Yokogawa's YTA series temperature transmitters have been certified by TUV NORD, a product quality certification organization in Germany, as being compliant with the requirements of the IEC61508 international safety standard for Safety Integrity Level (SIL). The YTA series has been certified to reduce the risk factor for a plant to a range of 1/100 to 1/1,000. When combined with a safety-instrumented system, they can enhance plant safety.