信德迈代理摩菲Murhy A20T-0S-250-25-1/2直感式温度表

信德迈代理摩菲Murhy A20T-OS-250-25-1/2直感式温度表 A20T-0S-250-25-1/2



A20T-250-12-1/2 温度 Swichgage® 是隔膜驱动的 2" 温度指示计，带有用于跳闸警报和/或关闭设备的内置电气开关。该型号具有 12 英尺毛细管，标准1/2-14 NPT 螺纹和 130-250° F 的温度范围。这款坚固耐用、经久耐用的仪器通过聚碳酸酯外壳和镜头的组合、抛光不锈钢表圈密封，与环境隔绝, 和 O 形环密封件。这种蒸汽驱动的压力计具有密封的毛细管和传感球。当受到热量时，传感球中的液体变成蒸汽，对隔膜机构产生压力。隔膜将这种蒸汽压力转化为机械仪表读数。仪表指针用作温度指示器和一个开关极，当它接触可调限位触点时完成电路。触点通过接地隔离。该压力计具有自清洁运动，以增强电气连续性。


A20 Series (2 inch/51 mm dial) and the A25 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 shutdown devices.

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



Murphy Mechanical Temperature Gauge A20T-OS

Dial:White on black; U.S.A. standard scale is dual scale °F/°C; others available.

Case:Glass filled/Polycarbonate, corrosion-resistant; steel mounting clamp included.

Bezel:Polished stainless steel, standard; others are available.

Pointer:Tempered nickel silver; red tip.

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.

Adjustable Limit Contact (A20T and A25T):SPST contact; pilot-duty only, 2 A @ 30 VAC/ VDC; isolated from case ground. Normally Closed when the high limit is met. Normally Open when pointer is in normal operating range. Contacts are gold flashed silver.Limit Contact Adjustment:by a 1/16 in. hex wrench thru 99% of the scale.Wiring:A20T: Number 4 screw terminals; A25T: Number 6 screw terminals.