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(qū)動(dòng)的 2" 溫度指示計(jì)，帶有用于跳閘警報(bào)和/或關(guān)閉設(shè)備的內(nèi)置電氣開關(guān)。該型號(hào)具有 12 英尺毛細(xì)管，標(biāo)準(zhǔn)1/2-14 NPT 螺紋和 130-250° F 的溫度范圍。這款堅(jiān)固耐用、經(jīng)久耐用的儀器通過(guò)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(qū)動(dòng)的壓力計(jì)具有密封的毛細(xì)管和傳感球。當(dāng)受到熱量時(shí)，傳感球中的液體變成蒸汽，對(duì)隔膜機(jī)構(gòu)產(chǎn)生壓力。隔膜將這種蒸汽壓力轉(zhuǎn)化為機(jī)械儀表讀數(shù)。儀表指針用作溫度指示器和一個(gè)開關(guān)極，當(dāng)它接觸可調(diào)限位觸點(diǎn)時(shí)完成電路。觸點(diǎn)通過(guò)接地隔離。該壓力計(jì)具有自清潔運(yùn)動(dòng)，以增強(qiáng)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.