IFM SA5020 Calorimetric Flow Sensor with 45mm Probe and 1 Outputs
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Manufacturer warranty Description
IFM, SA5020, Calorimetric Flow Sensor with 45mm Probe and 1 Analog Outputs
Features:
- Measurement of flow and temperature at the same time
- Reliable airflow monitoring
- Red/green display for clear identification of the acceptable range
- With switching output, analog signal and IO-Link
- The process connection can be rotated for optimum alignment
Calorimetric principle of operation
Thermal flow sensing technology relies on the cooling effect of flowing liquids. A higher flow velocity results in a greater cooling effect and this can be reliably measured. The images below depictheat being conducted from the sensor tip by a flowing liquid.
The sensor tip houses two platinum RTD elements and a heat source. When power is applied, the tip of the sensor is heated. The difference in temperature between the two RTDs is held constant (Δ 4 ° C) by varying the amount of power applied to the heater. The flow rate is determined as these RTDs react to the physical effect of a flowing medium conducting heat energy away from the sensor tip.
This temperature-based operating principle can reliably sense the flow of virtually any liquid or gas. The general rule of thumb is “ if the medium is pumpable, the flow is detectable.”
The flow measurement is in units of velocity (ft/sec) and it is measured at a single point in the pipe. When the pipe size is known, velocity can be calculated in units of volumetric flow rate (gpm, lpm, etc.) by multiplying the velocity by the cross-sectional area of the pipe.
For more information, please see 
Data Sheet
Technical details
- Number of Outputs 1
- Material Stainless steel (1.4404 / 316L); stainless steel (1.4310 / 301); PBT-GF20; PBT-GF30
- Accuracy ± (10 % MW + 2 % MEW); (reference conditions: DN50; Inside diameter 51 mm; within the range of maximum sensitivity: 20 ° C /<6 bar; Insertion depth: 15 mm; inlet pipe length: 2.5 m; standard velocity to DIN ISO 2533 at the sensor tip)
- System Gold-plated contacts
- Output Signal Switching signal; analog signal; frequency signal; IO-Link; (configurable)
- Communication Interface IO-Link
- Protection Class III
- Number of Digital Outputs 2
- Installation Recommended for pipe diameters; ( 15 - 51 mm)
- Process Connection Threaded connection M18 x 1,5 Internal thread
- Output Function Normally open / closed; (configurable)
- Probe Length (mm) 45
- Electrical Design PNP/NPN
- Operating Mode Relative; absolutely gaseous; (absolute: reference measurement recommended; Factory Setting: relative)
- Protection IP 65 IP 67
- Connection Connector: 1 x M12; coding: A; Contacts: gold-plated
- Overload Protection Yes
- Repeatability ± (3 % MW + 0,6 % MEW)
- Short-circuit protection Yes
- Operating voltage [V] 18 - 30 DC; (to SELV/PELV)
- Media Air
- Temperature Drift ± 0,005 K/° C
- Reverse Polarity Protection Yes
- Current Consumption [mA] < 100
- Analog Current Output [mA] 4 - 20; (scalable)
- Maximum Load [Ω ] 350
- Ambient Temperature [° C] -40 - 80
- Storage Temperature [° C] -40 - 100
- MTTF [Years] 131
- Weight [g] 309.1
- Medium Temperature [° C] -20 - 90
- Total Number of Outputs 2
- Number of Analog Outputs 1
- Materials (Wetted Parts) Stainless steel (1.4404 / 316L); Gasket: FKM
- Maximum Voltage Drop Switching Output DC [V] 2.5
- Power-on Delay Time [s] 10
- Response Time [s] 7
- Pressure Rating [bar] 100
- Pressure Rating [MPa] 10
- Permanent Current Rating of Switching Output DC [mA] 250
- MAWP (for Applications According to CRN) [bar] 100
- Frequency of the output [Hz] 0 - 1000
- Frequency at the end point FRP [Hz] 100 - 1000
- Measuring Range [° C] -20 - 90
- Resolution [° C] 0.2
- Accuracy [K] ± 2 / + 8; (flow velocity>20 % VMR and 20 ° C: ± 2)
- Dynamic Response T05 / T09 [s] 30 (T09); (Flow velocity: ≥ 10 m/s)
- Parameter Setting Hysteresis / window; normally open / closed; switching logic; current/frequency output; medium selection; Damping; Teach function; display can be rotated and switched off; standard unit of measurement; process value color
- Transmission Type COM2 (38,4 kBaud)
- IO-Link Revision 1.1
- SDCI Standard IEC 61131-9
- Profiles Smart Sensor: Process Data Variable; Device Identification, Device Diagnosis
- SIO Mode Yes
- Required Master Port Class A
- Process Data Analog 2
- Process Data Binary 2
- Minimum Process Cycle Time [ms] 3
- Type of Short-Circuit Protection Yes (non-latching)
- Probe Length L [mm] 45
- Setting Range [m/s] 0 - 30, 0 - 60
- Greatest Sensitivity [m/s] 0.6 - 30
- Display range [m/s] 0 - 36
- Resolution [m/s] 0.2
- Set point SP [m/s] 2 - 30
- Reset point rP [m/s] 0.6 - 28.6
- Analog start point ASP [m/s] 0 - 24
- Analog end point AEP [m/s] 6 - 30
- Frequency end point, FEP [m/s] 6.6 - 30
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