Hach 911 User Manual page 8

Specifications
Operating Frequency
Beam Angle
Accuracy
Range
Operating Temperature
Temperature Error
Resolution
Material
Cable Length
Dimensions
When the sensor is out of the water, the system may report velocity readings of up to 0.76 m/s due to radio
1
frequency and interferences at frequencies of 140
2
For temperatures above 40 °C (104 °F) add ± 0.3 cm/°C (0.03 in./°F)
6
Table 2 940 Flow Meter Specifications (continued)
75 kHz
5°
±15.24 cm or 3.048 m ±0.003 m (±0.01 ft), at 22 °C (72 °F), still air, 40–70% relative humidity,
from 6 in. to 10 ft
10 ft
–18 to 60 °C (0 to 140 °F)
0.00005 m/°C (0.0001 ft/°F) (maximum error with compensated temperature range—per degree
of change.
0.019 cm (0.0075 in.)
ABS housing with ABS acoustical window
7.62 to 30.48 m (25 to 100 ft)
15.24 cm x 5.7 cm (6 in. x 2.25 in.)
–
170 MHz and 300 MHz with field strengths greater than 3 V/m.