Thermal Mass Flow / consumption sensor
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CS-iTEC Thermal Mass Flow / consumption sensor S 452

The CS-iTEC flow sensor S 452 is based on the thermal mass flow principle. It measures volumetric standard flow over a wide measuring range and compressed air consumption . The result is pressure and temperature independent.

S 452 is designed specifically for harsh environments. The NEMA 4X enclosure with IP67 allows all-weather applications, All parts which come into contact with the measurement medium are made of stainless steel 316L. This allows applications in pharmaceutical and food industry, but also the measurement of corrosive and contaminated gas. Installations in explosive environment can be done through the optional ATEX approval. Various gases can be measured such as air, oxygen, argon, carbondioxyde, natural gas, hydrogen, methane, etc. Basically any gas mixture can be measured as long the mixing ratio and its components are known and constant.

The modern factory world instrumentation requires interfaces to factory automation system.

CS-iTEC flow sensor not only supporting the traditional 4-20 mA outputs and pulse outputs, but also fieldbus interface for HART, Modbus and M-Bus. Since the meters are based on a modular design other fieldbus can be adopted easily. The optional Display showing flow rates, consumption, medium temperature and diagnostic results.


CS-iTEC provides practical, state-of-the-art, high-quality thermal mass flow meters for gas flow applications such as

  • Compressed air flow and distribution
  • Airflow and distribution of process gases like Carbon dioxide, Argon, Nitrogen, Oxygen
  • Explosive gases like natural gas, hydrogen, bio gas
  • Corrosive gases like bio gas
  • Fuel and air supply to burners, boilers, industrial furnaces
  • Air flow in chillers
  • Dosing and gas injection control

Product features

  • Direct measurement of mass flow and standard flow without the need of pressure compensation
  • Wide range of tube sizes are supported with insertion type for big pipe diameters and in line types for small pipe diameters
  • No moving parts, non clogging
  • All parts which come into contact with the measurement medium are made of stainless steel 316L
  • Robust metal enclosure suitable for out-door applications in harsh environment
  • Wireless Bluetooth interface for sensor settingson ambient site
  • Display showing flow rates, consumption, meduim temperature and diagnostic results
  • 2 analogue outputs (4-20 mA) and 1 pulse output
  • Available options:
  • Fieldbus interface: HART, MODBUS, M-BUS
  • Hazardous approval ATEX: II 2 G Ex d IIC T4
  • 2-directional measurement
  • Flow conditioning

Technical data

Measuring range 0.4…92.7 sm/s *(standard range calibration)
0.8 … 185 sm/s *(max range calibration)
(refer to table for flow measurement ranges in different tube diameters)
*sm/s: standard meter per second
Accuracy ±(1.5% of reading + 0.3% full scale)
Stated accuracy at Ambient/process temperature 23 °C± 3°C
Ambient/process humidity < 90 %, no condensation
Process pressure at 0.6 MPa
Repeatability 0.25% of reading
Response time t95 <5 seconds
Sampling rate Display and outputs are refreshed every 200 msec
Tube diameter Insertion type: DN25 … DN1500
In line type: DN15 … DN80
Process connection Insertion type: ½” G type thread(ISO 228-1)
In line type: R thread(ISO 7-1), Flange EN 1092-1,ANSI /B16.5, JIS B2220
Measuring medium Any gas where the components and the mixing ration are constant and known.
See order information for a list of standard gases
Operating temperature -40 … +150 °C (medium temp. insertion type)
-40 … +100 °C (medium temp. in line type)
-40 … +65 °C (ambient temperature)
Operating pressure 1.6 MPa (insertion type)
4.0 MPa (in line type)
Analogue output 2 x 4 … 20 mA, up to 400 R load, active/passive selectable, measurement channel selectable, scaling programmable
Pulse/Alarm output Either alarm or pulse output. 1 pulse per 1,10 or 100 consumption units, Alarm programmable
Power supply 16-30 VDC, 5 W
Enclosure IP 67
Sensor material Stainless steel 1.4404 (SUS 316L)
Approvals CE, RoHS
ATEX : II 2 G Ex d IIC T4 / GB3836 / IECEx (Optional)
Fieldbus (Optional) MODBUS
Configuration interface CS-Service kit
Volumetric flow ranges
Inch DN Di[mm] S-Rang [m³/h] M-Range [m³/h] HS-Range [m³/h]
1/2″ DN15 16.1 0.2~45.6 0.4~91.0 0.48~110.16
3/4″ DN20 21.7 0.4~89.1 0.9~177.8 1.09~215.3
1″ DN25 27.3 0.7~147.7 1.5~294.7 1.82~356.85
1¼” DN32 36.0 1.3~266.3 2.6~531.5 3.15~643.51
1½” DN40 41.9 1.8~366.7 3.6~731.9 4.36~886.18
2″ DN50 53.1 3.0~600.1 6.0~1197.6 7.26~1450.04
2½” DN65 68.9 5.0~1026.5 10~2048.6 12.1~2480.44
3″ DN80 80.9 7.0~1424.4 14~2842.7 16.94~3441.91
4″ DN100 100.0 10~2183.3 20~4357.2 24.2~5275.71
5″ DN125 125.0 20~3419.6 38~6824.4 45.9~8263.09
6″ DN150 150.0 29~4930.1 58~9838.9 70.18~11913.10
8″ DN200 200.0 43~8785.6 88~17533.3 106.48~21229.51
10″ DN250 250.0 69~13743.9 137~27428.5 165.77~33210.69
12″ DN300 300.0 99~19814.8 198~39544.1 239.58~47880.39

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