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This symbol, when noted on a product enclosure or barrier, indicates that a risk of electrical shock and/or
electrocution exists.
This symbol, when noted on the product, identifies the location of the connection for Protective Earth
(ground).
This symbol, when noted on the product, identifies the location of a fuse or current limiting device.
This symbol, when noted on the product, indicated the presence of devices sensitive to Electro-static
Discharge (ESD) and indicated that care must be taken to prevent damage with the equipment.
2.1.3 Confined space precautions
DANGER
Explosion hazard. Training in pre-entry testing, ventilation, entry procedures, evacuation/rescue
procedures and safety work practices is necessary before entering confined spaces.
Important Note: The following information is provided to guide users of Flo-Dar Sensors on the
dangers and risks associated with entry into confined spaces.
On April 15, 1993, OSHA’s final ruling on CFR 1910.146, Permit Required Confined Spaces, became law. This new
standard directly affects more than 250,000 industrial sites in the U.S.A., and was created to protect the health and
safety of workers in confined spaces.
Definition of a confined space:
A confined space is any location or enclosure that presents or has the immediate potential to present one or more
of the following conditions:
• An atmosphere with less than 19.5% or greater than 23.5% oxygen and/or more than 10 ppm Hydrogen
Sulfide (H
2
S).
• An atmosphere that may be flammable or explosive due to gases, vapors, mists, dusts or fibers.
• Toxic materials which upon contact or inhalation, could result in injury, impairment of health or death.
Confined spaces are not designed for human occupancy. They have restricted entry and contain known or potential
hazards. Examples of confined spaces include manholes, stacks, pipes, vats, switch vaults, and other similar
locations.
Standard safety procedures must always be followed prior to entry into confined spaces and/or locations where
hazardous gases, vapors, mists, dusts or fibers may be present. Before entering any confined space check with
your employer for procedures related to confined space entry.
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