the in vitro quantitative determination of humanANG-Ⅱ concentrations in serum, plasma. Expiration date six months from the date of manufacture FOR RESEARCH USE ONLY. NOT FOR USE IN DIAGNOSTIC PROCEDURES.2PRINCIPLE OF THE ASSAYThe microtiter plate provided in this kit has been pre-coated with anantibody specific to ANG-Ⅱ. Standards or samples are then added to theappropriate microtiter plate wells with a biotin-conjugated polyclonalantibody preparation specific for ANG-Ⅱ ａnd Avidin conjugated toHorseradish Peroxidase （HRP） is added to each microplate well andincubated. Then a TMB （3,3＇,5,5＇ tetramethyl-benzidine） substrate solutionis added to each well. Only those wells that contain ANG-Ⅱ,biotin-conjugated antibody ａnd enzyme-conjugated Avidin will exhibit achange in color. The enzyme-substrate reaction is terminated by theaddition of a sulphuric acid solution ａnd the color change is measuredspectrophotometrically at a wavelength of 450 nm ± 2 nm. Theconcentration of ANG-Ⅱ in the samples is then determined by comparingthe O.D. of the samples to the standard curve.DETECTION RANGE0.62ng/ml-40ng/ml. The standard curve concentrations used for the ELISA’swere40ng/ml, 20ng/ml, 10 ng/ml,5 ng/ml, 2.5 ng/ml, 1.25ng/ml,0.62 ng/ml.SPECIFICITYThis assay recognizes human ANG-Ⅱ. No significant cross-reactivity orinterference was observed.SENSITIVITYThe minimum detectable dose of human ANG-Ⅱ is typically less than0.16ng/ml.The sensitivity of this assay, or Lower Limit of Detection （LLD） was definedas the lowest protein concentration that could be differentiated from zero.3MATERIALS PROVIDEDReagent QuantityAssay plate 1Standard 2Sample Diluent 1 x 20 mlBiotin-antibody Diluent 1 x 10 mlHRP-avidin Diluent 1 x 10 mlBiotin-antibody 1 x 120μlHRP-avidin 1 x 120μlWash Buffer1 x 20 ml（25×concentrate）TMB Substrate 1 x 10 mlStop Solution 1 x 10 mlSTORAGE1. Unopened test kits should be stored at 2-8C upon receipt ａnd themicrotiter plate should be kept in a sealed bag. The test kit may be usedthroughout the expiration date of the kit, provided it is stored asprescribed above. Refer to the package label for the expiration date.2. Opened test plate should be stored at 2-8C in the aluminum foil bagwith desiccants to minimize exposure to damp air. The kits will remainstable until the expiring date shown, provided it is stored as prescribedabove.3. A microtiter plate reader with a bandwidth of 10 nm or less ａnd anoptical density range of 0-3 OD or greater at 450nm wavelength isacceptable for use in absorbance measurement.4REAGENT PREPARATIONBring all reagents to room temperature before use.1. Wash Buffer If crystals have formed in the concentrate, warm up toroom temperature ａnd mix gently until the crystals have completelydissolved. Dilute 20 ml of Wash Buffer Concentrate into deionized ordistilled 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. Thisreconstitution produces a stock solution of 40 ng/ml. Allow the standardto sit for a minimum of 15 minutes with gentle agitation prior to makingserial dilutions. The undiluted standard serves as the high standard （40ng/ml）. The Sample Diluent serves as the zero standard （0 ng/ml）.Prepare fresh for each assay. Use within 4 hours ａnd discard after use.3. Biotin-antibody Centrifuge the vial before opening. Dilute to theworking concentration using Biotin-antibody Diluent（1:100）,respectively.4. HRP-avidin Centrifuge the vial before opening. Dilute to the workingconcentration using HRP-avidin Diluent（1:100）, respectively.Precaution: The Stop Solution provided with this kit is an acid solution. Weareye, hand, face, ａnd clothing protection when using this material.OTHER SUPPLIES REQUIRED Microplate reader capable of measuring absorbance at 450 nm, withthe 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.5 An incubator which can provide stable incubation conditions up to37°C±0.5°C.SAMPLE COLLECTION AND STORAGE Serum Use a serum separator tube （SST） ａnd allow samples to clotfor 30 minutes before centrifugation for 15 minutes at 1000 g. Removeserum ａnd assay immediately or aliquot ａnd store samples at -20°C.Centrifuge the sample again after thawing before the assay. Avoidrepeated freeze-thaw cycles. Plasma Collect plasma using citrate, EDTA, or heparin as ananticoagulant. Centrifuge for 15 minutes at 1000 g within 30 minutes ofcollection. Assay immediately or aliquot ａnd store samples at -20°C.Centrifuge the sample again after thawing before the assay. Avoidrepeated freeze-thaw cycles.Note: Grossly hemolyzed samples are not suitable for use in this assay.ASSAY PROCEDUREBring all reagents ａnd samples to room temperature before use. It isrecommended that all samples, standards, ａnd controls be assayed in duplicate.All the reagents should be added directly to the liquid level in the well. Thepipette should avoid contacting the inner wall of the well.1. Add 100μl of Standard, Blank, or Sample per well. Cover with theadhesive 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. Incubatefor 1 hour at 37°C. Biotin-antibody working solution may appearcloudy. Warm up to room temperature ａnd mix gently until solutionappears uniform.64. Aspirate each well ａnd wash, repeating the process three times for atotal of three washes. Wash: Fill each well with Wash Buffer （200μl） andlet it stand for 2 minutes, then remove the liquid by flicking the plateover a sink. The remaining drops are removed by patting the plate on apaper towel. Complete removal of liquid at each step is essential togood performance.5. Add 100μl of HRP-avidin working solution to each well. Cover themicrotiter plate with a new adhesive strip. Incubate for 1 hour at 37°C.6. Repeat the aspiration ａnd wash three times as step 4.7. Add 90μl of TMB Substrate to each well. Incubate for 10-30 minutes at37°C. Keeping the plate away from drafts ａnd other temperaturefluctuations in the dark.8. Add 50μl of Stop Solution to each well when the first four wellscontaining the highest concentration of standards develop obvious bluecolor. If color change does not appear uniform, gently tap the plate toensure thorough mixing.9. Determine the optical density of each well within 30 minutes, using amicroplate reader set to 450 nm.CALCULATION OF RESULTSUsing the professional soft "Curve Exert 1.3" to make a standard curve isrecommended, which can be downloaded from our web.Average the duplicate readings for each standard, control, ａnd sample andsubtract the average zero standard optical density. Create a standard curveby reducing the data using computer software capable of generating a fourparameter logistic （4-PL） curve-fit. As an alternative, construct a standardcurve by plotting the mean absorbance for each standard on the x-axisagainst the concentration on the y-axis ａnd draw a best fit curve through the7points on the graph. The data may be linearized by plotting the log of theANG-Ⅱ concentrations versus the log of the O.D. ａnd the best fit line canbe determined by regression analysis. This procedure will produce anadequate but less precise fit of the data. If samples have been diluted, theconcentration read from the standard curve must be multiplied by thedilution 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 curvebe consistent with the samples being assayed. If samples generate values higher than the highest standard, dilute thesamples 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 cancause variation in binding. This assay is designed to eliminate interference by soluble receptors,binding proteins, ａnd other factors present in biological samples. Untilall factors have been tested in the Immunoassay, the possibility ofinterference 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 ofeach standard level, between sample additions, ａnd between reagentadditions. Also, use separate reservoirs for each reagent.8 When using an automated plate washer, adding a 30 second soakperiod following the addition of wash buffer, and/or rotating the plate180 degrees between wash steps may improve assay precision. To ensure accurate results, proper adhesion of plate sealers duringincubation steps is necessary. Substrate Solution should remain colorless or light blue until added tothe plate. Keep Substrate Solution protected from light. SubstrateSolution should change from colorless or light blue to gradations ofblue. Stop Solution should be added to the plate in the same order as theSubstrate Solution. The color developed in the wells will turn from blueto yellow upon addition of the Stop Solution. Wells that are green incolor indicate that the Stop Solution has not mixed thoroughly with theSubstrate Solution.
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