Application
Standard HM8443 gauges are for refrigerant receivers rated up to 450 PSI. High pressure models of the HM8443 gauges are for refrigerant receivers rated up to 700 PSI.

标准压力和高压模型之间的区别是浮子和垫片。较小的高压浮子用于高压模型。在高压模型中使用窄高压垫片。

带有视觉拨号的型号可与直接读取的拨号和直接读取加电压输出的拨号。它们具有1-2 伏、1-6 伏和霍尔效应表盘的传统输出电压, 输出为0.5 至4.5 伏。所有带有电压输出的表盘均可与正在商业/超市应用中的工业可编程控制器一起使用, 用于连续、可重复地测量制冷剂水平。

General Information & Features
These gauges feature a 4-bolt brass head with integral mounting pads to accommodate the attachment of an electrical junction box. The junction boxes furnished with these gauges are not watertight and it is recommended that the connections inside boxes be made using waterproof connectors for rooftop and other outdoor service applications.
These gauges are typically furnished with neoprene gaskets which are compatible with several commonly used refrigerants and lubricants. Other gasket materials may be available.

配有这些仪表的表盘是磁力驱动的。这意味着可以拆除表盘, 并通过拆除两个 #6-32 螺丝来更换表盘, 而不会干扰四个仪表安装螺栓并释放接收器内容。

原配有直接读取或直接读取加电压输出的仪表上的表盘通常是可互换的。换句话说, 只需卸下两个 #6-32 螺丝, 就可以用0.5 至4.5 伏霍尔效应表盘替换1-2 伏输出拨号。

霍尔效应拨号具有0.5 至4.5 伏输出, 引入了以前不可用的无噪声可靠性和使用寿命。所有直接只读的拨号和直接读取电压输出都适用于室内和室外位置。

Switch Gauges
Similar gauges are available as switches only. The switch gauges have no visual gauge readout. Switch dials are replaceable but not interchangeable with direct read dials. These switches operate on line voltage and are designed for indoor locations unless all connections are protected from water.

Documents
Data Sheet
TS015 – Hall Effect Twinsite for Refrigerant Liquid Level Gauges
MS-501/502 Installation Instructions
Adapters 22 Series – Senior Forged Steel
Gasket Guide 115-774 (available upon request)