Liquid level measurement is a routine task within explosive gas atmospheres such as petroleum, chemical, oil and gas storage & transportation industries, where safety and accuracy are critical. Zheda Jingyi YB series magnetostrictive liquid level gauges support two explosion-proof standards: intrinsically safe type and flameproof type. Equipped with core advantages including long measuring range, high precision and multiple interfaces, they deliver integrated solutions covering safety protection and accurate measurement for flammable and explosive applications, consolidating the safety barrier for industrial operations.

I. Dual Explosion-proof Options for Different Hazardous Zones

The YBGB series offers two explosion-proof configurations: intrinsically safe type (Ex ia IIC T4 Ga) and flameproof type (Exd IIB T5 Gb), which precisely meet requirements of different hazard levels from working principle to practical application scenarios.

1. Intrinsically Safe Explosion Protection: Inherent Safety, Risk Control at the Source

Core principle: The core concept of intrinsically safe protection lies in energy limitation. Instead of relying on robust housing, it utilizes associated equipment such as safety barriers to restrict the electrical energy entering hazardous areas to a level insufficient to ignite explosive gas. Even if short circuits or open circuits occur on cables, the spark energy generated remains extremely low and cannot act as an ignition source, eliminating ignition risks fundamentally.

Explosion-proof marking: Ex ia IIC T4 Ga

Applicable scenarios: Suitable for hazardous areas with explosive gases (especially Group IIC gases including hydrogen and acetylene), particularly Zone 0 and Zone 1 locations with stringent safety requirements.

Core advantages: Compact size and low power consumption, making it the preferred choice for continuous high-risk hazardous environments.

TEC-Y Series Intrinsically Safe Liquid Level Gauge

2. Flameproof Explosion Protection: Robust Housing for Explosion Containment

Core principle: The design philosophy of flameproof protection relies on containment. High-strength specialized housing fully encloses electronic circuits that may generate sparks or electric arcs. Should an internal explosion occur, the housing can withstand explosion pressure without rupture. Meanwhile, precisely machined flameproof joint gaps cool and block explosive flames and high-temperature gas, preventing ignition of external hazardous atmosphere.

Explosion-proof marking: Exd IIB T5 Gb

Applicable scenarios: General hazardous locations of Zone 1 and Zone 2, such as storage tanks for gasoline, diesel and chemical solvents, oil & gas processing areas and tank farm monitoring stations.

Core advantages: Robust construction, excellent resistance to harsh operating conditions, and no requirement for complicated associated equipment. Well suited for outdoor and complex industrial sites.

Figure 3: TEC-Y Series Flameproof Liquid Level Gauge

Friendly Reminder: Hazardous Area Classification Hazardous areas are classified into Zone 0, Zone 1 and Zone 2 according to the frequency and duration of explosive mixture presence.

• Zone 0: Areas where explosive gas mixtures exist continuously or for long periods, representing the highest hazard level.

• Zone 1: Areas where explosive gas mixtures may occur occasionally during normal operation.

• Zone 2: Areas where explosive gas mixtures are unlikely to appear under normal operation; if they occur, they only persist for a short time.

II. Product Advantages: Superior Performance Built on Safety

1. Ultra-long Measuring Range & High Precision

The standard effective stroke covers 25 mm ~ 5500 mm, and the maximum range can be extended to 23000 mm, satisfying liquid level measurement for scenarios ranging from small vessels to large storage tanks. It delivers a resolution up to 0.1 mm, meeting strict requirements for high-precision metering and process control.

2. Flexible Rod / Rigid Rod Optional for Greater Installation Flexibility

The YB series liquid level gauge supports two configurations: flexible rod and rigid rod, adapting to installation spaces with different constraints.

3. Multi-function Integration, One Instrument for Multiple Purposes

A single unit can simultaneously measure liquid level, liquid-liquid interface and triple interfaces (via RS485). It supports 5-point temperature measurement to realize synchronous monitoring of liquid level and temperature, satisfying measurement demands for complex media.

4. Multiple Interfaces Compatible with All Types of Control Systems

Standard interfaces include analog output (HART protocol) and RS485, enabling seamless connection with existing industrial control systems, featuring stable data transmission and strong anti-interference capability.

5. Low Power Consumption & High Ingress Protection for Long-term Stability

The operating current is below 70 mA. Low-power design effectively reduces internal heat generation and mitigates potential safety risks under high temperatures. With IP67 ingress protection, the sensor resists dust, water and corrosion for stable operation in harsh industrial environments.

6. Intelligent Electronic Display Head for Convenient On-site Reading

Equipped with an intuitive electronic display head for real-time local data display, facilitating routine commissioning, inspection and maintenance.

III. Typical Application Scenarios

Suitable for explosive gas environments including petroleum exploitation, oil refining & chemical industry, oil & gas storage and transportation, gas stations, pharmaceutical production, food fermentation, etc. It enables continuous monitoring of liquid level, interface and temperature for various flammable and combustible liquids.

Measurements deployed in hazardous environments demand field-proven reliability. Featuring intrinsically safe and flameproof dual explosion-proof technologies, Zheda Jingyi YB series liquid level gauges accurately match various applications from Zone 0 to Zone 2. With all-round strengths including ultra-long range, high precision and multi-parameter measurement, they safeguard the safety and accuracy of liquid level monitoring under harsh hazardous working conditions.