Rice Lake Z6 Single-Ended Beam, SS Welded-seal, IP67, OIML C3 - Manual (Page 9)

Choosing the Correct Load Cell 5
3.3 Ingress Protection (IP) Rating Guide
If a hermetically sealed cell is necessary, further classification is needed to be sure of the type of protection a particular cell offers.
For hermetically sealed cells, Rice Lake Weighing Systems uses the Ingress Protection (IP) rating system. We find the IP numbers
and their definitions are suitable for the classification of hermetically sealed and environmentally sealed load cells, and only apply
IP numbers to such cells. The IP numbers on a hermetically sealed cell further specify the treatment a specific cell can endure in
environments more severe than simple washdown. The following tables define the IP numbers alone and in conjunction with the
hermetically sealed rating.
Example:
Protection level offered by
an IP67 rated product
Protection against solid objects
First number (in this case 6)
0 No protection
1 Protected from solid objects up to 50 mm (e.g., accidental touch by hands)
2 Protected from solid objects up to 12 mm (e.g., fingers)
3 Protected from solid objects more than 2.5 mm (e.g., tools and small wires)
4 Protected from solid objects more than 1 mm (e.g., small wires)
5 Protected from dust; limited entrance (no harmful deposit)
6 Totally protected from dust
Protection against liquids
Second number (in this case 7)
0 No protection
1 Protected from vertically-falling drops of water (e.g., condensation)
2 Protected from direct sprays of water up to 15° from vertical
3 Protected from direct sprays of water up to 60° from vertical
4 Protected from water sprayed from all directions; limited entrance allowed
5 Protected from low pressure jets of water from all directions; limited entrance
allowed
6 Protected from strong jets of water (e.g., for use on ship decks);
limited entrance allowed
7 Protected from the effects of immersion between 15cm and 1m
8 Protected from extended periods of immersion under pressure
IP Numbers with Hermetically Sealed (HS)
or Environmentally Protected (EP) Ratings
Rating Protection
EP Dust proof, not protected from moisture or water
IP65 Dust proof, protected from splashes and low-pressure jets
IP66 Dust proof, protected from strong water jets
IP67 Dust proof, protected from temporary immersion in water
1 meter deep for 30 minutes
IP68 Dust proof, protected from continuous immersion in water under
more severe conditions than IP67
IP66/68 Dust proof, protected from strong water jets and/or
constant immersion
IP69K Dust tight and withstands high-pressure, high-temperature water
mited entrance (no harmful deposit)
dust
6 Totally protected from dust
of immersion between 15cm and 1m
7 Protected from the effects of immersion between 15cm and 1m
IP 67
Manufacturers may give a NEMA rating
to cells. This system was established
for electrical enclosures and is difficult
to apply to load cells. However, if you
see a NEMA rating and need a general
idea of what it means, IP67 and NEMA
6 cells are comparable and meet similar
requirements.
Time invested in a well-considered choice
offers large returns in the long run. If
there is any doubt as to which cell to use,
consult with a company such as Rice Lake
Weighing Systems that offers experience
and knowledge with every load cell.