Micropilot FMR20 HART
Endress+Hauser 7
Input
Measured variable
The measured variable is the distance between the reference point and the product surface.
The level is calculated based on E, the empty distance entered.
Measuring range Maximum measuring range
• Device with 40 mm (1.5 in) antenna: 15 m (49 ft)
2)
• Device with 80 mm (3 in) antenna: 20 m (66 ft)
Installation requirements
• Recommended tank height > 1.5 m (5 ft) for media with low ε
r
value
• Open channel minimum width 0.5 m (1.6 ft)
• Calm surfaces
• No agitators
• No buildup
• Relative dielectric constant ε
r
> 4
Contact Endress+Hauser for lower ε
r
values
Usable measuring range
The usable measuring range depends on the antenna size, the medium's reflective properties, the
installation position and any possible interference reflections.
Media groups
• ε
r
= 4 to 10
e.g. concentrated acid, organic solvents, ester, aniline, alcohol, acetone.
• ε
r
> 10
e.g. conductive liquids, aqueous solutions, diluted acids and bases
Reduction of the maximum possible measuring range by:
• Media with bad reflective properties (= low ε
r
value)
• Formation of buildup, particularly of moist products
• Strong condensation
• Foam generation
• Freezing of sensor
Operating frequency
K-band (~ 26 GHz)
Transmission power
Mean power density in the direction of the beam
• At a distance of 1 m (3.3 ft): < 12 nW/cm
2
• At a distance of 5 m (16 ft): < 0.4 nW/cm
2
Output
Output signal 4 to 20 mA
An 4 to 20 mA interface is used for measured value output and to power to the device.
Digital output HART®
• Signal encoding; FSK ±0.5 mA over current signal
• Data transmission rate;1 200 Bit/s
Bluetooth® wireless technology (available as an optional extra)
The device has a Bluetooth® wireless technology interface and can be operated and configured via
this interface using the SmartBlue app.
2) order code 010 (approval) "GA", "GB", "GR": 10 m (32.8 ft)
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