This product appears in the ERE Water Catalogue 2026
Rolls-Royce
Bureau Veritas
Renouveau La Fontaine
Englobe
National Defence
Government of QuébecOverview
The FP111, FP211 and FP311 Flow Probes are highly accurate water velocity instruments for measuring flows in open channels and partially filled pipes. The water velocity probe consists of a protected water turbo prop positive displacement sensor coupled with an expandable probe handle ending in a digital readout display. The water flow meter incorporates true velocity averaging for the most accurate flow measurements.
Features
• Records 30 data sets, and readings are in feet or meters per second
• Telescoping handles ranging from 3 feet to 14 feet
• Rain-proof digital computer and display with 5-year shelf life
• Light weight, rugged and reliable
Applications
• Storm-water runoff studies
• Sewer flow measurements
• Measuring flows in rivers and streams
• Monitoring water velocity in ditches and canals
| Model | FP111 | FP211 | FP311 |
| Range | 0.3 - 19.9 FPS (0.1 - 6.1 MPS) | 5.5 to 14 ft | 2.5 to 5.5 ft |
| Accuracy | 0.1 FPS | 3 lbs | 2.8 lbs |
| Averaging | True digital running average, updated once per second | ||
| Display | LCD, Glare, and UV Protected | ||
| Control | 4 button | ||
| Datalogger | 30 sets, MIN, MAX, and AVG | ||
| Features | Timer, Low battery warning | ||
| Sensor Type | Protected Turbo-Prop propeller with magnetic pickup | ||
| Instrument Weight | 2 lbs (0.9 kg) | 3 lbs (1.4 kg) | 2.8 lbs (1.3 kg) |
| Shipping Weight | 13 lbs (5.9 kg) | 23 lbs (10.4 kg) | 19 lbs (8.6 kg) |
| Expandable Length | 3.7 to 6 ft (1.1 to 1.8 m) | 5.5 to 14 ft (1.7 to 4.3 m) | 2.5 to 5.5 ft (0.76) |
| Materials | Probe: PVC and anodized aluminum with stainless steel water bearing Computer: ABS/Polycarbonate housing with polyester overlay | ||
| Power | Internal Lithium Battery, approx. 5 years life with typical use, non-replaceable | ||
| Auto Shutoff | After 5 minutes of inactivity | ||
| Operating Temperature | -4 °F to 158 °F (-20 °C to 70 °C) | ||
| Storage Temperature | -22 °F to 176 °F (-30 °C to 80 °C) | ||
| Carrying Case | The Flow Probe is shipped in a carrying case | ||
| Certificates | CE | ||
*Please note that Swoffer does not supply the cable, reels or weights required for operation
Compare models
Your selection is highlighted. Select a row to switch.| Part Number | Description | Model | Includes |
| GW-BA1100 | 3.7 to 6 ft. Handle | FP111 | Carrying Case |
| GW-BB1100 | 5.5 to 15 ft. Handle | FP211 | Carrying Case |
| GW-BC1100 | 2.5 to 5.5 ft. Handle Piece Pole | FP311 | Carrying Case |
| GW-BB1110 | 5 to 14 ft. Probe With Swivel Head | FP211-S | Carrying Case |
| GW-BA1110 | 3 to 6 ft. With Swivel Head | FP111-S | Carrying Case |
Documents
Calibration and repair
Send it to our Montreal service team. We evaluate the instrument and send a detailed quote before any work starts.
Questions, answered
How fast will I get a price?
Send the quote request and a specialist replies within 4 business hours, Monday to Friday, 8:00 to 4:30 ET.
Can we pay on account or by purchase order?
Yes. With established credit, terms are Net 30 days, and you can send your purchase order with the quote request. We also accept Visa, Mastercard and American Express.
How is shipping charged?
On quotes and account orders, freight is F.O.B. Montréal: the carrier charge is worked out at shipment from the packed weight and dimensions, and added to your invoice. In-stock items can also be picked up the same day in Montréal (8605 rue du Champ-d'Eau).
Can I return it?
Yes, within 30 days of purchase, with a return authorization number from customer service first. A 25% restocking fee applies, unless it is a defect covered by the warranty. Special orders, hazardous materials, flammable liquids and gases can't be returned. Return policy
Can ERE calibrate or repair it?
Yes. Our Montréal service shop calibrates and repairs it in-house. Request service