EN 543.3 Fluid Level Sight Glasses Technopolymer Plastic, with Prismatic Reflector


ELESA original design
code: HGFT.PR

Product description


The window of prismatic EN 543.3 fluid level sight glasses is embedded in the body during the injection process and it is therefore absolutely leaktight.

Prismatic fluid level sight glasses use the so called prismatic effect of a cat’s eye to give a clear and unmistakable fluid level reading irrespective of oil colour or viscosity. The advantage of these effects becomes obvious in case of a total underfilling or overfilling and monitoring the situation under unfavourable conditions.

The seal is embedded in a radial undercut and it cannot be extruded during the tightening operation.

EN 543.3 fluid level sight glasses can also be used on pressurized tanks. Tests regarding maximum pressure are available.

Assembly instruction:
For mounting on walls of less than 4 mm thickness please use a GN 7430 mounting nut.


Technopolymer (Polyamide PA)
  • Black, matte finish
  • Temperature resistant up to 212 °F (100 °C)
  • Pressure resistant up to 3 bar

Sight glass
Plastic, crystal-clear
Technopolymer (Polyamide PA-T)

Rubber NBR (Perbunan®)

RoHS compliant


Mounting nuts GN 7430

On request

Metric threads

Technical drawing

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EN 543.3 Technopolymer Plastic Fluid Level Sight Glasses, with Prismatic Reflector sketch

Part Options / Table

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Dimensions in: Inch (change to Metric)
d1d2d3l1l2sTightening torque
in Nm
0.591/2 NPT0.
0.713/4 NPT0.
0.911 NPT0.
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Dimensions in: Inch (change to Metric)
d1d2d3l1l2sTightening torque
in Nm
0.59G 1/21.100.390.330.946 ... 8
0.71G 3/41.380.390.331.268 ... 10
0.91G 11.690.430.371.5010 ... 12
1.18G 1 1/41.970.430.351.8112 ... 15

Build & Price

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Sight glass d1
Thread d2

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Total US Dollars (net)
In stock: 10
In Stock
Please note our quantity discounts (US Dollars).
≥ 250$4.98
Prop 65: -
Please contact our Sales Department for more information: 800-877-8351
RoHS: -
This part is new in our product range, no details are available at this time. For more recent details on the RoHS compatibility, please contact our Sales Department!
Weight: -
If weight is not listed, please contact our Sales Department for additional information regarding weight.
Phone: 800-877-8351
All Prices are in US Dollars. Taxes Not Included.

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