K120 with a Stem and Metal Connection Head

These resistance-type temperature sensors are intended for contact temperature measurements of liquid or gaseous substances. The temperature sensor-central holder combination is suitable for temperature measurements in air condition ducts. The temperature sensor-thermowell combination is suitable for temperature measurements in tubing. The sensor variant with welded thread is ideal for direct measuring of mediums in ducts. The standard operating temperature range is -30 to 200 °C. By using a sensor with a longer stem the upper limit of allowable temperature can be extended up to 250 °C. The temperature sensors can be utilised for any control systems that are compatible with sensing element output signals or output signals quoted in the table of sensing element types.

The temperature sensors are designed to be operated in a chemically non-aggressive environment.

Specification

Sensor type Type of sensing element Maximum measuring DC current Measuring range
NK 120 Ni 1000/5000 1 mA -30 to 200 °C (connection head ambient temperature -30 to 100°C)
NK 121 Ni 1000/6180 1 mA -30 to 200 °C (connection head ambient temperature -30 to 100°C)
NK 122 Ni 891 1 mA -30 to 200 °C (connection head ambient temperature -30 to 100°C)
NK 320 Ni 10000/5000 0.3 mA -30 to 200 °C (connection head ambient temperature -30 to 100°C)
NK 321 Ni 10000/6180 0.3 mA -30 to 200 °C (connection head ambient temperature -30 to 100°C)
NK 123 T1 = Ni 2226 0.7 mA -30 to 150 °C
PTK 120 Pt 100/3850 3 mA - 50 to 200 °c (connection head ambient temperature -30 to 100 °C)
PTK 220 Pt 500/3850 1.5 mA
PTK 320 Pt 1000/3850 1 mA
HK 120 thermistor NTC 20 kΩ 10 mW *) -30 to 150 °C

*) maximum power consumption
Note: x = version A or version B

Sensor type NK 520 Note
Type of sensing element Pt 1000/3850
Output signal 4 to 20 mA
Measuring ranges -50 to 50 °C
-30 to 60 °C
0 to 35 °C
0 to 100 °C
0 to 150 °C
0 to 200 °C
0 to 250 °C 		ambient temperature around the connection head -30 to 70 °C
Error of the measurement < 0.6 % of the range no less than 0.5 °C
Power supply (U) 11 to 30 VDC recommended value 24 VDC
Load resistance 150 Ω for power supply 12 VDC
700 Ω for power supply 24 VDC
Output signal - sensing elements break > 24 mA
Output signal - sensing element short circuit < 3.5 mA

*) Certain technical specifications of thermocouple sensors (lead wires, IP rating, etc.) may differ with different types.
Note: Manufacturer reserves the right to make changes in design and technical characteristics of the products. For actual information, please always contact your dealer.

Others Parametrs
Accuracy class Ni sensing elements: B class, Δt = ± (0.4 + 0.007t), for t ≥ 0; Δt = ± (0.4 + 0.028|t|), for t ≤ 0 in °C;
Pt sensing elements: B class according EN 60751, Δt = ± (0.3 + 0.005|t|) in °C
NTC 20 kΩ: ± 1 °C for the range 0 to 70 °C
Sensor connection according to the wiring diagram
Standard length of stem L1 70, 120, 180, 240, 300, 360, 420 mm
Time response τ0,5 < 9 s (in flowing water at 0.4 m.s-1)
Recommended wire cross section - sensors with the grommet 0.35 to 1.5 mm2
Insulation resistance > 200 MΩ at 500 VDC, 25° ± 3 °C; humidity < 85 %
Ingress protection IP 54 in accordance with EN 60529
Material of the stem stainless steel DIN 1.4301
Type of connection head LIMATHERM MA
Material of connection head aluminium alloy
Operating conditions
ambient temperature:
-30 to 100 °C; -30 to 70 °C with a converter
relative humidity:
max. 100 % (at the ambient temperature 25 °C)
atmospheric pressure:
70 to 107 kPa
Weight approximately 0.15 kg

*) Certain technical specifications of thermocouple sensors (lead wires, IP rating, etc.) may differ with different types.
Note: Manufacturer reserves the right to make changes in design and technical characteristics of the products. For actual information, please always contact your dealer.

Dimensional Draft

Wiring Diagram

Visit our downloads page to view technical characteristics or contact our technical sales department for more information, prices or with your specifications.

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