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JiaJia Eye
JJY YLD0285DP
JJY YLD0285DP 80
JiaJia Eye

High-Pressure Radar Level Transmitter

Model JJY-YLD0285DP
Communication Mode 【RS485/Hart 4-20mA 】
Operating Voltage 【RS485:9–24V】 / 【/Hart 4-20mA:24V】
Average Current RS485:12V /20MA 】 / 【4-20mA :24V 3.3mA】
Accuracy / Beam Angle 【HART 4-20mA: 0.1% RS 485:±2mm】 /【Beam Angle ±2.75°】
Comm. Protocol Customizable Modbus / Text Protocol/HART
Range / Blind Zone 0.05–40m / Radar Blind Zone 5cm
Housing Material PC/Polycarbonate/304
Prot. Class / Temp IP67/ -40°C ~ 75°C
Mounting Thread DN50/DN80
Pressure Resistance 1 MPa
Configuration Software Windows Serial Port Debugger / Android & iOS — RadarBLE app
Temperature Display Supports temperature readout
Recommended Cable Diameter 6-12mm cable
Packaging Dims. & Wt.
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The JJY-YLD0285DP is an 80 GHz radar level transmitter built for flanged tank nozzles. It bolts onto a standard DN50, DN80 or DN100 flange in minutes, handles up to 1 MPa of process pressure for pressurized vessels and pipelines, and talks HART 4–20 mA or RS485 — ±2 mm over RS485, 0.1% on the 4–20 mA loop, across a 30 m range.

DN50 / DN80 / DN100 flange1 MPa pressureHART 4–20 mA / RS485✓ ±2 mm · ±2.75° beam✓ 30 m range · 5 cm blind zone

Key Features

DN50 / DN80 / DN100 flange — easy installation

Mounts straight onto a standard DN50, DN80 or DN100 flange with 8×M18 bolts — no adaptor, no custom fabrication. Drop it on the nozzle, tighten the bolts, wire it up, and the transmitter is level in minutes on new tanks or as a retrofit on existing flanged nozzles.

1 MPa pressure rating — for pressurized installs

Rated to 1 MPa (10 bar), so it measures reliably in pressurized tanks, vessels and pipelines where an open-air gauge cannot survive — from vented water tanks to sealed process vessels running several bar.

HART 4–20 mA and RS485 output

Pick the signal your system already speaks: a 2-wire 4–20 mA loop with HART for the control room, or RS485 (±2 mm, Modbus / text protocol configurable) straight into a PLC, RTU or data logger. Both are wired through the same cable gland.

Dimensions, Wiring & Installation

JJY-YLD0285DP 80 GHz radar level transmitter with DN50/80/100 flange and lens antenna
JJY-YLD0285DP — 80 GHz radar level transmitter on a DN50/80/100 flange with lens antenna. Enlarge
JJY-YLD0285DP dimension drawing, DN flange 200 mm with 8xM18 bolt holes, 100 mm housing
Dimension drawing — Ø200 mm flange, 8×M18 bolt holes, 100 mm housing. Enlarge
80 GHz radar level transmitter wiring diagram, HART 4-20 mA and RS-485 terminal connections
  4–20 mA Mode: DC24v+ → 4–20 mA+; 24v− → 4–20 mA−
RS-485 Wiring Mode: DC+ →9-24v; DC− →GND Enlarge
Radar level transmitter installation position and mounting angle guide
Installation position and mounting angle. Enlarge
Radar level transmitter installation precautions and commissioning guide
Installation precautions and commissioning. Enlarge

What’s in the Box

  • Flanged radar level transmitter main unit × 1
  • DN50 / DN80 / DN100 flange gasket × 1
  • Bolt and sealing-washer set × 1
  • User manual × 1
  • 0.5 m connecting cable × 1

Related Radar Level Transmitters

Frequently Asked Questions

Which flange sizes does it fit?

It mounts straight onto a standard DN50, DN80 or DN100 flange with 8×M18 bolts — no adaptor, no custom fabrication. Drop it on the nozzle, tighten the bolts, wire it up, and the transmitter is level in minutes on new tanks or as a retrofit on existing flanged nozzles.

What process pressure can it handle?

Rated to 1 MPa (10 bar), so it measures reliably in pressurised tanks, vessels and pipelines where an open-air gauge cannot survive — from vented water tanks to sealed process vessels running several bar.

Can I use HART 4-20 mA and RS485 at the same time?

Pick the signal your system already speaks: a 2-wire 4-20 mA loop with HART for the control room, or RS485 (Modbus-RTU, ±2 mm, or a custom text protocol) straight into a PLC, RTU or data logger. Both are wired through the same cable gland.

How accurate is it, and how close can it measure?

±2 mm on the RS485 output and 0.1 % of span on the 4-20 mA loop, across a 30 m measuring range. The radar blind zone is 5 cm and the beam angle is only ±2.75°, which keeps the reading clear of sidewalls and internal fittings.

How do I match the Modbus register map to my PLC?

Using the RadarBLE app (Android & iOS) / the WeChat mini program, we remap the transmitter’s Modbus registers to match the protocol your PLC already speaks — no PLC reprogramming and no downtime for your integrator.

What is the MOQ?

One unit. There is no minimum order quantity: a single evaluation unit, a 20-unit trial order and a 500-unit batch are all accepted. Quantities under 20 units ship directly from stock; 20–500 units are scheduled into production.

How fast is delivery?

1–20 units: dispatched within 2 working days from stock. 20–500 units: 1–4 weeks for a scheduled production run, depending on the current schedule. Customised versions follow exactly the same schedule — customisation does not extend the lead time.

Can range, thread and protocol be customised? Can I get a sample?

Measuring range, mounting flange (DN50 / 80 / 100), thread adapter, communication protocol and housing colour are all customisable. One free sample is provided — the buyer covers the freight.

What certifications do you hold?

ISO 9001:2015 (certificate 02426Q00028R101, valid until 2029-01-15). CE certification is in preparation.

Delivery & Samples

Sample or replacement unit: ships in 2 working daysStock is held for evaluation samples and urgent replacements — when a gauge has failed and the line is down, that is the difference between a two-day stoppage and a four-week one.
2working days
Samples and orders of 1–20 units — in stock

Dispatched within 2 working days of payment confirmation.

1–4weeks
Production runs of 20–500 units

Depending on the production schedule: 1 week when a run is already planned, up to 4 weeks at peak, followed by calibration, 48 h burn-in and waterproof testing.

Sameschedule
Custom range / protocol / housing

Customisation adds no extra lead time.

3D files — STP housing file for your enclosure design.
FORM E zero-duty — China–ASEAN certificate of origin; import duty can drop to zero for Vietnam, Thailand, Indonesia, Malaysia and the Philippines.
Private label — your brand on the housing and the datasheet.
Free sample: one standard unit free of charge, buyer covers freight.
MOQ: 1 unit — single evaluation orders are welcome.
Stock: standard version held in stock for 1–20 units.
Shipping: express air from Shenzhen, or consolidated sea freight for batch orders.
Lead time counts from payment confirmation, working days only.

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

Need full specifications or a custom OEM/ODM quote? Explore our Radar Level Sensor solutions or visit the manufacturer & OEM page.

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-YLD0285DP

User Manual

Installation, wiring, parameter configuration and echo setup for the flanged radar level transmitter.

PDF · English · 2026-09

Download

Communication Protocol

Frame format and command set for the RS485 version, plus the register map for the 4–20 mA HART version. A custom text protocol or Modbus register map can be written for OEM projects.

PDF · English · v1.0

Download

3D Model — housing envelope (.stp)

STP solid of the housing and DN flange for nozzle and tank-roof design. Ask us for the exact model if you need a different flange size.

STP · 2026-09

Download

Upper-Computer Configuration Software

Parameter setup, range and echo calibration, output scaling, temperature readout and data logging from a Windows PC.

Windows 7 / 10 / 11 · ZIP · v2026.06

Download

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, pressure rating, housing material and flange sizes 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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