M109-RM| M109-SM超聲波測(cè)厚探頭
公司名稱：深圳華清儀器儀表有限公司
公司電話：、
公司傳真：0755－
專線電話：
Q Q :
公司地址：深圳市龍華新區(qū)三聯(lián)路清泉二期15A2
公司網(wǎng)址:http://www.huaqing17.cn
Olympus NDT offers a complete selection of transducers, cables, couplants, calibration test blocks, and accessories to meet a wide variety of ultrasonic precision thickness gaging applications.
奧林巴斯NDT提供一個(gè)完整的選擇傳感器，電纜，耦合劑，校準(zhǔn)試塊和配件，以滿足各種各樣的超聲波高精度厚度測(cè)量的應(yīng)用。
接觸式探頭
The Panametrics-NDT Microscan transducers are frequently used with the Series 25 and Series 35 thickness gages, as well as other commercially available thickness gages, flaw detectors and ultrasonic instrumentation.
Microscan transducer part numbers reflect the connector designation:
RM = Right Angle Microdot®
SM = Straight Microdot
RB = Right Angle BNC
SB = Straight BNC
SU = Straight UHF
When selecting a transducer, please review the chart below or consult the Transducer Frequency Range in the Instruction Manual that was shipped with your gage.
Thickness Gage ModelTransducer Frequency Range 45MG
38DL PLUS
35, 35DL
25, 25DL
25DL PLUS
25MULTI PLUS
2.0 to 30 MHz 35HP, 35DL-HP
25HP PLUS
25HPV
0.5 to 5.0 MHz
Panametrics-NDT Microscan換能器是經(jīng)常使用的25系列和35系列測(cè)厚儀，以及其他市售的測(cè)厚儀，探傷和超聲波儀器。
Microscan transducer part numbers reflect the connector designation:
微傳感器部分的數(shù)字反映的連接器設(shè)計(jì)：
RM = Right Angle Microdot®
RM =直角微點(diǎn)®
SM = Straight Microdot
SM =直微粒
RB = Right Angle BNC
Rb =直角插頭
SB = Straight BNC
某人直BNC
SU = Straight UHF
SU =直超高頻
When selecting a transducer, please review the chart below or consult the Transducer Frequency Range in the Instruction Manual that was shipped with your gage.
當(dāng)選擇一個(gè)傳感器，請(qǐng)檢查下面的圖表或咨詢的換能器的頻率范圍內(nèi)的指導(dǎo)手冊(cè)，是隨你的計(jì)。
Thickness Gage ModelTransducer Frequency Range 45MG
厚度計(jì)modeltransducer頻率范圍45mg
38DL PLUS
38dl加
35, 35DL
35，35DL
25, 25DL
25，25dl
25DL PLUS
25dl加
25MULTI PLUS
25multi加
2.0 to 30 MHz 35HP, 35DL-HP
2至30兆赫35hp，35dl-hp
25HP PLUS
25HP PLUS
25HPV
25hpv
0.5 to 5.0 MHz
0.5至5兆赫
One of the advantages of a Panametrics-NDT Microscan contact transducer is its versatility; a single transducer can cover a broad thickness range in many engineering materials. Contact transducers are constructed with the unique WC-5 wearplate for greater durability and a longer life.
一個(gè)Panametrics-NDT Microscan接觸傳感器的優(yōu)點(diǎn)是它的通用性；一個(gè)單一的傳感器可以覆蓋在許多工程材料廣泛的厚度范圍。接觸式傳感器的構(gòu)造與獨(dú)特WC-5保護(hù)層更加耐用和更長(zhǎng)的生命。
|
頻率
(MHz)
|
英寸
|
毫米
|
探頭型號(hào)規(guī)格
|
訂購號(hào)碼
|
|
0.5
|
1
|
25
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M101-SB
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U8400017
|
|
1
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1
|
25
|
M102-SB
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U8400018
|
|
1
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0.5
|
13
|
M103-SB
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U8400020
|
|
2.25
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0.5
|
13
|
M106-RM, M106-SM
|
U8400023, U8400025
|
|
2.25
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0.5
|
13
|
M1036?
|
U8400019
|
|
5
|
0.5
|
13
|
M109-RM, M109-SM
|
U8400027, U8400028
|
|
5
|
0.25
|
6
|
M110-RM, M110-SM, M110H-RM**
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U8400030, U8400031, U8400029
|
|
10
|
0.25
|
6
|
M112-RM, M112-SM, M112H-RM**
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U8400034, U8400035, U8400033
|
|
10
|
0.125
|
3
|
M1016
|
U8400015
|
|
20
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0.125
|
3
|
M116-RM, M116-SM
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U8400038, U8400039
|
|
20
|
0.125
|
3
|
M116H-RM*
|
U8400037
|
RM = Right Angle Microdot; SM = Straight Microdot; SB = Straight BNC
?High Penetration Transducer *Use with Holder, P/N 2133 **Use with Holder, P/N 2132
RM =直角微粒；SM =直直的BNC微粒；某人
?High Penetration Transducer *Use with Holder, P/N 2133 **Use with Holder, P/N 2132
?高穿透?jìng)鞲衅?/span>*使用支架，P / N 2133 * *使用支架，P / N 2132
延遲塊式探頭
SONOPEN® Transducers
The Sonopen® transducer has a replaceable delay line that is tapered to a small contact area. This transducer makes reliable thickness measurements in applications such as turbine blades, threads on plastic bottle necks and tight radii on plastic containers. High-temperature Sonopen delay lines are also available.
sonopen®換能器
The Sonopen® transducer has a replaceable delay line that is tapered to a small contact area. This transducer makes reliable thickness measurements in applications such as turbine blades, threads on plastic bottle necks and tight radii on plastic containers. High-temperature Sonopen delay lines are also available.
該sonopen®傳感器有一個(gè)可替換的延遲線，是錐形的接觸面積小。這種傳感器是可靠的厚度測(cè)量中應(yīng)用如渦輪葉片，在塑料瓶頸和塑料容器的螺紋緊半徑。高溫sonopen延遲線也可。
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頻率
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晶片尺寸
|
探頭型號(hào)規(guī)格
|
|
MHz
|
英寸
|
毫米
|
直手柄
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直角手柄
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45° 手柄
|
|
15
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0.125
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3
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V260-SM
U8411019
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V260-RM
U8411018
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V260-45
U8411017
|
|
Tip diameter（齒頂圓直徑）
|
|
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英寸
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毫米
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探頭型號(hào)規(guī)格
|
|
0.08
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2
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DLP-3
|
|
0.06
|
1.5
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DLP-302
|
|
0.08
|
2
|
DLP-301*
|
使用高達(dá)350°F高溫延遲（175°C）
Delay Line Transducers
Panametrics-NDT Microscan delay line transducers provide excellent performance on very thin materials, elevated temperatures or in applications that require a high degree of thickness resolution.
延遲線傳感器
Panametrics-NDT Microscan delay line transducers provide excellent performance on very thin materials, elevated temperatures or in applications that require a high degree of thickness resolution.
Panametrics-NDT Microscan延遲線傳感器提供優(yōu)良的很薄的材料的性能，溫度升高或在需要高程度的厚度分辨率的應(yīng)用。
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Frequency
(MHz)
|
Element
inches
|
Diameter
mm
|
Transducer
Part Number
|
Transducer
Part Code
|
Holders
|
|
0.5
|
1
|
25
|
M2008
|
U8415001
|
-
|
|
2.25
|
0.5
|
13
|
M207-RB
|
U8410017
|
-
|
|
5
|
0.5
|
13
|
M206-RB
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U8410016
|
-
|
|
5
|
0.25
|
6
|
M201-RM
|
U8410001
|
-
|
|
5
|
0.25
|
6
|
M201H-RM
|
U8411030
|
2127
|
|
10
|
0.25
|
6
|
M202-RM, M202-SM
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U8410003, U8410004
|
-
|
|
10
|
0.25
|
6
|
M202H-RM
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U8507023
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2127
|
|
10
|
0.125
|
3
|
M203-RM, M203-SM
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U8410006, U8410007
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-
|
|
20
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0.125
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3
|
M208-RM, M208-SM
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U8410019, U8410020
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-
|
|
20
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0.125
|
3
|
M208H-RM
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U8410018
|
2133
|
|
20
|
0.125
|
3
|
M2055*
|
U8415013
|
-
|
|
30
|
0.25
|
6
|
V213-BC-RM*
|
U8411022
|
|
Replaceable Delay Lines
Standard Delay Lines
Standard delay lines are used in many applications. Special conditions such as high surface temperature, curvature of the material or hard-to-access areas may require the use of special delay lines.
可更換的延遲線
Standard Delay Lines
標(biāo)準(zhǔn)延遲塊
Standard delay lines are used in many applications. Special conditions such as high surface temperature, curvature of the material or hard-to-access areas may require the use of special delay lines.
標(biāo)準(zhǔn)延遲線的使用在許多的應(yīng)用。特殊條件下，如高的表面溫度，該材料或難以進(jìn)入的地區(qū)可能需要特殊的延遲線使用曲率。
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Element
Diameter
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延遲線型號(hào)規(guī)格
|
*大厚度
測(cè)量范圍*
|
|
Steel
Mode 2
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Steel
Mode 3
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Plastic
Mode 2
|
|
inches
|
mm
|
inches
|
mm
|
inches
|
mm
|
inches
|
mm
|
|
0.5
|
13
|
DLH-2
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1.0
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25
|
0.5
|
13
|
0.5
|
13
|
|
0.25
|
6
|
DLH-1
|
1.0
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25
|
0.5
|
13
|
0.5
|
13
|
|
0.125
|
3
|
DLH-3
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0.5
|
13
|
0.2
|
5
|
0.2
|
5
|
確切的范圍取決于材料的聲速，探頭頻率，零件的幾何形狀和表面狀態(tài)。
High Temperature Delay Lines
高溫延遲塊
High temperature delay lines function as a protective buffer between the hot surface of the test piece and the transducer's crystal. At elevated temperatures, intermittent contact is recommended to protect the transducer from thermal damage.
高溫延遲線作為一個(gè)緩沖保護(hù)之間的熱表面的試件和換能器的晶體。在升高的溫度下，間歇接觸建議保護(hù)傳感器的熱損傷。
|
晶片尺寸
|
高溫延遲
|
|
To 350 °F
(175 °C)
|
To 500 °F
(260 °C)
|
To 900 °F
(480 °C)
|
|
inches
|
mm
|
|
0.5
|
13
|
DLHT-201
|
DLHT-2
|
DLHT-2G
|
|
0.25
|
6
|
DLHT-101
|
DLHT-1
|
DLHT-1G
|
|
0.125
|
3
|
DLHT-301
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DLHT-3
|
DLHT-3G
|
水浸探頭
Immersion Transducers
Panametrics-NDT Microscan immersion transducers are designed to transmit and receive ultrasound in water. Thickness measurements by immersion technique are often preferred when the test piece has a complex geometry or in online applications. Typical offline applications include wall thickness measurements on small diameter plastic or metal tubing, scanned or rotary measurements and thickness measurements on sharply curved parts. Transducer focusing may be necessary depending on the application
浸沒式換能器
Panametrics-NDT Microscan immersion transducers are designed to transmit and receive ultrasound in water. Thickness measurements by immersion technique are often preferred when the test piece has a complex geometry or in online applications. Typical offline applications include wall thickness measurements on small diameter plastic or metal tubing, scanned or rotary measurements and thickness measurements on sharply curved parts. Transducer focusing may be necessary depending on the application
Panametrics-NDT Microscan浸入式傳感器的設(shè)計(jì)在水中超聲波的發(fā)射和接收。厚度測(cè)量采用浸漬技術(shù)往往是優(yōu)選，當(dāng)試件具有復(fù)雜的幾何形狀或在網(wǎng)上的應(yīng)用。典型的離線應(yīng)用包括壁厚測(cè)量小直徑的塑料或金屬管，掃描和旋轉(zhuǎn)的測(cè)量和厚度測(cè)量急劇彎曲的部分。換能器聚焦可能需要根據(jù)不同的應(yīng)用
|
Frequency
|
Element Diameter
|
型號(hào)規(guī)格
|
型號(hào)規(guī)格
|
|
(MHz)
|
inches
|
mm
|
|
2.25
|
0.5
|
13
|
M306-SU
|
U8410027
|
|
5
|
0.5
|
13
|
M309-SU
|
U8420001
|
|
5
|
0.25
|
6
|
M310-SU
|
U8420004
|
|
10
|
0.25
|
6
|
M312-SU
|
U8420008
|
|
15
|
0.25
|
6
|
M313-SU
|
U8420009
|
|
20
|
0.125
|
3
|
M316-SU
|
U8420011
|
Bubblers
We offer bubblers for easy implementation of immersion testing. They act as a holder for the transducers to maintain consistent water flow from transducer to test surface, and prevent the accumulation of air bubbles on the transducer face.
起泡的
We offer bubblers for easy implementation of immersion testing. They act as a holder for the transducers to maintain consistent water flow from transducer to test surface, and prevent the accumulation of air bubbles on the transducer face.
我們提供方便的實(shí)現(xiàn)浸泡測(cè)試起泡器。他們作為一個(gè)保持從傳感器測(cè)試表面一致的水流量傳感器支架，防止在傳感器表面氣泡的積累。
|
型號(hào)規(guī)格
|
正常開放
|
水通道
|
型號(hào)規(guī)格
|
|
inches
|
mm
|
inches
|
mm
|
|
B100
|
0.125
|
3
|
1.25
|
32
|
M310A-SM, M312A-SM, M316A-SM
|
|
B103*
|
0.35
|
9
|
0.575
|
14.5
|
M310-SU, M312-SU, M313-SU, M316-SU
|
|
B103W*
|
0.55
|
14
|
0.775
|
19.7
|
M306-SU, M309-SU
|
|
B103A*
|
0.35
|
9
|
0.575
|
14.5
|
same as B103
|
|
l The B103 has a V-notch shaped opening; the B103A and B103W are flat.
l B103有V形開口的b103a和b103w平。
|
Bubbler Transducer Assembly
起泡的換能器組件
Handheld bubbler transducers are available in either 20 MHz (V316B) or 10 MHz (V312B). They are immersion transducers that screw onto a bubbler assembly (B120), which has a replaceable stainless steel tip and a water feed tube. They offer high resolution and easy access inspection of thin materials.
手持起泡換能器在20 MHz的可用（v316b）或10兆赫（v312b）。他們是浸入式換能器，擰到鼓泡器組件（B120），其中有一個(gè)可更換不銹鋼針尖與供水管。他們提供高分辨率和薄的材料容易訪問檢查。
RBS-1 Immersion Tank
Panametrics-NDT RBS-1 immersion tank is designed to simplify ultrasonic thickness measurements using immersion techniques. It consists of a clear acrylic tank, a submersible pump and a transducer fixture in a single, portable unit. It is ideal for offline thickness measurements on metal, glass and plastic products such as small containers, pipe or tubing, sheets or plates or machined parts.
RBS-1浸泡罐
Panametrics-NDT RBS-1 immersion tank is designed to simplify ultrasonic thickness measurements using immersion techniques. It consists of a clear acrylic tank, a submersible pump and a transducer fixture in a single, portable unit. It is ideal for offline thickness measurements on metal, glass and plastic products such as small containers, pipe or tubing, sheets or plates or machined parts.
Panametrics-NDT RBS-1浸泡罐的設(shè)計(jì)簡(jiǎn)化超聲厚度測(cè)量使用浸沒技術(shù)。它是由丙烯酸坦克，潛水泵和一個(gè)單一的傳感器的夾具，便攜式裝置。在金屬線的厚度測(cè)量，它是理想的，玻璃和塑料等產(chǎn)品的小容器，管，板或板或機(jī)械零件。
Tank
? 5.5 x 12 x 8 in (140 x 305 x 200 mm)
? 0.83 gallon (3.1 liter) capacity
坦克
? 5.5 x 12 x 8 in (140 x 305 x 200 mm)
?5.5 x 12 x 8（140×305×200毫米）
? 0.83 gallon (3.1 liter) capacity
?0.83加侖（3.1升）容量
Pump
? 0 to 0.25 gallons (0 to 0.9 liters) per minute
? 115 or 230 V, 30 Watt (voltage range 90 to 135 VAC), 50 to 60 Hz
? Submersible (ground fault interrupter circuit recommended)
泵
? 0 to 0.25 gallons (0 to 0.9 liters) per minute
?0到0.25加侖（0到0.9升每分鐘）
? 115 or 230 V, 30 Watt (voltage range 90 to 135 VAC), 50 to 60 Hz
?115或230伏，30瓦（電壓范圍90至135伏），50到60赫茲
? Submersible (ground fault interrupter circuit recommended)
?潛水（接地故障斷路器線路推薦）
Couplants
The use of couplant is almost always necessary to provide acoustic coupling between the transducer and the test piece. We offer various types of couplants to suit virtually all applications
耦合劑
The use of couplant is almost always necessary to provide acoustic coupling between the transducer and the test piece. We offer various types of couplants to suit virtually all applications
偶聯(lián)劑的使用幾乎總是要提供傳感器和試件之間的聲耦合。我們以適應(yīng)幾乎所有的應(yīng)用程序提供各種類型的耦合劑
|
型號(hào)規(guī)格
|
Description說明
|
Volume體積
|
Application應(yīng)用
|
|
A2
AP
AQ
AG
|
Propylene Glycol
Propylene Glycol
Propylene Glycol
Propylene Glycol
|
2 oz (0.06 liter)
1 pint (0.47 liter)
1 quart (0.95 liter)
1 gallon (3.78 liter)
|
General purpose couplant for smooth surfaces. Chemically non-reactive; does not evaporate quickly. The maximum recommended temperature is 200 °F (90 °C)
|
|
B2
BQ
|
Glycerin
Glycerin
|
2 oz. (0.06 liter)
1 qt. (0.95 liter)
|
General purpose, more viscous and has a high acoustic impedance making it the preferred couplant for rough surfaces and highly attenuating materials.
|
|
D12
DG
D-5G
|
Gel Type
Gel Type
Gel Type
|
12 oz. (0.35 liter)
1 gal. (3.78 liter)
5 gal. (18.90 liter)
|
Rough surfaces such as sand-cast metals and fiberglass layups, weld inspections, overhead surfaces or vertical walls.
|
|
E-2
|
Ultratherm
|
2 oz. (0.06 liter)
|
500 °F to 970 °F (260 °C to 520 °C)
|
|
G-2
|
Medium Temp
|
2 oz. (0.06 liter)
|
0 °F to 600 °F (-12 °C to 315 °C) Easy removal at high temperatures. Non-toxic and biodegradable
|
|
SWC
|
Shear Wave
|
4 oz. (0.12 liter)
|
Normal Incidence Shear Wave, non-toxic, water soluble organic substance of very high viscosity.
|
試塊與線纜
Calibration Test Blocks
Test blocks are necessary for the calibration of ultrasonic thickness gages and should be used to maintain and verify the accuracy, dependability and reliability of ultrasonic measurements. Blocks are held to tighter tolerances than called out in ASTM E797 code. Metric test blocks are available
校準(zhǔn)試塊
Test blocks are necessary for the calibration of ultrasonic thickness gages and should be used to maintain and verify the accuracy, dependability and reliability of ultrasonic measurements. Blocks are held to tighter tolerances than called out in ASTM E797 code. Metric test blocks are available
試塊的超聲測(cè)厚儀校準(zhǔn)的必要性和應(yīng)保持和驗(yàn)證其準(zhǔn)確性，可靠性和超聲測(cè)量的可靠性。塊被認(rèn)為更嚴(yán)格的公差，比ASTM e797代碼調(diào)用了。計(jì)量測(cè)試塊可
|
規(guī)格型號(hào)
|
Material材料
|
Steps步驟
|
|
2211E
|
304 Stainless Steel
|
.100, .200, .300, .400 and .500 in
|
|
2212E
|
1018 Carbon Steel
|
.250, .500, .750, .400 and 1.00 in
|
|
2213E
|
7075-T6 Aluminum
|
.100, .200, .300, .400 and .500 in
|
|
2214E
|
1018 Carbon Steel
|
.100, .200, .300, .400 and .500 in
|
|
2214M
|
1018 Carbon Steel
|
2.5, 5.0, 7.5, 10.0 and 12.5 mm
|
Transducer Cables
Olympus-NDT offers a wide selection of transducer cables suitable for all ultrasonic thickness gaging instrumentation
傳感器電纜
Olympus-NDT offers a wide selection of transducer cables suitable for all ultrasonic thickness gaging instrumentation
奧林巴斯NDT提供所有超聲厚度測(cè)量?jī)x器廣泛選擇合適的傳感器電纜
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規(guī)格型號(hào)
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Connectors連接器
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Available Lengths有效長(zhǎng)度
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LCM-74-X
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Small LEMO® 00 to Microdot®
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3 ft (0.9 m), 4 ft (1.2 m),
6 ft (1.8 m)
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LCB-74-X
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Small LEMO® 00 to BNC
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3 ft (0.9 m), 4 ft (1.2 m),
6 ft (1.8 m)
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BCM-74-X
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BNC to Microdot®
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3 ft (0.9 m), 4 ft (1.2 m),
6 ft (1.8 m)
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LCU-74-X
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LEMO® 00 to UHF
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3 ft (0.9 m)
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Standard
標(biāo)準(zhǔn)RG174 Microdot連接器
? Standard cables are recommended for normal usage.
?標(biāo)準(zhǔn)電纜被推薦用于正常使用。
? Standard cables are recommended for normal usage.
Heavy Duty - Teflon®
高強(qiáng)度線纜®
? Heavy duty, Teflon® (HD) transducer cables may provide durability and longer life.
?重型，聚四氟乙烯®（HD）傳感器電纜可提供耐久性和壽命。
? Heavy duty, Teflon® (HD) transducer cables may provide durability and longer life.
Waterproof
防水
? Waterproof (W) cables are recommended in many tests with immersion transducers. These cables provide a waterproof connection good to about 30 ft (10 m) of fresh water. At greater depths, special cables are available.
?防水（W）電纜在浸入式換能器試驗(yàn)推薦。這些電纜提供約30英尺（10米）的防水連接好的新鮮水。在更大的深度，特殊的電纜有。
? Waterproof (W) cables are recommended in many tests with immersion transducers. These cables provide a waterproof connection good to about 30 ft (10 m) of fresh water. At greater depths, special cables are available.
Heavy Duty - Armored PVC Jacket
重型裝甲聚氯乙烯護(hù)套
? Heavy duty, armored PVC jacket (HDAP) transducer cables have a spiral stainless steel jacket with a solid PVC coating. Maximum length is 20 ft (7 m).
?重型，鎧裝聚氯乙烯護(hù)套（hdap）傳感器的電纜有一個(gè)不銹鋼螺旋套與固體PVC涂層。*大長(zhǎng)度是20英尺（7米）。
? Heavy duty, armored PVC jacket (HDAP) transducer cables have a spiral stainless steel jacket with a solid PVC coating. Maximum length is 20 ft (7 m).
Heavy Duty - Armored Silicone Jacket
重型裝甲硅膠套
? Heavy duty, armored super flexible silicone jacket (HDAS) transducer cables combine a spiral stainless steel jacket with a heavy silicone coating for great flexibility. Length can be specified up to 20 ft (7 m).
?重型裝甲，超級(jí)靈活的硅膠套（HDA）傳感器電纜結(jié)合螺旋不銹鋼外套有很大的靈活性大的有機(jī)硅涂層。可指定長(zhǎng)度可達(dá)20英尺（7米）。
? Heavy duty, armored super flexible silicone jacket (HDAS) transducer cables combine a spiral stainless steel jacket with a heavy silicone coating for great flexibility. Length can be specified up to 20 ft (7 m).
Heavy Duty - Stainless Steel
重型不銹鋼
? Heavy duty, armored stainless steel jacket (SSA) transducer cables are recommended for heavy and industrial use provide flexibility, protection and long life.
?重型裝甲，不銹鋼套（SSA）傳感器的電纜被推薦為重工業(yè)使用提供了靈活性，保護(hù)和壽命長(zhǎng)。
? Heavy duty, armored stainless steel jacket (SSA) transducer cables are recommended for heavy and industrial use provide flexibility, protection and long life.
Handheld bubbler transducers are available in either 20 MHz (V316B) or 10 MHz (V312B). They are immersion transducers that screw onto a bubbler assembly (B120), which has a replaceable stainless steel tip and a water feed tube. They offer high resolution and easy access inspection of thin materials.
M109-RM| M109-SM 超聲波測(cè)厚探頭Olympus奧林巴斯 廠家生產(chǎn)代理
M109-RM| M109-SM 超聲波測(cè)厚探頭Olympus奧林巴斯 廠家生產(chǎn)代理
M109-RM| M109-SM 超聲波測(cè)厚探頭Olympus奧林巴斯 廠家生產(chǎn)代理
M109-RM| M109-SM 超聲波測(cè)厚探頭Olympus奧林巴斯 廠家生產(chǎn)代理
M109-RM| M109-SM 超聲波測(cè)厚探頭Olympus奧林巴斯 廠家生產(chǎn)代理