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Hydroprop Flow Meter: Utilizing Compact Impeller Rods for Hydrological Stream Velocity Fieldwork Surveys
Quick Answer
Silver Automation Instruments supplies hydroprop flow meter systems for hydrological stream velocity fieldwork surveys. The compact impeller rod design measures water velocity from 0.03 m/s to 6 m/s in shallow creeks and deep river cross sections. Send your survey depth, velocity range, and data logger protocol for a model fit quote.
Why Field Teams Choose a Hydroprop Flow Meter with Compact Impeller Rods
Hydrology crews often work in remote locations. They carry equipment over rough terrain. The hydroprop flow meter with compact impeller rods reduces total weight without losing measurement range. The rods install quickly and work well in streams with rocks, reeds, or uneven beds.
Most engineers skip this part. The key benefit is repeatable velocity data. A compact impeller rod sensor sits at a known depth. The operator records velocity at multiple points across the channel. That data feeds discharge calculations based on ISO 748. We have seen this on customer sites in Vietnam, Peru, and the Philippines.
What the Compact Impeller Rod Setup Measures in the Field
The hydroprop flow meter measures point velocity in open channels, rivers, and streams. The impeller rotates when water moves past it. The sensor converts rotation into a signal. The rod length sets the measuring depth. Standard rod lengths are 1.5 m, 2.0 m, and 3.0 m. The compact design allows single person operation in shallow water.
The Silver Instruments HP-100 hydroprop flow meter covers a velocity range of 0.03 m/s to 6 m/s. Resolution is 0.001 m/s. Accuracy is plus or minus 1 percent of reading or plus or minus 0.005 m/s, whichever is greater. The sensor body is stainless steel 316 or carbon fiber composite. The connector is IP67. The sensor head is IP68.
Recommended Model and Typical Specifications
We recommend the Silver Instruments HP-100 compact impeller rod hydroprop flow meter for hydrological surveys. The standard configuration includes a 2 m rod, impeller sensor, 10 m cable, and a handheld display. Longer cable lengths of 20 m or 50 m are available.
Output options include pulse, 4-20 mA HART, and Modbus RTU. Power supply is 9 to 28 V DC. Operating temperature is 0 to 45 °C. Storage temperature is minus 10 to 60 °C. The rod sections use quick lock rings. Field replacement takes less than five minutes.
For full pipe flows, we also supply electromagnetic flow meters and ultrasonic flow meters. For stream velocity surveys, the hydroprop flow meter is the direct fit.
Field Deployment Scenarios
Last year a customer in Vietnam asked us for a 2 m rod for a mangrove creek survey. The team needed a sensor that could handle saline water and soft mud. They used the HP-100 with a stainless steel sensor body. The pulse output connected to a portable data logger. The crew completed velocity profiles at twelve stations in one morning.
A hydrology office in Peru used three rod lengths to m
In the Philippines, a drainage contractor checked open channel velocity before installing a pump station. The compact impeller rod fit under a low bridge where a full size current meter could not deploy. They captured velocity data at 0.2, 0.4, and 0.8 times the depth. That matched the local regulatory requirement.
Output Integration with Data Loggers and SCADA
The hydroprop flow meter output must match the field data system. The HP-100 supports pulse output for simple counters. The HP-100 also supports 4-20 mA HART for process signal integration. Modbus RTU is an option for SCADA or telemetry. Before ordering, check the data logger protocol and cable length.
Here is the thing. Many field loggers have a weak pull up resistor on pulse inputs. Check the signal type before you leave the office. Because many crews work in remote areas, low power draw matters. The HP-100 consumes less than 1 W. A small 12 V battery bank can run the sensor and a logger for several days of continuous sampling.
What to Send for a Quote
Do not send a generic inquiry. Send your channel width, water depth range, expected velocity, water quality, cable length, and data logger protocol. Also tell us if the sensor will be used in saline water or in water with heavy sediment. We will match the rod length, sensor material, and output signal.
Contact Silver Instruments. Tel: +86-25-68650347. WhatsApp: +86-25-52155837. WeChat: +86 15365082610. Website: flow-meter.com.au.
Frequently Asked Questions
What is a hydroprop flow meter?
A hydroprop flow meter is a point velocity sensor with a rotating impeller. It measures stream velocity in open channels, rivers, and creeks. Hydrologists use it to build discharge calculations in the field.
Which rod length do I need for my survey?
Use a 1.5 m rod for shallow creeks and small drainage channels. Use a 2.0 m rod for general river surveys. Use a 3.0 m rod for deeper sections or when you need to sample at multiple depths.
Can the hydroprop flow meter connect to a data logger?
Yes. The HP-100 supports pulse output, 4-20 mA HART, and Modbus RTU. Check the data logger input type before ordering. We can include the correct cable length and connector.
What is the accuracy of the compact impeller rod sensor?
The accuracy is plus or minus 1 percent of reading or plus or minus 0.005 m/s, whichever is greater. The velocity range is 0.03 m/s to 6 m/s. Resolution is 0.001 m/s.
How do I order a hydroprop flow meter from Silver Instruments?
Send your survey depth, expected velocity range, water quality, cable length, and data logger protocol by WhatsApp or WeChat. We provide a model fit and a quote within one business day.
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