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Murphy 20T and 25T Temperature Swichgages温度表
MURPHY 20T 25T Mechanical Temperature Gauges

20T / 25T Series Temperature Swichgage | Murphy by Enovation Controls

Murphy 20系列(2英寸/ 51毫米刻度盘)和25系列(2- 1/2英寸/ 64毫米刻度盘)是隔膜驱动的温度指示量具,带有用于触发警报和/或关闭的内置电气开关-down设备。范围从32°-120°F(0°-45°C)到300°-440°F(160°-220°C)。

Swichgage ? 工具是建立在美国和保护了发动机和设备的应用,如石油和天然气,船舶,水利,建筑和货运应用程序监控发动机冷却液,曲轴箱油,变速箱油和其他超过80年。


20T / 25T Series Temperature Swichgage | Murphy by Enovation Controls

  • 表盘 :黑底白字,°F /°C双刻度(其他可用)
  • 外壳 :电镀钢; 随附安装夹(直接安装型号除外)
  • 挡板: 抛光不锈钢,标准; 其他可用
  • 指针: 钢化镍银
  • 镜片: 聚碳酸酯纤维,耐冲击
  • 传感元件 :铍铜膜片。
  • 毛细管* :PVC铠装铜; 1.2毫米(4英尺)。 不锈钢装甲可选
  • 感应灯泡* :铜
  • 量规精度: 请参阅技术销售公告
  • 最高温度: 请参阅技术销售公告
  • 最高环境温度范围: -40°F(-40°C)至150°F(66°C)
  • 可调限位触点(20T和25T): SPST触点; 仅飞行员工作,2 A @ 30 VAC / VDC; 穿过外壳的接地路径。 达到上限时,常闭(NC)。 当指针在正常操作范围内时,常开(NO)。 触点是闪金的银。
  • 极限接触调整: 用1/16英寸六角扳手穿过刻度的100%
  • 限制接触导线: 18 AWG(1.0毫米)2 x 12英寸(305毫米)
  • 快动开关额定值(20TE和25TE): SPDT,3 A @ 30 VDC感性; 4 A @ 125 VAC感性
  • 快动开关导线: 20 AWG(0.75 mm2)x 12 in。(305 mm)
  • 单位重量:
    • 20系列:12.7盎司。 (0.39公斤)
    • 25系列型号:13.8盎司。 (0.43公斤)
  • 单位尺寸:
    • 20系列:4-3 / 4 x 4-3 / 4 x 2-3 / 4英寸(121 x 121 x 70毫米)
    • 25系列型号:4-3 / 4 x 4-3 / 4 x 3英寸(121 x 121 x 76毫米)

*有关可选的毛细管长度,发动机适配器,感应灯泡和范围组合,请参阅公告8428。

 

量具机构封闭在涂有防腐蚀涂层的钢制外壳中。 聚碳酸酯,耐摔镜头和抛光不锈钢表圈有助于保护这种坚固耐用的仪器。 这些蒸汽驱动的压力计具有密封的毛细管和传感灯泡。 当受热时,传感灯泡中的液体变为蒸气,从而对隔膜机构产生压力。 隔膜将该蒸汽压力转换为机械压力表读数。

冷却液或油温

  • 20T和25T系列止动阀
    对于这些型号, 止 动计指针用作温度指示器和一个开关杆,当触及可调限位触点时,该开关杆就构成了完整的电路。 触点通过Swichgage盒接地。 它们具有自清洁动作,可增强电连续性。
  • 20TL和25TL Swichgage仪器
    用于福特Worldwide发动机。 随附特殊的感应灯泡。
  • 20TE (以前是20ESR) 和25TE (以前是25ESR) 带内部SPDT快动开关而不是单极/指针触点的 Swichgage仪器内部快动开关
    型号。 当开关在温度上升时闭合时,它就被置位。 随着温度降低,开关复位。
  • 20TABS和25TABS应变仪
    与带有预报警的内部SPDT快动开关的20 / 25T相同。

气缸盖温度

  • 20TH (was 20TL8133) 和25TH (was 25TL8133) 压差仪
    用于风冷发动机。

直接安装型号

  • 20TD折弯仪
    与20T相同。 可用范围:220°F(104°C)或250°F(121°C)。 包括1/4 x 4英寸(6 x 102毫米)的感应灯泡。
  • 20SD汇兑工具
    与20T相同。 可用范围:220°F(104°C)或250°F(121°C)。 包括11/32 x 1-1 / 2英寸(9 x 38毫米)感应灯泡。

仅限量具的模型

  • 20TG和25TG MurphyGage压力计,
    无触点。

Murphy 温度SWICHGAGE开关表20T和25T系列

-2英寸和2.5英寸(51mm和64mm)
-用于冷却水或机油温度
-量程范围450oF(232℃)
-多种规格的传感头和安装接头
-表面有可调节触点
20TE和25TE系列
-除了微动开关外,与20T和25T相似
-工厂设定开关点
20TABS和25TABS系列
-除了带内置式微动开关用于预报警外,与20T和25T相似

  • Combination Indicating Gage and Limit Switch
  • Critical/High Temperature Limit Switch Is Visible and Adjustable (Most Models)
  • Switch Can Activate Alarms and/or Shut Down Equipment
  • Contact Grounds Through Case

MURPHY 20 Series (2 inch/51 mm dial) and the 25 Series (2-1/2 inch/64 mm dial) Swichgage models are diaphragm-actuated, temperature-indicating gages with built-in electrical switches for tripping alarms and/or shut-down devices.

Ranges are available from 32°-120°F (0°-45°C) through 300°-440°F (160°-220°C).

The gage mechanism is enclosed in a steel case coated to resist corrosion. A polycarbonate, break- resistant lens and a polished, stainless steel bezel help protect this rugged, built-to-last instrument.

These vapor-actuated gages feature a sealed capillary tube and a sensing bulb. When subjected to heat, the liquid in the sensing bulb changes to vapor creating pressure against the diaphragm mechanism. The diaphragm translates this vapor pressure into a mechanical gage reading.

For series 20T and 25T, the gage pointer acts as a temperature indicator and as one switch pole which completes a circuit when it touches the adjustable limit contact. Contact(s) are grounded through the Swichgage case. They have a self-cleaning motion to enhance electrical continuity.

Models 20TE and 25TE have internal snap-acting SPDT switches. Gage-only models without contacts (Murphygage? instrument) are also available.

These instruments are used on industrial engines and equipment in oil field, marine, irrigation, construction and trucking industries and for monitoring engine coolant, crankcase oil and transmission oil.

Base Models

Coolant or Oil Tempature
20T and 25T Series Swichgage : For these models the gage pointer makes with an adjustable contact to complete a pilot-duty circuit.

20TL and 25TL Swichgage instrument : For use on Ford Worldwide engines. Supplied with special sensing bulb.

20TE and 25TE Swichgage instrument internal snap-switch : 20TE (was 20ESR) and 25TE (was 25ESR) Models with internal SPDT snap-switches, instead of the single pole/pointer contact(s). When the switch closes on rising temperature, it becomes set. As temperature decreases, the switch resets.

20TABS and 25TABS Swichgage instrument : Same as 20/25T with internal SPDT snap-switch for pre-alarm.

Cylinder Head Temperature
20TH and 25TH Swichgage instrument : 20TH (was 20TL8133) and 25TH (was 25TL8133). For use on air-cooled engines.

Direct Mount Models
20TD Swichgage instrument : Same as 20T. Available ranges: 220°F (104°C) or 250°F (121°C). Includes 1/4 x 4 in. (6 x 102 mm) sensing bulb.

20SD Swichgage instrument : Same as 20T. Available ranges: 220°F (104°C) or 250°F (121°C). Includes 11/32 x 1-1/2 in. (9 x 38 mm) sensing bulb.

Gage–Only Models
20TG and 25TG Murphygage : Gages without contact(s).

 

Specifications

Dial : White on black; U.S.A. standard scale is dual scale ?°F/?°C; others available (see How to Order)

Case : Plated steel; mounting clamp included (except direct mount models)

Bezel : Polished stainless steel, standard; others available (see How to Order)

Pointer : Tempered nickel silver

Lens : Polycarbonate, high-impact

Sensing Element : Beryllium copper diaphragm

Capillary : PVC armored copper; 4 ft. (1.2 m). Stainless steel armor optional

Sensing Bulb : Copper*

Gage Accuracy : See Temperature Accuracy Chart

Maximum Temperature : See Temperature Ranges and Factory Settings Table

Maximum Ambient Temperature : -40?°F (-40?°C) through 150?°F (66?°C)

Adjustable Limit Contact (20T and 25T) : SPST contact; pilot duty only, 2 A @ 30 VAC/ VDC; Ground path through encasement. Normally Closed (NC) when the high limit is met. Normally Open (NO) when pointer is in normal operating range. Contacts are gold flashed silver.

Limit Contact Adjustment : By a 1/16 in. hex wrench through 100% of the scale

Limit Contact Wire Leads : 18 AWG (1.0 mm) 2 x 12 in. (305 mm)

Snap-Switch Rating (20TE and 25TE) : SPDT, 3 A @ 30 VDC inductive; 4 A @ 125 VAC inductive

Snap-Switch Wire Leads : 20 AWG (0.75 mm2) x 12 in. (305 mm)

Unit Weight : 20 Series: 12.7 oz. (0.39 kg); 25 Series Models: 13.8 oz. (0.43 kg)

 

Unit Dimensions :

20 Series: 4-3/4 x 4-3/4 x 2-3/4 in. (121 x 121 x 70 mm)

25 Series Models: 4-3/4 x 4-3/4 x 3 in. (121 x 121 x 76 mm)

 

- 产品技术资料下载

For more information about this product, you can download the related literature here:

 

20T-250-4-1/2 (10702042): Temperature Swichgage

20T-250-6-1/2 (10702043) Temperature Swichgage 20T-250-8-1/2 (10702044): Temperature Swichgage
20T-250-10-1/2 (10702045): Temperature Swichgage

20T-250-12-1/2 (10702046): Temperature Swichgage 20T-250-16-1/2 (10702048): Temperature Swichgage
20T-250-20-1/2 (10702050): Temperature Swichgage

20T-250-25-1/2 (10702051): Temperature Swichgage 20T-300-4-1/2 (10702067): Temperature Swichgage
20T-300-6-1/2 (10702068): Temperature Swichgage

20T-320-4-1/2 (10702081): Temperature Swichgage 20T-320-6-1/2 (10702082): Temperature Swichgage
   
20T-320-12-1/2 (10702085): Temperature Swichgage    

 

Murphy 20T Temperature Swichgages
20T-250-4-1/2 (10702042): Temperature Swichgage
20T-250-6-1/2 (10702043) Temperature Swichgage
20T-250-8-1/2 (10702044): Temperature Swichgage
20T-250-10-1/2 (10702045): Temperature Swichgage
20T-250-12-1/2 (10702046): Temperature Swichgage
20T-250-16-1/2 (10702048): Temperature Swichgage
20T-250-20-1/2 (10702050): Temperature Swichgage
20T-250-25-1/2 (10702051): Temperature Swichgage
20T-300-4-1/2 (10702067): Temperature Swichgage
20T-300-6-1/2 (10702068): Temperature Swichgage
20T-320-4-1/2 (10702081): Temperature Swichgage
20T-320-6-1/2 (10702082): Temperature Swichgage
20T-320-12-1/2 (10702085): Temperature Swichgage

Ranges are available from 32-120°F (0-45°C) thru 300-440°F (160-220°C).
Applications

Industrial engines and equipment in Oil Field, Marine, Irrigation, Construction and Trucking industries. Monitoring Engine Coolant, Crankcase Oil, Transmission Oil.

Base Models

Coolant or Oil Temperature
20T and 25T Series Swichgage
For these models the gage pointer makes with an adjustable contact to complete a pilot-duty circuit.

20TL and 25TL Swichgage instrument
For use on Ford Worldwide engines. Supplied with special sensing bulb.

20TO Swichgage instrument
Same as 20T with a special dial for Oil Temperature.

20TE and 25TE Swichgage instrument
20TE (was 20ESR) and 25TE (was 25ESR). Models with internal SPDT snap-switches, instead of the single pole/pointer contact(s). When the switch closes on rising temperature, it becomes Set. As temperature decreases the switch Resets.

20TABS and 25TABS Swichgage instrument
Same as 20/25T with internal SPDT snap-switch for pre-alarm.

Cylinder Head Temperature
20TH and 25TH Swichgage instrument
20TH (was 20TL8133) and 25TH (was 25TL8133).
For use on Air Cooled engines.

Direct Mount Models
20TD Swichgage instrument
Same as 20T. Available ranges: 220°F (104°C ) or 250°F (121°C). Includes 1/4 x 4 in. (6 x 102 mm) sensing bulb.

20SD Swichgage instrument
Same as 20T. Available ranges: 220°F (104°C ) or 250°F (121°C). Includes 11/32 x 1-1/2 in. (9 x 38 mm) sensing bulb.

Gage–Only Models
20TG and 25TG Murphygage
Gages without contact(s).

 


Murphy Instrument Distributor

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信德迈科技(北京)有限公司 CNMEC Technology

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