Degree Of Protection; Shock And Vibration Resistance; Operating Conditions: Process; Medium Temperature Range - Endress+Hauser Proline Prosonic Flow 91W Technical Information

Proline Prosonic Flow 91W

Degree of protection

Shock and vibration resistance

Medium temperature range

Medium pressure range
(nominal pressure)

Pressure loss

Energy Measurement

Endress+Hauser
Transmitter
IP 67 (NEMA 4X)
Sensors
IP 67 (NEMA 4X)
Optional: IP 68 (NEMA 6P)
according to IEC 68-2-6

Operating conditions: process

–20 to +80 °C (–4 to +176 °F)
Optional: 0 to +130 °C (32 to +265 °F)
Perfect measurement requires that the static fluid pressure is higher than vapor pressure, to avoid outgasing.
There is no pressure loss.
The Prosonic Flow 91W Ultrasonic is well suited for making or retrofitting energy measurement for hot or
chilled water systems - often used in conjunction with Endress+Hauser Flow and Energy Manager
RMC621/RMS621.
The quantity of heat is calculated from the process variable for flow and the differential from the feed and return
temperature. Energy Manager can also determine the quantity of heat in water flow from process variable flow
and a single temperature measurement.
Installation of delta heat measurement
• Temperature measurement takes place via two separate sensors which are directly connected to the
Endress+Hauser Energy Manager. (Temperature sensors and Energy Manager supplied separately).
• The Prosonic Flow 91W can be installed on either the hot or cold side of the heat exchanger.
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Layout for delta heat measurement of hot or chilled water system
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