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 on a DN50/80/100 flange with lens antenna. Enlarge
Dimension drawing — Ø200 mm flange, 8×M18 bolt holes, 100 mm housing. Enlarge 4–20 mA Mode: DC24v+ → 4–20 mA+; 24v− → 4–20 mA−
RS-485 Wiring Mode: DC+ →9-24v; DC− →GND EnlargeInstallation position and mounting angle. EnlargeInstallation precautions and commissioning. Enlarge
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.
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.
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.