IFM SA4304 Calorimetric Flow Sensor with 200mm Probe
Brand New
Manufacturer warranty Description
Features:
- Measurement of flow and temperature at the same time
- Optimized for water, oils and air
- Clearly visible numerical display
- With two scalable analog outputs
- 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
- Material Stainless steel (1.4404 / 316L); PBT-GF20; PBT-GF30
- Accuracy ± (7 % MW + 2 % MEW); (for relative mode in the range of maximum sensitivity under the following conditions: ; water: 20 - 70 ° C; inlet length: 1.5 m; DN25 (DIN 2448); mounting position according to instructions; Accuracy can differ for other media and mounting positions.)
- System Gold-plated contacts
- Output Signal Analog signal
- Protection Class III
- Process Connection Diameter Ø 8 mm
- Probe Length (mm) 200
- Operating Mode Relative; absolutely liquid; 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 0,05 m/s; (water; Flow velocity: 0,05 - 3 m/s)
- Short-circuit protection Yes
- Operating voltage [V] 18 - 30 DC
- Media Water; glycol solutions; air; oils
- 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] 180
- Weight [g] 312.5
- Number of Inputs and Outputs Number of Analog Outputs: 2
- Medium Temperature [° C] -20 - 100
- Total Number of Outputs 2
- Number of Analog Outputs 2
- Materials (Wetted Parts) Stainless steel (1.4404 / 316L)
- Power-on Delay Time [s] 10
- Response Time [s] 0.5; (T09; water; glycol: 0,8 s; air: 7 s; oil: 1,8 s; each T09)
- Pressure Rating [bar] 50
- Pressure Rating [MPa] 5
- MAWP (for Applications According to CRN) [bar] 50
- Measuring Range [° C] -20 - 100
- Resolution [° C] 0.2
- In Steps of [° C] 0.2
- Accuracy [K] ± 0,3 / ± 1; (water; Flow velocity: 0,3 - 3 m/s / air; Flow velocity: >10 m/s)
- Dynamic Response T05 / T09 [s] 1,5 (T09); (water; Flow velocity: 0,3 - 3 m/s)
- Parameter Setting Medium selection; Damping; Teach function; display can be rotated and switched off; standard unit of measurement; process value color
- Type of Short-Circuit Protection Yes (non-latching)
- Analog Start Point [° C] -20 - 76
- Analog End Point [° C] 4 - 100
- Probe Length L [mm] 200
- Temperature Drift [cm/s x 1/K] 0,003 m/s x 1/K (<20 ° C; >70 ° C)
- Maximum Temperature Gradient of Medium [K/min] 100
- Setting Range [m/s] 0 - 100, 0 - 200, 0.04 - 3, 0.04 - 6
- Greatest Sensitivity [m/s] 0.04 - 3, 30 - 100
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