📊 FlowVis Digital Flow Meter – Complete System

NSF 50 Level 1 Certified Precision Flow Measurement with Remote Digital Display & Pool Turnover Rate Functionality 🎯

📋 Product Overview

The FlowVis Digital is the most advanced upgrade to the renowned FlowVis flow meter family. By adding digital functionality to the already unrivaled accuracy and flexibility of FlowVis, users experience greater functionality, ease of use, and precision. The unique Pool Turnover Rate feature and ability to set flow rate alarms further enhance the industry’s most respected flow meter.

FlowVis Digital employs a patented electronic design to accurately measure flow rate. The remote digital display, housed in a NEMA 4X corrosion-proof enclosure, shows flow rate in both numeric value and bar-graph format. This solves the problem of difficult-to-read installations by allowing the display to be mounted in a user-accessible location.

The Digital upgrade eliminates parallax error issues when reading the standard FlowVis. Using Advanced Setup features, FlowVis Digital can interface with heaters, chemical feeders, and UV units so they operate only above a user-defined flow rate. The 4-20mA output can be interfaced to Variable Frequency Drives for constant flow control.

⭐ Key Features

✅ NSF 50 Level 1 Certified – Independently certified accuracy across all models

✅ Complete System Included – Display enclosure, power supply, sensor, and standard cable

✅ Pool Turnover Rate Display – The first and only flow meter that displays current turnover rate

✅ Remote Digital Display – Mount in convenient, easy-to-view location

✅ Dual Display Format – Numeric value and bar-graph flow rate display

✅ Programmable Flow Rate Alarms – Set minimum and maximum flow rate alerts

✅ 4-20mA Output – Interface with Variable Frequency Drives for constant flow control

✅ Equipment Interface – Control heaters, chemical feeders, and UV units based on flow rate (requires optional Auxiliary Relay)

✅ Eliminates Parallax Error – Digital readout ensures consistent readings

✅ Multi-Unit Display – US GPM, Litres Per Minute (LPM), or m³/hour

✅ Retrofit Compatible – Install on existing FlowVis units (1.5″ to 8″)

✅ No Calibration Required – Factory calibrated, programmed with simple DIP switches

✅ Made in USA – Manufactured by H2flow Controls

✅ 3-Year Warranty – Comprehensive manufacturer coverage

🔧 Technical Specifications

Specification	Value
Model	FV-D (FlowVis Digital)
NSF 50 Certification	Level 1 (L1)
NIST Traceable Accuracy	0.02%
Display Type	LCD
Backlight Colours	Red, Green, White
Enclosure Material	ABS
Enclosure Rating	NEMA 4X / IP66
Enclosure Dimensions	152mm × 152mm × 90mm (H×W×D)
Mounting Brackets	Stainless Steel (4 included)
Power Supply Input	100-240VAC, 0.4A
Power Supply Output	12VDC, 1.0A
Low Voltage Cable Length	3M (10 feet)
Sensor Housing	Clear Polycarbonate
Sensor Cable Length	0.5M (20 inches)
Display Cable Length	3.5M (138 inches)
Extension Cable (Optional)	7.62M (25 feet)
4-20mA Output	Scaled 4mA = zero flow, 20mA = max flow
Maximum Load (4-20mA)	250 ohms
Auxiliary Relay (Optional)	DPDT dry contacts, 20A max
Working Pressure	50 psi
Operating Temperature	0°C to 50°C (32°F to 122°F)
Storage Temperature	-20°C to 60°C (-4°F to 140°F)
Compatible Pipe Sizes	1.5″ to 8″ (DN40 to DN200)
Calibration Required	No
Installation Rating	Indoor use only
Certifications	NSF 50, UL, cUL, CE
Warranty	3 Years
Country of Origin	USA 🇺🇸

📈 NSF 50 Accuracy Certification

FlowVis Digital accuracy has been independently certified by NSF to the NSF 50 Standard for Flow Meters. At the time of certification, FlowVis Digital is the only digital flow meter in the world certified to this rigorous standard.

FlowVis Model	Pipe Size	Flow Range (m³/h)	NSF 50 Level
DN40	1.5″	2–20	L1
DN50/65	2″–2.5″	2–25	L1
DN80	3″	16–55	L1
DN100	4″	28–102	L2
DN150	6″	68–227	L1
DN200	8″	113–410	L1

NSF 50 Level 1 Requirements:

• Average of absolute values of all single point deviations must be ≤2%
• Single point deviations shall not exceed ±4%

🎯 FlowVis Digital Allows You To

💧 Know the Turnover Rate

All but two US States have mandated turnover rate requirements for commercial pools and spas. FlowVis Digital is the first and only flow meter that displays the current turnover rate.

⚡ Interface with Other Equipment

FlowVis Digital can interface with heaters, chemical feeders, and UV units so they operate only above a user-defined flow rate.

🎚️ Set Flow Rate Alarms

Set minimum and maximum flow rate alarms to ensure your system operates as desired.

📍 Receive Remote Indication

Eliminates problems with gaining access to the flow reading, such as in tight spaces, or issues with parallax errors.

🔄 Retrofit to Existing FlowVis

Compatible with both new and existing FlowVis installations. Retrofit models 1.5″ to 8″ can be installed quickly and easily.

📊 Know the Precise Flow Rate

FlowVis Digital is factory calibrated to mirror a Mag flow meter with NIST traceable accuracy of 0.02%. Programmed with simple DIP switch selection.

🎯 Real World Applications

🏊‍♂️ Commercial Pools & Spas

Turnover rate display enables instant compliance verification without manual calculations.

🏨 Hotels & Leisure Centres

Remote display mounting allows monitoring from convenient locations rather than plant rooms.

🔧 Variable Speed Pump Systems

4-20mA output enables VFD interface for constant flow control.

🔥 Heater Protection

Auxiliary relay interface ensures heaters only operate above safe flow rates.

💊 Chemical Feed Systems

Interface capability allows chemical feeders to operate only when adequate flow is present.

🔆 UV Disinfection Systems

Ensures UV units operate within designed flow parameters for effective treatment.

🛠️ Optional Accessories

Item	Description
8M Extension Cable	Extends sensor-to-display cable length
Auxiliary Interface Unit	Relay kit for equipment control based on flow rate
Replacement Lid Assembly	Required for pre-October 2020 DN80/DN100 retrofits
FlowVis Flow Meter	Required base unit (sold separately)

⚠️ Important Installation Notes

• Indoor use only – NSF 50 certified for indoor installations
• Qualified electrician required – All electrical connections must be made by qualified personnel
• Windows PC required – Advanced setup features require Windows 7/8/10 PC with internet connection
• Do not cut sensor cables – Cutting or splicing sensor cables voids warranty
• Screw torque – Tighten to 25 in/lbs (2.8 Nm) using hand screwdriver only

📥 Downloads & Resources

📄 FlowVis Digital Installation Manual – Complete installation, wiring, programming, and troubleshooting guide (PDF)

📄 FlowVis & FlowVis Digital Product Brochure – Product overview and NSF 50 certification details (PDF)

🏆 Why Choose FlowVis Digital?

✅ Only NSF 50 Certified Digital Flow Meter – Independent third-party verification of accuracy

✅ Unique Turnover Rate Display – No other flow meter offers this essential compliance feature

✅ Complete System – All components included for installation

✅ Award-Winning Design – Pool & Spa News Top 50 Products (received this honour three times)

✅ Equipment Interface Capability – Protect heaters, control chemical feeders, manage UV systems

✅ VFD Integration – 4-20mA output for constant flow control

✅ Universal Compatibility – Works with all FlowVis models 1.5″ to 8″

✅ No Calibration Required – Factory calibrated to NIST traceable 0.02% accuracy

✅ American Manufacturing – Made in USA with 3-year warranty

🛒 Why Buy From Parts4Tubs?

✅ Authorised Distributor – Genuine products with full manufacturer warranty

✅ Technical Support – Assistance with model selection and installation queries

✅ Competitive UK Pricing – Trade pricing without account requirements

✅ Fast UK Delivery – In-stock items dispatched promptly

✅ Complete Accessory Range – Extension cables, relay kits, and FlowVis units available

✨ Summary

The FlowVis Digital Flow Meter System adds advanced digital functionality to the industry’s most accurate and trusted flow meter. NSF 50 Level 1 certified with NIST traceable 0.02% accuracy, it is the only digital flow meter in the world with this certification. The unique pool turnover rate display, programmable flow alarms, 4-20mA VFD output, and equipment interface capability deliver professional-grade flow monitoring for commercial and residential pools. Complete system includes NEMA 4X enclosure, sensor, power supply, and cables—ready for new installations or retrofit to existing FlowVis units from 1.5″ to 8″. Made in USA with 3-year warranty.