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Carlo Gavazzi VNY 4 NS/NT Level Sensor (Item No. 481046)
Core Summary: The VNY 4 NS/NT is a 4‑electrode insertion level sensor designed by Carlo Gavazzi specifically for conductive liquids, Item No. 481046.
It is used for high/low level control in tanks and vessels, suitable for industrial automation and process control applications.
- Model and Item Number Explanation
| Item | Description |
| Full Model | VNY 4 NS/NT |
| Item No. / Order Code | 481046 |
| Brand | Carlo Gavazzi |
| Product Type | Conductive Level Sensor |
| Number of Electrodes | 4 Electrodes |
| Mounting Connection | 1½” ISO 228/1 pipe thread (G1½”) |
| Electrode Material | Stainless Steel (SS) |
| Housing Material | Nylon 6 |
| Standard Electrode Length | 1 m (can be cut to length) |
- Core Technical Specifications
| Item | Specification | Notes |
| Sensing Principle | Conductive (activated by liquid conductivity) | For conductive liquids only; non‑conductive liquids require ultrasonic/radar sensors |
| Supply Voltage | Requires an amplifier relay | No built‑in electronics; must be driven by an external control unit |
| Rated Pressure | Max. 10 bar | Suitable for medium‑high pressure vessels/tanks |
| Operating Temperature | -25°C ~ +80°C | Covers most industrial process applications |
| Protection Rating | IP65 | Dust‑tight and protected against water jets; suitable for wet/corrosive environments |
| Electrode Details | Ø4 mm stainless steel, standard length 1 m | Can be cut on‑site to match level height |
| Mounting Thread | 1½” ISO 228/1 (G1½”) | Standard industrial pipe thread, compatible with most tank connections |
| Wiring | Screw terminals / PG13 cable gland | Easy installation, reliable connection |
| Certification | CE | Complies with European electrical safety standards |
- Product Features and Advantages
- High Compatibility
Designed specifically for conductive liquids (water, acids, alkalis, beverages, etc.) for level high/low control and alarm
4‑electrode design improves detection reliability and prevents false triggering
Electrodes can be cut on‑site for flexible adaptation to various level heights
- Robust and Durable
Stainless steel electrodes are corrosion and wear‑resistant, suitable for harsh environments such as chemical, food and pharmaceutical industries
Nylon 6 housing with high mechanical strength and impact resistance; IP65 for outdoor and wet environments
10 bar rated pressure for medium‑high pressure tanks and pressure vessels
- Flexible Expansion
Must be used with Carlo Gavazzi amplifier relays (e.g., RN series) for switching output and logic control
Supports integration with PLC and DCS systems to build automated level monitoring networks
- Typical Applications
Chemical storage tanks: level monitoring and high/low alarm for conductive liquids such as acids, alkalis and solvents
Food and beverage: level control for water tanks, fermentation tanks and dosing tanks
Water treatment: level monitoring of raw water, clean water and sewage tanks
Pharmaceutical industry: level and safety interlock for reactors and storage tanks
Industrial circulating water: automatic water supply/drainage for cooling towers and reservoirs
- Accessories and Replacement Options
- Required Accessory (Amplifier Relay)
The sensor has no built‑in electronics and must be used with a Carlo Gavazzi amplifier relay. Recommended models:
RN series: RN1A4024, RN2A4024, etc., with 24VDC/230VAC output for different control circuits
- Same‑Brand Replacements
| Original Model | Replacement | Key Difference | Application |
| VNY 4 NS/NT (481046) | VNYI4 | Upgraded electrode insulation (PE insulation), stronger anti‑interference | High‑purity / corrosive liquid applications |
| VNY 4 NS/NT | VNY2 NS/NT | 2‑electrode configuration, lower cost | Simple level control with low accuracy requirements |
| VNY 4 NS/NT | VNY4‑PU | Push‑In terminals, wiring efficiency increased by 60% | Mass installation and fast wiring |
- Cross‑Brand Equivalent Replacements
| Brand | Equivalent Model | Key Matching Specifications |
| Weidmuller | IPL VNY 4 | 4 electrodes, 1½” thread, 10 bar pressure |
| Phoenix Contact | SENTRON VNY 4 | Conductive level detection, compatible with 1 m electrodes |
| CHINT | CZY 401 | Domestic alternative, 4 electrodes, stainless steel, G1陆” thread |
- Selection and Usage Guidelines
- Liquid Compatibility
Only for conductive liquids (conductivity ≥ 10 µS/cm); non‑conductive liquids (e.g., oils) require ultrasonic or radar level sensors
- Installation Specifications
Mounting thread: 1½” ISO 228/1 (G1½”); confirm tank connection size before installation
Electrode insertion depth depends on control range; standard 1 m electrodes can be cut on‑site
- Wiring Requirements
The sensor is only an electrode probe and must be used in series with an amplifier relay for power and switching output
Observe electrode polarity during wiring to avoid short circuits and ensure good contact
- Maintenance Tips
Clean electrode surfaces regularly to prevent fouling that affects accuracy
Inspect terminal tightness and insulation every 6–12 months to avoid poor connections
> Note: The VNY 4 NS/NT (Item No. 481046) is a standard industrial level sensor from Carlo Gavazzi, widely used in process automation systems. It is fully compatible with the brand’s ComPacT series relays and PLC controllers, and can be directly used for system upgrades and new projects.
