Hach Flo-Dar Sensor Basic User Manual page 12

Figure 6 Sensor location near a junction
1 Acceptable upstream sensor location
2 Acceptable downstream sensor location
5.1.2 Install the sensor
Explosion hazard. In hazardous locations, friction between surfaces can generate sparks that can
cause an explosion. Make sure that no friction is possible between the instrument and any surrounding
surfaces.
Potential hearing loss risk. Hearing protection required. The level transducer emits ultrasonic sound
energy when powered. Ear protection must be worn when working within 1 meter of this device. Do not
point the transducer output towards ears during installation, calibration and maintenance.
Ultrasonic pressure:
• Dimensions of useful beam: Long range
• Ultrasonic pressure: > 110 dB at 1 m (3.3 ft) on axis
• Sound pressure inside beam: 111.9 dB maximum
Mount the Flo-Dar sensor above the open channel on the wall of the manhole. For hazardous
locations, a barrier must be installed outside of the hazardous area.
For temporary installation, an optional Jack-bar is available. Instructions are supplied with the Jack-
bar.
The sensor dimensions are shown in
The dimensions of the standard frame for wall installation are shown in
12 English
3 Distance downstream: 10 × pipe diameter
4 Distance upstream: 5 × pipe diameter
W A R N I N G
C A U T I O N
Figure 7 and Figure 8.
Figure 9.