PT686L SERIES

PT686L Level Transmitter

PT686L Industrial Level Transmitter provides precise hydrostatic liquid level measurement for tanks, vessels and industrial process systems. Featuring monocrystalline silicon sensor technology, optional HART communication and rugged IP67 protection, it ensures reliable long-term performance in demanding environments.

Level Range 1 mH₂O ~ 200 mH₂O

Output 1–5 V / 4–20 mA

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Technical Specifications

LEVEL PERFORMANCE

Level Range

1 mH₂O ~ 200 mH₂O

Accuracy

0.05% FS / 0.1% FS / 0.2% FS / 0.075%F.S

ELECTRICAL & COMMUNICATION

Output

4–20 mA / 1–5 V

Power Supply

12~45 VDC

MECHANICAL

Weight

0.5–1 kg

ENVIRONMENTAL

Operating Temperature

-40~85°C

Protection

IP68

Product Overview

PT686L Level Transmitter is engineered for accurate and reliable liquid level measurement in industrial tanks, vessels and storage systems. Utilizing advanced monocrystalline silicon pressure sensing technology with intelligent signal conditioning electronics, it provides long-term stability and high measurement accuracy in demanding industrial environments.

Supporting multiple output signals, wide measuring ranges and flexible process connections, the PT686L is widely used in petroleum, chemical processing, power generation, metallurgy, pharmaceutical manufacturing, food processing and water treatment applications.

Key Features

High-Stability Monocrystalline Silicon Sensor
Continuous Hydrostatic Level Measurement
Measuring Range up to 200 mH₂O
Accuracy up to ±0.05% URL
4–20 mA & HART Output
Wide Turndown Ratio (20:1)
355° Rotatable Display
Three-Key Magnetic Configuration
IP67 Industrial Protection
Long-Term Stable Performance

Applications

Industry	Typical Applications
Oil & Gas	Storage Tanks & Process Vessels
Chemical Processing	Chemical Storage Systems
Water Treatment	Reservoirs & Water Towers
Power Generation	Cooling Water Systems
Food & Beverage	Liquid Storage Tanks
Industrial Automation	Continuous Level Monitoring

Technical Highlights

Level Measurement Performance

Parameter	Specification
Measurement Principle	Hydrostatic Pressure
Measuring Medium	Liquid
Measuring Range	0–1 mH₂O to 0–200 mH₂O
Accuracy	±0.05%, ±0.075%, ±0.1% URL
Turndown Ratio	Up to 20:1
Sensor Technology	Monocrystalline Silicon
Display	355° Rotatable LCD
Long-Term Stability	Excellent

Electrical Specifications

Parameter	Specification
Power Supply	12–36 VDC
Output Signal	4–20 mA
Communication	HART (Optional)
Signal Conditioning	Integrated Electronics
Parameter Setting	Three-Key Magnetic Configuration
Surge Protection	Built-in Protection Circuit

Mechanical Specifications

Parameter	Specification
Housing Material	Aluminum Alloy
Wetted Parts	Stainless Steel
Process Connection	Multiple Thread & Flange Options
Protection Class	IP67
Display	355° Rotatable LCD
Installation	Tank / Vessel / Pipeline