CX1100-0003壓力表可以根據(jù)不同的分類標(biāo)準(zhǔn)進(jìn)行劃分,下面是常見的幾種分類方式:
指針式壓力表和數(shù)字式壓力表:按照顯示方式來劃分,指針式壓力表采用指針和刻度盤來顯示壓力,數(shù)字式壓力表采用數(shù)字顯示屏來顯示壓力。
橡膠套壓力表、液體封閉式壓力表和膜片式壓力表:按照測量元件來劃分,橡膠套壓力表采用彈性變形的橡膠套來感應(yīng)壓力變化,液體封閉式壓力表采用液體的體積變化來感應(yīng)壓力變化,膜片式壓力表則采用金屬膜片來感應(yīng)壓力變化。
直接連接式壓力表和分離式壓力表:按照壓力表與被測介質(zhì)的連接方式來劃分,直接連接式壓力表和被測介質(zhì)直接相連,而分離式壓力表與被測介質(zhì)通過管路連接。
普通型壓力表、防爆型壓力表、高溫型壓力表等:按照使用場合和環(huán)境要求來劃分,不同的壓力表針對(duì)不同的使用場合和環(huán)境要求具有不同的特點(diǎn)和優(yōu)勢(shì)。
總之,壓力表的分類方式較多,我們?cè)谶x購壓力表時(shí)應(yīng)根據(jù)實(shí)際需要選擇合適的壓力表類型。
壓力表符號(hào)
一個(gè)圓圈,圓圈里向右上角(45度)畫一個(gè)箭頭。如圖片里的3和5號(hào)符號(hào)即是壓力符號(hào)。
壓力表讀數(shù)單位符號(hào):在壓力表上會(huì)標(biāo)注所采用的壓力單位,常見的有MPa(兆帕)、kPa(千帕)、bar(巴)、psi(磅力/平方英寸)等。在讀取壓力表時(shí),需要注意采用的單位。
壓力表精度等級(jí)符號(hào):壓力表的精度等級(jí)通常標(biāo)注在壓力表上,例如0.5級(jí)、1.0級(jí)等,表示壓力表的測量誤差范圍。
壓力表使用環(huán)境符號(hào):一些壓力表上會(huì)標(biāo)注其適用的環(huán)境條件,例如大使用溫度、濕度等信息。
壓力表閥符號(hào):一些的壓力表上可能配備有閥,以防止過高的壓力對(duì)儀器造成損壞,閥符號(hào)可以表示該裝置的位置和功能。
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