S120 with a Stem and Plastic Connection Head

These resistance-type temperature sensors are intended for contact temperature measurements of liquid or gaseous substances. The plastic connection head is provided with a cable outlet ending (the terminal board is placed in the connection head) or a connector. 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 temperature sensor variant with welded thread is ideal for direct measuring of mediums in ducts. The standard operating temperature range is -30 to 150 °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. Easy mounting of the temperature sensor is ensured by the unique “S head” design invented by SENSIT s.r.o.

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

Specification

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

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

Sensor type
(K - with connector)		 NS 520
NS 520K		 NS 720
NS 720K		 Note
Type of sensing element Pt 1000/3850 Pt 1000/3850
Output signal 4 to 20 mA 0 to 10 V
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 		-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
Power supply (U) 11 to 30 VDC 15 to 30 VDC Recommended value 24 VDC
Load resistance Rs 150 Ω for power supply 12 VDC
700 Ω for power supply 24 VDC 		> 10 kΩ
Output signal - sensing elements break > 24 mA > 10.5 V
Output signal - sensing element short < 3.5 mA ~ 0 V

**)According to the customer‘s requirement, it is possible to provide a customized measuring range from -40 to 150 °C; the minimum span of the range must be 35 °C (e.g. -20 to 15 °C; -30 to 80 °C)

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
Measuring error for NS 520(K), NS 720(K) < 0.6 % of the measuring range, minimum 0.5 °C
NS 840(K) 0.5 °C for range with a span < 100 °C, < 0.6 % of the range with a span > 100 °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
Type of connector in the head - sensors with connector RSFM4 - Lumberg
Insulation resistance > 200 MΩ at 500 V DC, 25° ± 3 °C; humidity < 85 %
Ingress protection IP 65 inaccordance with EN 60529
Material of the sensor stem stainless steel DIN 1.4301
Material of connection head POLYAMIDE
Operating conditions
ambient temperature:
-30 to 100 °C; -30 to °C 80 °C with a converter; -30 to 70 °C with frequency output
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

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