信德邁代理摩菲Murhy A20T-OS-250-25-1/2直感式溫度表 A20T-0S-250-25-1/2



A20T-250-12-1/2 溫度 Swichgage® 是隔膜驅動的 2" 溫度指示計，帶有用于跳閘警報和/或關閉設備的內置電氣開關。該型號具有 12 英尺毛細管，標準1/2-14 NPT 螺紋和 130-250° F 的溫度范圍。這款堅固耐用、經久耐用的儀器通過聚碳酸酯外殼和鏡頭的組合、拋光不銹鋼表圈密封，與環(huán)境隔絕, 和 O 形環(huán)密封件。這種蒸汽驅動的壓力計具有密封的毛細管和傳感球。當受到熱量時，傳感球中的液體變成蒸汽，對隔膜機構產生壓力。隔膜將這種蒸汽壓力轉化為機械儀表讀數(shù)。儀表指針用作溫度指示器和一個開關極，當它接觸可調限位觸點時完成電路。觸點通過接地隔離。該壓力計具有自清潔運動，以增強電氣連續(xù)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.