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Hazardous area sensors
The following products or series are intrinsically safe or have an intrinsically safe option. |
| 376E/CC726E Intrinsically Safe accelerometer and charge amplifier system High temperature vibration sensor |
| 780A compact accelerometer Full size performance in a compact sensor |
| 786A standard accelerometer General purpose vibration sensor |
| 786F accelerometer with integral cable General purpose vibration sensor |
| 786T low cost accelerometer with internal temperature sensor General purpose, dual output vibration and temperature sensor |
| 787A standard accelerometer, side exit General purpose vibration sensor |
| 793 premium accelerometer General purpose vibration sensor |
| 793L premium accelerometer Low frequency vibration sensor |
| 793V / 793V-5 general purpose velocity output sensor Piezovelocity transducers (PVT™) |
| 797 premium accelerometer, side exit General purpose vibration sensor |
| 797L premium accelerometer, side exit Low frequency vibration sensor |
| 797V premium velocity sensor, side exit Piezovelocity transducer (PVT™) |
| PC420 Explosion proof acceleration LPS™ PC420Ax-yy-Ex, top exit 4-20 mA loop powered sensor |
| PC420 Explosion proof velocity LPS™ PC420Vx-yy-Ex, top exit 4-20 mA loop powered sensor |
| PC420 Intrinsically safe acceleration LPS™ PC420Ax-yy-IS, top exit 4-20 mA loop powered sensor |
| PC420 Intrinsically safe velocity LPS™ PC420Vx-yy-IS, top exit 4-20 mA loop powered sensor |
| PC421 Acceleration LPS™ PC421-Axx-yy, side exit loop powered sensor |
| PC421 Velocity LPS™ PC421-Vxx-yy, side exit loop powered sensor |
| PC423 Acceleration LPS™ PC423-Axx-yy, side exit loop powered sensor with integral cable |
| PC423 Velocity LPS™ PC423-Vxx-yy, side exit loop powered sensor with integral cable |
UNITED STATES — FACTORY MUTUAL (FM)
Division 1, Classes I, II, III, Groups A, B, C, D, E, F, and G
In the United States, Article 500 of the National Electrical Code (NFPA 70) defines the following divisions:
Division 1 Hazardous concentrations of flammable gases, vapors—or combustible dusts in suspension—continuously, intermittently, or periodically present under normal conditions.
Divsion 2 Volatile flammable liquids or gases are present, but are normally confined within closed containers or the flammable vapors are normally prevented by positive mechanical ventilation and from which they can escape only under abnormal operating or fault conditions. Combustible dusts are not normally, nor likely, to be thrown into suspension.
Following are typical flammable gases, vapors, mists and ignitable dusts, fibers and filings. They are classified according to the spark energy required to ignite the most easily ignitable mixture with air.
- Class I
- Group A Acetylene
- Group B Hydrogen
- Group C Ethylene
- Group D Propane
- Class II
- Group E Conductive Dust (metal dusts)
- Group F Carbonaceous Dust (coal dusts)
- Group G Non-Conductive Dust (grain dusts)
- Class III
- Fibers
- Flyings (material larger than dust that are not normally in suspension in air)
CANADA — CANADIAN STANDARDS ASSOCIATION (CSA)
Division 1, Class I, Groups A, B, C, and D
In Canada, Section 18 of the Canadian Electrical (Code C22.1), the standards are similar in concept to the United States standards although different procedures are used to match a barrier to a hazardous area instrument.
UNITED KINGDOM & EUROPE
Zones 0-2, Groups I, IIA, IIB, IIC
In Europe, CENELEC standard EN 50 014 defines the following zones:
- Zone 0 Hazardous gas atmosphere is continuously present or is present for long periods of time (ia apparatus only)
- Zone 1 Hazardous gas atmosphere is likely to occur during normal operation (ia or ib apparatus only)
- Zone 2 Hazardous gas atmosphere is not likely to occur during normal operatings, or will only occur for short periods of time (ia or ib apparatus only)
Following are typical flammable gases, vapors, and mists. They are classified according to the spark energy required to ignite the most easily ignitable mixture with air.
- Group IIC Acetylene, Hydrogen
- Group IIA Propane
- Group IIB Ethylene
- Group I Methane (firedamp)
AUSTRALIA—SAFETY IN MINE TESTING & RESEARCH STATION
Zones 0-2, Groups I, IIA, IIB, IIC
In Australia, the standards are similar in concept to the European CENELEC standard EN 50 014, which defines the following zones:
- Zone 0 Hazardous gas atmosphere is continuously present or is present for long periods of time (ia apparatus only)
- Zone 1 Hazardous gas atmosphere is likely to occur during normal operation (ia or ib apparatus only)
- Zone 2 Hazardous gas atmosphere is not likely to occur during normal operatings, or will only occur for short periods of time (ia or ib apparatus only)
Following are typical flammable gases, vapors, and mists. They are classified according to the spark energy required to ignite the most easily ignitable mixture with air.
- Group IIC Acetylene, Hydrogen Group IIA Propane
- Group IIB Ethylene Group I Methane (firedamp)
FRANCE—INSTITUT NATIONAL DE L’ENVIRONNEMENT INDUSTRIEL ET DES RISQUES
Zones 0-2, Groups I, IIA, IIB, IIC
In Europe, CENELEC standard EN 50 014 defines the following zones:
- Zone 0 Hazardous gas atmosphere is continuously present or is present for long periods of time (ia apparatus only)
- Zone 1 Hazardous gas atmosphere is likely to occur during normal operation (ia or ib apparatus only)
- Zone 2 Hazardous gas atmosphere is not likely to occur during normal operatings, or will only occur for short periods of time (ia or ib apparatus only)
Following are typical flammable gases, vapors, and mists. They are classified according to the spark energy required to ignite the most easily ignitable mixture with air.
- Group IIC Acetylene, Hydrogen Group IIA Propane
- Group IIB Ethylene Group I Methane (firedamp)
