Device for measuring the temperature in air and non-aggressive gases. Measuring element: resistance thermometer Pt 100, measuring range: -30 °C... +70 °C, response time: 20 s, electrical output: 4 - 20 mA, ambient temperature: -40 °C... +80 °C, load: max. 500 Ohm (for > 20 V DC operating voltage), protection class sensor / electronics: IP30/IP65, operating voltage: 12 - 30 V DC, own power requirement: approx. 5 mA (10 V) / 3 mA (1 V), dimensions: diameter 20 x 138 mm, weight: 0.35 kg, including weather and radiation protection (with fan and 5 m connection cable), including accessories for mounting on mast tube (diameter 30 - 50 mm or larger with supplied pipe clamp), including 5 m cable for electrical connection to the junction box of the basic package.