Centri Tank Monitor

In this guide: Everything you need to know about Centri Tank Monitor systems - covering what they are, how Centri technology works, key features and specifications, how they compare to other tank monitoring solutions, common applications, installation and setup, and the complete buying guide for 2026.

Centri Tank Monitor: Quick Answer

Centri Tank Monitor refers to a category of industrial and commercial tank level monitoring systems produced by Centri - a company specializing in high-accuracy level measurement technology for compressed gas, cryogenic liquid, and industrial fluid storage tanks. Centri's monitoring systems are designed for commercial, industrial, and agricultural applications where precision level measurement, real-time data access, and reliability under demanding operating conditions are non-negotiable requirements. Unlike consumer-grade propane tank monitors that focus on simplicity and cost-effectiveness, Centri Tank Monitor products are built for professional operators managing bulk gas storage, industrial gas distribution, medical gas supply, and cryogenic liquid systems. The Centri approach combines capacitive level sensing technology with robust industrial enclosures, wired and wireless connectivity options, and cloud-based monitoring platforms that support multi-site fleet management. Key features include ±1–2% full-scale accuracy, compatibility with LPG, LNG, argon, nitrogen, oxygen, and other industrial gases and cryogenic liquids, ATEX and CSA certifications for hazardous-area use, and integration with SCADA, PLC, and cloud IoT platforms.

What Is Centri Tank Monitor Technology?

The Centri Approach to Tank Level Monitoring

Centri systems represent the professional-grade tier of tank level monitoring technology - a significant step above consumer and prosumer solutions in terms of measurement precision, build quality, and operational durability. Understanding what differentiates Centri-class systems from consumer monitors helps clarify when a professional-grade solution is warranted.

The measurement technology gap: Consumer tank monitors - including popular WiFi and Bluetooth propane monitors - use ultrasonic sonar to estimate the liquid-gas interface position inside a tank. This technology is accurate to approximately ±3–5% of full scale, which is sufficient for most residential and small commercial propane applications where knowing when to schedule a refill is the primary goal. Centri Tank Monitor systems use capacitive level sensing technology, which directly measures the fill level by detecting the electrical capacitance difference between the liquid phase and the vapor phase in the tank. Capacitive sensing delivers ±1–2% full-scale accuracy - 2–3 times more precise than ultrasonic - making it suitable for applications where fill volume accuracy directly affects inventory management, custody transfer, or process control.

The build quality gap: Consumer tank monitors are housed in weatherproof but relatively lightweight plastic enclosures designed for ambient outdoor use in temperate climates. Centri Tank Monitor products use industrial-grade stainless steel or aluminum enclosures with ATEX (Explosive Atmospheres) and CSA certifications that permit use in hazardous locations where flammable gases or vapors may be present - a regulatory requirement for many industrial and commercial gas storage installations. The electronics inside are rated for extended temperature ranges, high vibration environments, and the demanding conditions of industrial facilities, outdoor bulk storage sites, and marine applications.

The connectivity gap: Consumer propane monitors are designed for a single tank, a single user account, and a smartphone app. Centri Tank Monitor systems support multi-tank, multi-site fleet monitoring through wired industrial bus connections (Modbus RTU, Modbus TCP/IP) and wireless industrial IoT protocols (LoRaWAN, Sigfox, NB-IoT). A single Centri monitoring platform can manage dozens or hundreds of tanks across multiple facilities, making it suitable for propane distributors, industrial gas suppliers, and agricultural cooperatives managing large tank fleets.

How Centri Tank Monitor Technology Works

Capacitive Level Sensing and Industrial Data Architecture

Centri Tank Monitor systems use capacitive level sensing as their core measurement technology. This approach is fundamentally different from the ultrasonic sonar used in consumer propane monitors, and understanding it explains why Centri systems achieve higher accuracy and broader compatibility with industrial gas and cryogenic liquid storage tanks.

Capacitive level sensing - the principle: A capacitive level sensor consists of two conductive electrodes - typically two parallel metal rods or plates - separated by an insulating gap. The space between the electrodes is filled with whatever medium is present inside the tank: LPG vapor (when the tank is empty at the sensor height) or liquid LPG (when the tank is full at the sensor height). The dielectric constant of LPG vapor is approximately 1.0 (close to that of a vacuum), while the dielectric constant of liquid propane is approximately 1.6–1.8. Because liquid and vapor have different dielectric constants, the electrical capacitance between the two electrodes changes sharply at the liquid-vapor interface. The sensor detects this capacitance change and uses it to determine the precise liquid level with ±1–2% full-scale accuracy.

Why capacitive sensing outperforms ultrasonic for industrial applications:

Better accuracy: ±1–2% full scale vs ±3–5% for ultrasonic

Works through foam and turbulence: Ultrasonic signals scatter off foam and surface agitation; capacitive sensing is unaffected

Works at extreme temperatures: Capacitive sensors operate reliably at cryogenic temperatures (-196°C for liquid nitrogen, -183°C for liquid oxygen) and high-temperature industrial environments where ultrasonic transducers degrade

No temperature compensation errors: Ultrasonic speed-of-sound calculations require temperature compensation; capacitive sensing is inherently temperature-stable

Compatible with small tanks: Capacitive sensors work accurately in tanks as small as a few liters, where ultrasonic signals may not have sufficient path length

No moving parts: The capacitive sensor has no mechanical components to wear or fail

Industrial data architecture: Centri Tank Monitor systems integrate with industrial control infrastructure through multiple connectivity pathways. Wired connections (Modbus RTU over RS-485, Modbus TCP/IP over Ethernet) allow direct integration with PLCs (Programmable Logic Controllers) and SCADA (Supervisory Control and Data Acquisition) systems used in industrial facilities. Wireless connections (LoRaWAN, NB-IoT, Sigfox) enable remote tank monitoring at sites where wired infrastructure is impractical - remote bulk storage locations, agricultural facilities, or distributed tank fleets. All data flows to a cloud-based monitoring platform that provides dashboards, fill history, consumption analytics, low-level alerts, and automated refill ordering triggers.

Key Features of Centri Tank Monitor Systems

What Sets Professional-Grade Tank Monitors Apart

Applications for Centri Tank Monitor Systems

Where Professional-Grade Tank Monitoring Is Required

Industrial and commercial LPG distribution: Propane and butane distributors managing bulk LPG storage (10,000–50,000 gallon stationary tanks) and cylinder filling operations use Centri-class tank monitoring systems to track inventory levels across multiple storage tanks and customer sites. Accurate level data prevents overfilling (a safety hazard), underfilling (a customer service failure), and run-outs (an operational emergency). Multi-site fleet management platforms allow a single operations manager to monitor an entire distribution network from a desktop dashboard.

Industrial gas supply (argon, nitrogen, CO₂): Welding operations, food processing facilities, pharmaceutical manufacturers, and electronics fabricators use industrial gases stored in high-pressure cylinders and bulk cryogenic tanks. Centri Tank Monitor systems track levels in these specialized containers, where measurement accuracy directly affects inventory ordering and process reliability. Capacitive sensing works accurately on cryogenic liquids (liquid nitrogen at -196°C, liquid argon at -186°C) where ultrasonic sensors fail.

Medical gas supply (oxygen, nitrous oxide): Hospitals, medical centers, and home healthcare providers rely on medical-grade gas supplies stored in bulk cryogenic tanks. Level monitoring ensures continuous supply - running out of medical oxygen is a patient safety critical event. Centri-class systems used in medical gas applications are typically FDA-registered and comply with NFPA 99 and relevant medical device standards.

Agricultural and farm operations: Farms and agricultural cooperatives that use bulk propane for grain drying, livestock heating, irrigation pump engines, and farm equipment need reliable tank level monitoring across multiple tanks and multiple farm properties. Centri-class systems with LoRaWAN wireless connectivity are well-suited to rural agricultural environments where wired infrastructure is impractical.

Marine and offshore applications: Marine vessels, offshore platforms, and port facilities that store LPG, LNG, or other compressed gases need tank level monitoring systems rated for marine environments - salt spray, vibration, motion, and limited power availability. Centri systems with stainless steel enclosures, solar power options, and satellite connectivity are designed for these demanding applications.

Compressed air and pneumatic systems: While not a gas fuel application, Centri Tank Monitor technology is also used to monitor compressed air receiver tanks and pneumatic fluid reservoirs in industrial facilities, where level and pressure monitoring support predictive maintenance and operational efficiency programs.

Centri Tank Monitor vs. Other Professional Tank Monitoring Solutions

How Centri Compares to Competitors

| Factor | Centri Tank Monitor | Mascoat Industrial | Binmaster (Level Indicators) | OTT HydroMet | Sensotone / Lakeview | |:-------||:-----------------:|:--------------------------:|:-----------:|:------------------:| | Measurement technology | Capacitive | Ultrasonic | Capacitive / rod | Ultrasonic / radar | Capacitive | | Accuracy | ±1–2% | ±3–5% | ±1–3% | ±2–5% | ±1–2% | | Hazardous area certified | ✅ ATEX, CSA | ⚠️ Some models | ✅ ATEX, CSA | ⚠️ Some models | ✅ CSA | | Industrial protocols | Modbus, LoRa, NB-IoT | Modbus, 4-20mA | Modbus, 4-20mA | Modbus, SDI-12 | Modbus | | Cryogenic liquid support | ✅ Yes | ⚠️ Limited | ✅ Yes | ⚠️ Limited | ✅ Yes | | Multi-site fleet management | ✅ Cloud platform | ✅ Cloud platform | ⚠️ Basic | ✅ Cloud platform | ⚠️ Basic | | SCADA integration | ✅ Native | ✅ Native | ✅ Native | ✅ Native | ✅ Native | | Price range | $300–$2,500 | $200–$1,500 | $150–$2,000 | $500–$3,000 | $200–$1,200 | | Best for | Industrial gas; cryogenic | Industrial; acoustic insulation | Bulk solids; level switches | Environmental monitoring | Industrial gas; high accuracy |

Installing a Centri Tank Monitor System

Professional Installation Requirements

Important note: Centri Tank Monitor systems are professional-grade instruments that require qualified installation. Unlike consumer propane monitors (which most users install themselves), Centri systems should be installed by a certified industrial instrumentation technician or an authorized Centri distributor to ensure correct sensor calibration, proper hazardous-area certification compliance, and correct integration with SCADA or cloud platforms.

Pre-installation site assessment: Before installation, a qualified technician assesses the tank installation for:

Tank type, size, material, and pressure rating

Existing instrumentation (pressure gauges, relief valves, fill couplings)

Hazardous-area classification of the installation location

Available power supply (AC mains, solar, loop-powered, battery)

Connectivity infrastructure (wired Ethernet, WiFi, cellular, LoRaWAN gateway)

Integration requirements (SCADA, PLC, cloud platform)

Sensor installation: The capacitive level sensor is installed through a standard tank opening - typically a 1-inch or 2-inch NPT (National Pipe Thread) threaded port. For hazardous-area installations, the sensor installation must comply with ATEX or CSA hazardous-area wiring standards, including proper grounding, intrinsic safety barriers, and explosion-proof enclosure requirements. The sensor probe extends into the tank to the desired measurement point - typically near the tank bottom for total level measurement, or at a specific height for high-level or low-level alarm applications.

Wiring and connectivity: For wired installations (Modbus RTU/TCP), a shielded industrial cable connects the sensor to the facility's control system or data logger. For wireless installations, the sensor transmits data to a nearby LoRaWAN gateway or NB-IoT base station, which forwards data to the cloud monitoring platform.

Calibration and commissioning: After installation, the system is calibrated against known fill levels - typically by comparing the sensor reading against the tank's volumetric measurement during a controlled fill or drain cycle. Factory calibration traceability to NIST (National Institute of Standards and Technology) standards ensures measurement accuracy is documented and verifiable. The monitoring platform is configured with tank parameters, alert thresholds, and user accounts.

Frequently Asked Questions

Q1: What is the accuracy of a Centri Tank Monitor system?

Centri Tank Monitor systems using capacitive level sensing technology achieve ±1–2% full-scale accuracy - approximately 2–3 times more precise than consumer ultrasonic tank monitors (±3–5%). This level of accuracy is important for commercial applications where measurement error directly affects inventory management, custody transfer documentation, or process control. For example, a 30,000-gallon bulk LPG storage tank measured with ±1% accuracy has an error of approximately 300 gallons maximum - compared to ±1,500 gallons for a consumer ultrasonic monitor.

Q2: Can Centri Tank Monitor systems be used on fiberglass or composite tanks?

Yes - capacitive level sensors work on all tank materials, including steel, stainless steel, aluminum, fiberglass, and composite materials. This is a key advantage over magnetic float gauges, which require ferromagnetic steel. For fiberglass and composite LPG tanks, which are increasingly common in consumer exchange programs and some commercial applications, capacitive sensing provides the most reliable and accurate level measurement available. Always verify compatibility with the specific Centri sensor model and your tank's material and pressure rating before installation.

Q3: Do Centri Tank Monitor systems require a monthly subscription?

Centri Tank Monitor hardware is sold as a standalone product. The monitoring platform (cloud software, dashboards, alerts) may be included at no additional cost or available as an optional subscription, depending on the specific product line and the distributor. Commercial and enterprise users typically pay for a platform subscription that includes multi-site fleet management, advanced analytics, SCADA integration, and dedicated support. The subscription model varies by product line and application - consult an authorized Centri distributor for specific pricing and platform terms.

Q4: How do Centri Tank Monitor systems integrate with SCADA and PLC systems?

Centri Tank Monitor systems support industry-standard industrial communication protocols, primarily Modbus RTU (RS-485 serial) and Modbus TCP/IP (Ethernet). Integration with a SCADA or PLC system is typically accomplished by configuring the SCADA/PLC to poll the Centri sensor's Modbus registers for level data, status flags, and alarm states. The Centri sensor acts as a Modbus slave device, and the SCADA/PLC acts as the Modbus master. For facilities using other industrial protocols (HART, Foundation Fieldbus, PROFINET), protocol conversion gateways can bridge between the sensor and the control system.

Q5: What certifications do Centri Tank Monitor systems carry?

Centri Tank Monitor products used in hazardous-area applications typically carry ATEX certification (for use in European Union explosive atmospheres) and/or CSA certification (for use in North American hazardous locations). The specific certification level depends on the sensor model and the hazardous-area classification of the installation site (e.g., Class I Division 1 or Zone 0/1/2 for flammable gas environments). Additional certifications may include IECEx (international explosive atmospheres), UL listing for safety, and for medical gas applications, relevant FDA or NFPA 99 compliance documentation. Always specify the required certifications for your installation site before purchasing.

The Bottom Line

Centri Tank Monitor systems represent the professional tier of tank level monitoring technology - built for commercial, industrial, and agricultural operators who need measurement accuracy, build quality, and operational durability that consumer-grade propane monitors cannot provide. With capacitive level sensing delivering ±1–2% full-scale accuracy, ATEX and CSA certifications for hazardous-area use, industrial communication protocols (Modbus, LoRaWAN, NB-IoT) for SCADA and fleet management integration, and enclosures rated for extreme temperatures and demanding environments, Centri-class systems are the right choice for bulk LPG distribution, industrial gas supply, medical gas management, agricultural cooperatives, and marine applications. The trade-off is cost: $300–$2,500 per sensor vs. $40–$300 for consumer alternatives - but for operators managing inventory across multiple tanks and facilities, the accuracy, reliability, and integration capabilities of a Centri-class system deliver measurable ROI through reduced overfill incidents, fewer emergency deliveries, better inventory planning, and compliance with hazardous-area safety regulations. For residential propane users or small commercial operators with a single tank and simple monitoring needs, a consumer-grade WiFi or Bluetooth propane monitor remains the practical choice. For everyone else - professional operators who depend on accurate, reliable tank data as part of their core operations - Centri Tank Monitor systems are purpose-built for the job.

Last updated: July 2026

Disclaimer: This guide provides general information about Centri Tank Monitor systems and professional-grade tank level monitoring technology for educational and purchasing guidance purposes. Specific product specifications, accuracy ratings, certifications, pricing, and availability vary by product model, application, and authorized distributor. Always verify compatibility with your specific tank type, operating conditions, hazardous-area classification requirements, and regulatory obligations before purchasing or installing any professional-grade tank monitoring system. Professional-grade tank monitoring equipment should be installed by qualified industrial instrumentation technicians in compliance with all applicable local, national, and international safety standards and regulations governing hazardous-area instrumentation. This guide is not affiliated with, endorsed by, or sponsored by Centri, Mascoat, Binmaster, OTT HydroMet, Sensotone, or any other tank monitoring equipment manufacturer.