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JJY YLD158DP EN.jpg 1
JJY YLD158DP 1 1

Remote Level Indicator for Level Gauge

Model JJY-YLD158DP
Sensor signal input radar level transmitter RS-485
Signal output 4-20mA 3-wire System/RS485
Operating voltage AC 220V
Sampling Frequency 500ms/Configurable
Measurement Accuracy ±2mm
Control interlock Contact rating: 250 VAC / 4 A or 30 VDC / 4 A (2 channels)
Housing Material Aluminum Alloy
Operating Temperature –40 °C to +75 °C
Packaging Dims. & Wt.
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  • Introduce
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The JJY-YLD158DP is a remote level indicator for radar level gauges. It connects straight to your radar level transmitter, shows the live level on a backlit LCD, and adds two switch outputs plus RS-485 and 4–20 mA so you can drive a pump, feed a PLC or push data to a SCADA/HMI — all from one wall-mounted unit.

Backlit LCD + SET / ▲ / ▼ / OK keypad2× switch output (pump control)RS-485 + 4–20 mA output✓ Direct radar connectionAC 220 V / DC 9–24 V

Key Features

Direct radar connection — live level on the display

Plug the unit straight into the JJY radar level transmitter and the live level shows on the backlit LCD. No separate converter, gateway or controller is needed — pair the sensor, set the range from the keypad, and the reading is there.

Two switch outputs — automate your pump

Two independent switch (relay) outputs let you trigger a pump or valve on high and low level. Wire them to your motor starter and the indicator becomes the level controller — alarm and automation in one box.

RS-485 and 4–20 mA signal output

Standard RS-485 (Modbus) connects to your SCADA, HMI or BMS, while a calibrated 4–20 mA current loop feeds a PLC or analog recorder. Integrate the level into any existing system without custom hardware.

Dimensions, Wiring & Installation

JJY-YLD158DP remote level indicator display unit with backlit LCD and keypad
Indicator unit — backlit LCD with menu keypad. Enlarge
JJY-YLD158DP main board: 12-24V power, K2 relay switch output, RS-485 and 4-20mA
Main board — 12–24 V power, K2 relay (switch output), RS-485 and 4–20 mA. Enlarge
JJY-YLD158DP housing dimension drawing, unit mm
Housing dimension drawing (unit: mm). Enlarge
Radar level gauge installation precautions and commissioning steps
Installation precautions and commissioning. Enlarge
Radar level gauge installation position and mounting angle
Installation position and mounting angle. Enlarge

Looking for the full range? Browse all radar level sensors →

Every file here is free — no registration, no forms. Files marked Download open straight away; product-specific documents are being updated and will be added shortly.

Downloads — JJY-YLD158DP

User Manual

Mechanical mounting, wiring, parameter configuration and the upper-computer software setup for the JJY-YLD158DP remote level indicator.

PDF · English · 2026-09

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Communication Protocol

Frame format and command set for the RS-485 interface. A custom text protocol or Modbus register map can be written for integration projects.

PDF · English · v1.0

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3D Model — module envelope (.stp)

STP solid of the indicator for enclosure and panel-mount design. Ask us for the exact model if you need a different boss or thread.

STP · 2026-09

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Upper-Computer Configuration Software

Parameter setup, sampling-interval setting, range calibration, data logging and firmware upgrade from a Windows PC.

Windows 7 / 10 / 11 · ZIP · v2026.06

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RadarBLE — Bluetooth APP for Android

Search RadarBLE on Google Play, or install the APK. On-site pairing, output switching, configuration and live readings from your phone.

Download

RadarBLE — Bluetooth APP for iOS

Search RadarBLE in the App Store. On-site pairing, output switching, configuration and live readings from your iPhone

Download

Video: Radar Level Transmitters Operation Video

Full specification table — measuring range, blind zone, accuracy, beam angle, supply, current draw and dimensions on one page.

Coming soon

Video: RadarBLE APP operation

Pair the gauge, configure parameters and monitor readings from your phone.

▶ Watch on YouTube

Need Another Document?

Need a test report, a calibration certificate or a manual in another language? Call us and tell us what you need:

  • Phone: +86 400 189 9309 (General) / +86 18124514139 (Mobile)
  • Hours: 09:00–18:00 China Standard Time, Mon–Fri

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