德国ELSA+GANTER公司的油位指示器，采用油位观察级别观察玻璃，耐温高达100℃。通过RoHS认证。采用EPDM（三元乙丙橡胶）密封件，确保高温下密封的可靠性。同时有GN 743，GN 743.7，GN 743.4等类型可选。

“Oil level sight glasses GN 743.2 / GN 743.3 offer genuine glass of high

stability and scratch proof. The sealing is achieved with an O-ring on the

periphery and not on the face edge of the glass. Leak tightness is therefore

not affected by axial pressures.

The outside diameter of these oil level sight glasses with recessed hexagon

is chosen to match mounting holes for tube connections according

to DIN 3852.

The seal is housed in a groove and it can therefore not be lost. In addition,

this groove prevents the seal from being extruded when the sight glass

is tightened.

Oil level sight glasses GN 743.2 / GN 743.3 can be used on pressurised

oil tanks. Tests regarding maximum pressure are available on request.”