Technical data Proline Prosonic Flow 91
64 Endress+Hauser
10.1.8 Operating conditions: Environment
Ambient temperature range Transmitter
–25 to +60 °C (–13 to +140 °F)
Optional: –40 to +60 °C (–40 to +140 °F)
At ambient temperatures below –20 °C (–4 °F) the readability of the display may be impaired.
Install the transmitter at a shady location. Avoid direct sunlight, particularly in warm climatic
regions.
Sensor Prosonic Flow W
–20 to +80 °C (–4 to +176 °F)
Optional: 0 to +130 °C (–32 to +265 °F)
It is permitted to insulate the sensors mounted on the pipe.
Connecting cable (sensor/transmitter)
Standard (PVC): –20 to +70 °C (–4 to +158 °F)
Storage temperature The storage temperature corresponds to the operating temperature range of the measuring
transmitter and the appropriate measuring sensors and the corresponding sensor cable (see above).
Degree of protection Transmitter
IP 67 (NEMA 4X)
Sensors
IP 67 (NEMA 4X)
Optional: IP 68 (NEMA 6P)
Shock and vibration resistance according to IEC 68-2-6
Electromagnetic compatibility
(EMC)
As per IEC/EN 61326 and NAMUR Recommendation NE 21.
In the frequency operating range of the sensor (1 to 3 MHz), failsafe values up to 5 V do not affect
the measured values.
10.1.9 Operating conditions: Process
Medium temperature range Flowrate measuring sensors Prosonic Flow W (clamp-on):
–20 to +80 °C (–4 to +176 °F)
Optional: 0 to +130 °C (+32 to +266 °F)
Medium pressure range
(nominal pressure)
Perfect measurement requires that the static fluid pressure is higher than vapor pressure.
Pressure loss There is no pressure loss.
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