Impress Sensors

Tel: +44 (0) 118 981 7980

Email:info@impress-sensors.co.uk
You are here : Home » Products » SIL2 Approved Products » SIL2 Approved Products

» SIL2 (Safety Integrated Level)

 

The current Safety Integrity Level (SIL) international safety standard provides suppliers and users with a common framework on which to design products and systems for safety related applications. The standard also provides a more scientific, numerical approach to specifying and designing safety systems, enabling the nature of the risk to be quantified.

SIL means risk reduction to a tolerable level. The required safety level of a process plant is classified in accordance with the international IEC 61 511 standard and depends on the risk constituted by a plant. The IEC 61 508 standard describes the requirements of electrical, electronic and programmable electronic devices used in such plants. Both standards subdivide plants and devices into 4 safety levels, from SIL1 for low risks, to SIL4 for very high risks. The allocation to these safety levels is based on the use of a risk graph and depends on:

  • Extent of possible damage
  • Frequency of persons present in hazardous areas
  • Possibility of damage prevention
  • Probability of an unwanted event occurring

The standards also describe the type of risk assessment and procedures for integrating certain safety functions into sensors and plants. Generally, the significant hazards for equipment and any associated control system have to be identified by the specifiers or developers via a hazard analysis. The analysis identifies whether functional safety is necessary to ensure adequate protection against each significant hazard.

Examples within safety related systems for mechanical engineering include auxiliary disconnected systems; fire detector and gas warning systems; monitoring of turbines; safety interlock and auxiliary disconnected systems for machines; devices for medical applications; and remote monitoring based on network, handling and programming of procedural constructions.

DMK 331 - Industrial Pressure Transmitter (SIL2 Approved)

The DMK 331 is for pressure measurement with aggressive media owing to it's ceramic pressure sensor and choice of stainess steel, PVC or PVDF process conenction and housing material.  Pressure ranges from 400mbar through to 600 bar and outputs including 4-20mA or 0-10V, a selection of electrical connections are also available.
123Live Web Design