Ultrasonic Level Meter LR725L Series

Features

• Automatic Echo Menu: Enables convenient querying of on-site failure causes.
• Wide Measuring Range: Capable of measuring distances from 1 meter to 50 meters.
• Separated Type with Wide Voltage Power Supply: Operates on a voltage range of 90V to 250V AC.
• Anti-interference Performance: Good resistance to interference, suitable for strong steam environments.
• Probe Protection Level: IP68 protection for the probe.

Introduction

The LR725L Ultrasonic Level Meter is designed for measuring both material and liquid levels. It is a non-contact, highly reliable, cost-effective instrument that is easy to install and maintain. This level meter is suitable for industrial applications including water treatment, municipal administration, chemical industry, metallurgy, and machinery manufacturing.

Measuring Principle

The LR725L operates by measuring the spatial distance DDD of the medium surface, which is proportional to the travel time TTT of the sound wave, using the formula: D=V×T2D = \frac{V \times T}{2}D=2V×T​ where VVV is the speed of sound. The level LLL is determined by: L=H−DL = H - DL=H−D After setting the parameters for an empty and full tank, the electronic unit converts the pulse travel time into the corresponding level value LLL and outputs a 4mA to 20mA DC signal.

Order Guide

Type

• W: Integrated
• F: Separated

Meter Type

• YW: Ultrasonic liquid level meter
• WW: Ultrasonic material level meter
• CJ: Ultrasonic differential level meter

Level Range: Indicated by two numbers, e.g., 05 for 5m, 30 for 30m.

Probe Material

• A: ABS
• F: PTFE
• T: Others

Probe Mounting Dimension

• F: G1-1/2, major diameter: Φ47.8mm
• G: G2A, major diameter: Φ59.6mm
• T: Others

Mounting Methods

• N: Non-flange mounting type
• C: DN50 flange
• E: DN80 flange
• F: DN100 flange

Extended Probe Thread Length: Standard or specified length (e.g., 100mm).

Power Supply

• DCSP: 12V DC, 9V DC, battery supply
• DC: 24V DC (4-wire)
• AC: 220V AC (4-wire)
• TC: 24V DC (2-wire)

Relay Quantity

• R0: No relay
• R2: 2 relays
• R4: 4 relays

Output Signal

• MA: 4mA to 20mA DC
• C2: RS232
• C4: RS485
• C2MA: 4mA to 20mA DC + RS232
• C4MA: 4mA to 20mA DC + RS485
• HTMA: 4mA to 20mA DC + HART
• TS: Others

Probe Quantity

• S1: Single probe
• S2: Dual probes

Electronic Housing Material

• PL: ABS
• AI: Aluminum casting

Probe Cable Length

• 00: No cables (generally for integrated type)
• Specified length (e.g., 010 for 10m cables, up to 200m)

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