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QDY70A Magnetic Level Gauge for Industrial Tanks

A power-free magnetic level gauge with clear bi-color local indication and optional 4–20mA/alarm outputs for versatile industrial tank monitoring.
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QDY70A Magnetic Level Gauge

QDY70A magnetic level gauge with clear on-site visual level display

Clear On-site Display for Faster Inspection

QDY70A is a magnetic level gauge designed around “Clear On-site Display for Faster Inspection.” Displays the measured value directly at the process point for easier inspection and commissioning. The local display makes the live value and operating state easier to verify during commissioning, inspection and routine maintenance. The feature is directly relevant to chemical process, level monitoring and storage tank projects. Check operating status directly without opening the control system, helping engineers keep the installation, inspection and signal path easier to manage during long-term operation.

QDY70A high temperature magnetic level gauge for industrial process tanks

High-temperature Structure for Hot Process Media

QDY70A is a magnetic level gauge designed around “High-temperature Structure for Hot Process Media.” Uses corrosion-resistant wetted materials for chemical liquids and aggressive process media. The wetted structure is selected for aggressive media so the measuring point is less exposed to corrosion, residue and premature material damage. The feature is directly relevant to chemical process, level monitoring and storage tank projects. Maintain reliable measurement in chemical process and corrosive media, helping engineers keep the installation, inspection and signal path easier to manage during long-term operation.

QDY70A magnetic level gauge with optional remote output alarm and monitoring

Optional Remote Output, Alarm & Monitoring Functions

QDY70A is a magnetic level gauge designed around “Optional Remote Output, Alarm & Monitoring Functions.” Provides clear switching, alarm or relay functions for equipment control and interlocking. The alarm, relay, switching or control function turns the measured condition into a clear action for pumps, valves, warning devices or equipment interlocks. The feature is directly relevant to chemical process, level monitoring and storage tank projects. Respond faster to abnormal conditions and equipment control demands, helping engineers keep the installation, inspection and signal path easier to manage during long-term operation.

Working Principle Diagram

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Technical Specifications

Operating Principle:Magnetic buoyancy coupling, non-contact drive


Visual Display:High-contrast bi-color flaps (red = liquid phase, white/green = gas phase); sharp level boundary with zero parallax error


Maximum Viewing Distance:≥10m clear reading under normal indoor lighting; visible from 15m+ in direct daylight


Float Response Speed:≤0.5s step response; no lag under normal level fluctuation


Flip Action Reliability:100% positive flip; no missed action, no jamming, no reverse display under rated vibration conditions


Upper / Lower Dead Band:Standard upper blind zone ≤30mm, lower blind zone ≤50mm; no effective measurement loss within rated range


Indication Repeatability:≤±2mm over full measuring range


Long-term Magnetic Stability:Flap magnetic retention ≥10 years; no demagnetization or color fading under normal operation


Anti-surge Damping:Built-in float damping structure; suppresses false flap oscillation from liquid turbulence and inlet surge


Remote Output Linearity (transmitter version):≤±0.5% F.S. for 4-20mA analog output, full temperature compensated


Remote Temperature Drift (transmitter version):≤±0.05% F.S./℃ within full operating temperature range

Dimension Chart

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Wiring Diagram

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Phone: +86-19715617532
Add: Building 14, University Science and Technology Park, Fenghuangshan Economic Development Zone, Xiangshan District, Huaibei City, Anhui Province

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