| Sensor type* | NSD 520(K) | NSD 720(K) |
| Output signal | 4 to 20 mA | 0 to 10 V |
| Type of sensing element | Pt 1000/3850, accuracy class B (± 0.3 + 0.005 x | t | ) in °C | |
| Measuring range | adjustable | |
| Max. measuring range | – 50 to 150 °C | |
| Measuring error | 0.8 % from the range, at least 0.5 °C | |
| Display screen | 4-digit, LED, character dimension 7.62 × 4.22 mm | |
| Power supply (U) | 15 to 30 V DC | |
| Nominal voltage Un | 24 V | |
| Load resistance | Rz ma 250 Ω | Rz min 10 kΩ |
| Current/voltage when the sensor is interrupted | > 24 mA | > 12 V |
| Current/voltage when the sensor is | < 3 mA | ~ 0 V |
| short-circuited | ||
| Material of the head | POLYAMIDE | |
| Dimension of the head | 70 x 63 x 34 mm | |
| Wire cross-section | 0.35 to 1.5 mm2 | |
| Ingress protection | IP 65 in accordance with EN 60529 | |
| Cable connection | Through the grommet M 16 × 1.5 / through the connector LUMBERG M12 | |
| Ambient temperature around the head | -30 to 70 °C | |
| Electric strength | 500 V / 50 Hz in accordance with EN 60730-1 | |
TEMPERATURE SENSORS WITH A STEM AND DISPLAY
These resistance temperature sensors with a stem and display are designed for contact measurement of the temperature of liquid or gaseous substances. The sensors are designed for temperature measurement in air-conditioning ducts and pipes. The temperature sensor is placed in a metal stem with a length of 70 to 420 mm. The plastic head of the temperature sensor with a display is equipped with a cable gland or connector, the measured temperature is indicated on a 4-digit display located under the transparent cover of the head. Temperature sensors with a display can be used for all control systems that are compatible with the output signals listed in the table of technical parameters.
The maximum temperature range for setting the current loop of temperature sensors with display is -50 to 150 °C. The required operating temperature ranges can be programmed within this range, with the minimum difference between the lower and upper limits of the temperature range being 10 °C. The maximum temperature in the vicinity of the head of the temperature sensor with display is -30 to 70 °C and must not be exceeded even for a short time. Temperature sensors with display comply with the IP 65 protection level according to ČSN EN 60529, as amended. Easy installation of temperature sensors with display is ensured thanks to the unique ” S head ” design of SENSIT sro
The sensors are designed for operation in chemically non-aggressive environments; the method of use must be chosen with regard to the temperature resistance of the head and metal housings.