Most of the ThermoProbe thermometers we make are considered to be “intrinsically safe” as originally manufactured. In the event that any component(s) associated with electrical or electronic portion of the device fails, there will not be sufficient energy to cause an ignition while in a flammable atmosphere. The materials that are used to construct the enclosure and probe assembly are unlikely to cause a spark if they were ever to contact any other materials. The materials used are specific stainless steel and aluminum alloys, and plastics. In addition to the intrinsic safety of the circuit board and enclosure materials, low resistivity plastics are used so that static electricity does not accumulate on any surfaces. Even though all these precautions are taken and accounted for by the various testing entities, we also include a bonding (grounding) strap for all our gauging thermometers. Pumping action in a tank or sloshing in a marine vessel can cause a difference in electrical potential between the liquid product and external objects. For this reason, the bonding strap should always be used before any objects are inserted into a vessel containing flammable contents.
Depending on the particular model, ThermoProbe instruments have been tested and designated to be Intrinsically Safe by the standards of Europe, North America, Japan, and international organizations. Please review the product data sheet for the specific safety markings.
To ensure that ThermoProbe correctly makes intrinsically safe thermometers, we maintain a recognized quality plan that is periodically audited to oversee our manufacturing method.
ThermoProbe’s petroleum gauging thermometers use probe cable with a non-stick outer jacket that is extremely resistant to melting and chemical damage. Despite the good properties of the non-stick material, it can accumulate static electricity like other plastics. To minimize the accumulation of static on the cable, we have the non-stick jacket impregnated with an electrically conductive additive.
The instrument enclosures and external hardware are also static dissipating plastic or non-sparking metal material.
All models are equipped with a bonding (grounding) cord and clip to ensure that any electric potential is neutralized. The bonding clip should always be attached to a bare metal point (with continuity to the vessel) before using the instrument. This procedure should be followed before anything enters into a vessel of flammable material.