Hach Flo-Dar, Basic User Manual, Page: 4 / 286

Specification Details
Surcharge depth measurement Method: Piezo resistive pressure transducer with stainless steel
diaphragm
Auto zero function maintains zero error < 0.5 cm (0.2 in.)
Range: 3.5 m (138 in.); overpressure rating: 2.5 × full scale
Velocity measurement Method: Pulsed radar - Doppler
Range: 0.23–6.10 m/s (0.75–20 ft/s)
Frequency Range: EU Models—24.175 GHz ± 15 MHz, US/Canada
Models—24.125 GHz ± 15 MHz
Output Power: EU Models—20 mW (13 dBm) nominal ± 10%,
US/Canada Models—2.5 V/m at 3 meters (maximum field strength)
Accuracy: ±0.5%; ±0.03 m/s (±0.1 ft/s)
Certifications The Flo-Dar transmitter has the wireless certifications that follow:
• European Union (EU): CE mark
• United States (US): FCC ID: VIC-FLODAR24
• Canada: IC: 6149A-FLODAR24
• Brazil: ANATEL: 01552-13-09098
Flow measurement
Method Based on the continuity equation
Accuracy ±5% of reading is typical where flow is in a channel with uniform flow
conditions and is not surcharged, ±1% full scale maximum
Surcharge conditions depth/velocity
Depth (standard with Flo-Dar sensor) Surcharge depth supplied by Flo-Dar sensor
Velocity (with optional surcharge velocity
sensor) Method: Electromagnetic
Range: ±4.8 m/s (±16 ft/s)
Accuracy: ±0.046 m/s (±0.15 ft/s) or 4% of reading, whichever is more
Zero stability: > ±0.015 m/s (±0.05 ft/s) typical
Section 4 General information
In no event will the manufacturer be liable for direct, indirect, special, incidental or consequential
damages resulting from any defect or omission in this manual. The manufacturer reserves the right to
make changes in this manual and the products it describes at any time, without notice or obligation.
Revised editions are found on the manufacturer’s website.
4.1 Safety information
N O T I C E
The manufacturer is not responsible for any damages due to misapplication or misuse of this product including,
without limitation, direct, incidental and consequential damages, and disclaims such damages to the full extent
permitted under applicable law. The user is solely responsible to identify critical application risks and install
appropriate mechanisms to protect processes during a possible equipment malfunction.
Please read this entire manual before unpacking, setting up or operating this equipment. Pay
attention to all danger and caution statements. Failure to do so could result in serious injury to the
operator or damage to the equipment.
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