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HD818 Tractor Auto-Steering System | ±2.5 cm RTK, ISOBUS

Name: HD818 Tractor Auto-Steering & Navigation System
Brand: JTILEP
SKU: HD818
Availability: InStock

Why It Pays

What guidance actually pays for

The same crooked pass gets re-billed every season — in seed, chemical and diesel.

The overlap you already pay for

A manually steered machine commonly re-covers 5–15% of ground on row-crop tillage and planting — invisible from the cab, which is why it survives season after season.

Guidance does not make the tractor faster. It removes the drift: the line is stored, not re-drawn at hour eleven.

Wasted seed and chemical — the double-covered strip takes a second full rate
Wasted diesel and machine hours — every overlap pass is a pass you did not need
Operator fatigue — supervision rather than continuous correction

±2.5 cmPASS-TO-PASS, RTK

5–15%TYPICAL OVERLAP BEFORE

0.1–25KM/H, PLANT TO HARVEST

HD818 display terminal, steering wheel assembly and HS-223A GNSS receiver — the guidance kit that removes the overlap

Core Capabilities

Steer straighter. Waste less.

Four things the HD818 does, and what each is worth on the ground.

HD818 Auto Steering System platform overview banner

HD818 Auto Steering SystemBeyond Guidance, Driving Intelligent Agriculture

±2.5 cm RTK Accuracy

Repeatable centimetre-level passes. The HS-223A tracks every open GNSS band at once, so the fix stays Fixed rather than drifting to Float.

Six Correction Sources

Radio base, NTRIP, SBAS, BeiDou B2b-PPP, Galileo HAS, optional L-Band. Where there is no network, the satellite services remove the base station.

↻

Four Working Patterns

AB lines for open ground, A+ offsets for striped blocks, parallel curves for contours, circular for centre-pivot.

☰

14″ Terminal on Android 14

1920 × 1080, 800-nit display, eight-core processor, 8 GB RAM — split-screen guidance, cameras and job records at once.

How It Works

The four layers behind ±2.5 cm

Four layers from satellite to steering column.

From satellites to the steering column

Layer 01 · Satellites — all major constellations and bands tracked together, so a usable fix survives a blocked sky.
Layer 02 · Differential correction — raw positioning is metre-level. Corrections turn it into centimetres, by six routes: radio base, NTRIP, SBAS, BeiDou B2b-PPP, Galileo HAS, L-Band.
Layer 03 · Guidance logic — the line is stored, not re-drawn. Terrain compensation holds working width as the machine leans.
Layer 04 · Steering execution — a 7 N·m rated electric wheel motor drives the column, with manual take-over at any time.

HS-223A GNSS receiver and radio antenna assembly: the differential correction stage of the accuracy chain

Correction Sources

Six ways to get the fix

Six routes to a centimetre fix. Which one works depends on where the farm is.

HD818 terminal and steering wheel with the HS-223A receiver and radio antenna mounted on a test frame

Radio Base Station

HD818 terminal showing NTRIP login and correction source selection in the guidance interface

NTRIP & Network

On the Machine

Source	How it reaches you	Best for
Radio base station	Your own base on a surveyed point, broadcasting at 410–470 MHz	No cellular coverage; fleets working one farm
NTRIP	Network corrections over the mobile data link, entered as server / port / mount point	Regions with an established CORS network — the usual first choice
SBAS	Free satellite-based augmentation, received directly by the receiver	Wide-area work where sub-metre is enough; no subscription
BeiDou B2b-PPP	Precise point positioning delivered over the BeiDou B2b signal	No network and no base station — coverage is regional
Galileo HAS	High-accuracy service broadcast within the Galileo signal	As B2b-PPP; availability set by the service operator
L-Band optional	Commercial satellite correction subscription, received by the same antenna	Fields beyond any terrestrial network, at a subscription cost

Do not compare these numbers with the RTK figure. ±2.5 cm is what the HD818 achieves on RTK — a terrestrial or NTRIP correction. The satellite services (B2b-PPP, HAS, L-Band) are alternatives where RTK infrastructure does not reach; their accuracy and coverage are set by the service provider and vary by region.

Implement Control

ISOBUS, in two levels

ISOBUS is a stack, not a feature. The HD818 implements two of its levels — UT and TC-SC.

Which level you need

UT — Universal Terminal: the implement appears as a screen on the HD502B terminal, replacing its own monitor.
TC-SC — Section Control: switches implement sections automatically on the line — no double-application at headlands, no skips between.

Also: Steer-Ready. Machines with factory auto-steering prep connect straight through — no hydraulic modification, no added motor.

Guidance Patterns

Four patterns, four field shapes

A straight AB line is right on open ground and wrong on a contour block. The HD818 stores all four, switched per field.

AB Lines · A+ Lines · Parallel Curves · Circular Curves

AB Lines

Two points set a reference line; every following pass is parallel to it. The default on open, rectangular ground.

A+

A+ Lines

An offset variant that adds a shift to the reference line — for matching a bed, a fence or a previous pass.

∿

Parallel Curves

For contours and irregular boundaries, where a straight line would drift off the working width.

◉

Circular Curves

Concentric passes for centre-pivot irrigation and circular blocks, from a stored centre point.

Why the HD818

Built to fit the fleet you already own

The HD818 is a retrofit, not a reason to replace a machine.

Retrofit, not replacement

Wide machine compatibility — 0.1–25 km/h covers planting through harvest. Tractors, harvesters, self-propelled sprayers; front-wheel, rear-wheel, articulated and tracked steering.
Broad protocol support — ISOBUS talks to your existing implements and sensors.
Expandable smart implements — add variable-rate spraying, land levelling or visual guidance on the same platform, not another console.
Dealer-friendly installation — documented procedure and wiring, so local workshops can fit it without factory support on site.
Project-ready supply — MOQ 1 for trial orders, volume pricing and OEM branding for distributors and programmes.

HD818 terminal showing guidance settings on the same platform used by every optional module

Optional Modules

Six ways to extend the platform

The HD818 ships as an auto-steering kit. Everything below is quoted separately.

HD818 standard package components and the six optional upgrade modules

Standard Package & Optional ModulesEach optional module is quoted as its own line

HD502B display terminal showing guidance task selection across implements

One Terminal, Every TaskGuidance, implement control and job records on the same screen

HM200 Electric Steering Motor

HS-223A GNSS Receiver

HD502B terminal interface: job setup, coverage map and implement control

HD502B Display Terminal

Multi-Function Joystick

🎮

Multi-Function Joystick

Key functions on one touch, including an AUTO key. Magnetic attachment leaves the cab clean when removed.

360

360° Surround View

Fisheye cameras give an omni-directional view with no blind spots. 1280 × 720P at 25 FPS, 210° horizontal FoV, IP67. An independent module — not part of ISOBUS, quoted separately.

▼

Land Levelling System

Visualised elevation map with GNSS + INS fusion and single-point slope setup. Single- and dual-channel levellers.

📷

Visual Guidance

Crop-row detection and density sensing during the growing stage, reducing implement damage to standing crops. 640 × 480 global shutter, IP67.

💧

Smart Spraying System

A sectioned control valve holding the rate on the line and cutting it at the overlap — reducing chemical cost rather than adding a pass.

☷

ISOBUS

Plug-and-play with multi-brand implements and automatic section control. Two levels: UT and TC-SC.

What Arrives

The configuration list, in full

Tender documents ask for the packing list. Here is ours, item by item.

HD818 kit contents laid out: steering wheel assembly, display terminal, GNSS receiver, wiring harness, brackets, antenna and documentation

Every Kit, Same ListPacked against a documented list — check it against your own configuration on arrival

HD818 bill of materials page listing every main component and mounting item

Three-Piece CoreTerminal, steering assembly and receiver in every kit

Main components	Installation & mounting hardware
HD502B tablet assembly (14″) × 1	Tablet fixing kit (U-bolt) × 1
HS-223A receiver assembly × 1	T-shaped motor bracket 100 mm × 1
HM100 steering wheel assembly × 1	T-shaped motor bracket clamp ring A + B (R22) × 1 each
C-shaped motor bracket × 1	T-shaped motor bracket accessory kit × 1
C-shaped bracket universal joint × 2	L-shaped motor bracket × 2
L-shaped motor bracket (V1.0) × 2	L-shaped mount bracket accessory kit (V2.0) × 1
Angle sensor assembly × 1	Motor holder No.2 screw set (V2.0) × 1
Double socket arm + round ball base + U-bolt base × 1	Self-drilling screw kit × 1
Rear camera × 1	HM100 motor installation hardware kit × 1
HD418 main harness × 1	Cable tie × 20
Gyroscope cable × 1 · extension × 1	Electrical tape × 1
Radio antenna × 1	Phillips screwdriver × 1
User manual × 1 · quick guide × 1	Packing list × 1
Warranty & certificate of conformity card × 1	—

The crate ships with the tools needed to fit it — screwdriver, cable ties and tape included rather than assumed. If any item is missing on arrival, tell us before installation starts.

Installation

Six steps, no factory visit

The kit is designed to be fitted by your own workshop or local dealer. Nothing here requires a factory technician on site.

From crate to first pass

1 · Confirm the model — send us the tractor brand, model and year; we match the bracket kit before shipping.
2 · Mount the wheel motor — the HM100 assembly fits the existing steering column with the supplied brackets.
3 · Fit the receiver — HS-223A and radio antenna on the cab roof, harness run inside.
4 · Wire the control unit — HD418 main harness and documented wiring diagram.
5 · Calibrate & set the line — wheel-angle calibration, then store your first AB line.
6 · Work the field — run a test pass and check the overlap against your previous practice.

HD818 terminal and steering wheel assembly set up with the GNSS receiver and radio antenna above

Specifications

HD818 at a glance

The figures a tender document or dealer comparison asks for first — component by component.

Item	Specification
Positioning accuracy	±2.5 cm working accuracy (RTK) Requires a base station, NTRIP service or one of the satellite correction services listed below
Receiver RTK accuracy	8 mm + 1 ppm (RMS) HS-223A receiver figure, horizontal. Not directly comparable with the working accuracy above — see the note below the table
Standalone accuracy	Single point < 1.5 m (RMS) · DGNSS < 0.4 m (RMS)
Correction sources	Radio base · NTRIP · SBAS · BeiDou B2b-PPP · Galileo HAS · L-Band (optional) Six options — the satellite-delivered services remove the base station entirely
Constellations & bands	GPS (L1/L2/L5) · GLONASS (L1/L2/L3) · BeiDou (B1/B2/B3, B1C/B2a/B2b) · Galileo (E1/E5a/E5b/E5AltBOC/E6) · QZSS · SBAS · IRNSS · L-Band
Working speed	0.1–25 km/h Covers planting, spraying and harvest speeds on the same guidance line
Steering types supported	Front-wheel · rear-wheel · articulated · tracked Electric motor or hydraulic, on the same platform
Machine compatibility	Tractors · harvesters · self-propelled sprayers Bracket kit matched to your model before shipping
Guidance patterns	AB lines · A+ lines · parallel curves · circular curves · one-click headland turn
ISOBUS	UT · TC-SC Universal Terminal and automatic section control
Steer-Ready machines	Factory auto-steering prep supported — connects without hydraulic modification or an added steering motor
Cloud	Data synchronisation with the HD Digital Agriculture Platform Job records and coverage maps follow the account, not the terminal

Display terminal — HD502B

Item	Specification
Screen	14″ LCD · 1920 × 1080 · 800 nits · 10-point capacitive touch
Processor	Eight-core Cortex-A73 + Cortex-A53
Memory & storage	8 GB LPDDR4 + 64 GB eMMC
Operating system	Android 14.0
Input voltage	9–36 V DC
Connectivity	Wi-Fi 2.4G + 5G (802.11 a/b/g/n/ac) · Bluetooth 5.0 (BR/EDR + BLE) · Global 4G
Camera inputs	720P × 2 Two feeds side by side on the terminal — implement and rear view together
Audio & controls	Integrated speaker × 2 · power button only
Ingress protection	IP67
Operating temperature	−20 °C ~ +70 °C · storage −30 °C ~ +80 °C
Dimensions & weight	L 350.5 × W 220 × D 32.5 mm · 2 kg

GNSS receiver — HS-223A

Item	Specification
Input voltage	9.6–14.4 V DC
Horizontal accuracy	RTK 8 mm + 1 ppm (RMS) · DGNSS < 0.4 m · single point < 1.5 m
Radio	410–470 MHz · 25 kHz channel spacing
Radio protocols	TRIMATLK · TRANSEOT · TRIMMARK3
Ingress protection	IP67
Operating temperature	−20 °C ~ +70 °C · storage −40 °C ~ +85 °C
Dimensions & weight	L 182.8 × W 175 × D 71 mm · 0.8 kg

Electric steering motor — HM100 / HM200

Item	Specification
Working voltage	9–18 V DC
Output torque	7 N·m rated · 15 N·m maximum
Nominal power	50 W
Maximum rotation speed	100 RPM
Motor dimensions	Min. φ181.5 mm · max. φ250 mm · H 54 mm
Steering wheel	φ390 mm · H 60 mm · leather-wrapped grip standard
Ingress protection	IP65 The motor is IP65; the terminal and receiver are IP67
Operating temperature	−25 °C ~ +60 °C · storage −40 °C ~ +70 °C

Optional modules

Module	Key figures
360° Surround View	Fisheye 1280 × 720P 25 FPS · D 210° / H 210° / V 125° ± 3° · 9–16 V DC · −20 ~ +70 °C · IP67 Independent add-on — not part of ISOBUS, quoted as its own line
Visual Guidance	Global-shutter sensor · 640 × 480 · range 0.5–32 m (optimal 0.5–20 m) · 12 V DC · 6.6 W · 320 × 178 × 35 mm · 600 g · IP67
Land Levelling System	Visualised elevation map · GNSS + INS fusion · single-point slope setup · single- and dual-channel levellers
Smart Spraying System	Sectioned spray control valve · rate holding on the guidance line
Multi-Function Joystick	One-touch function keys including AUTO · magnetic attachment

Two accuracy numbers, and why both are published. 8 mm + 1 ppm (RMS) is the HS-223A receiver’s own positioning performance under RTK, measured at the antenna. ±2.5 cm is the working accuracy of the whole machine — it also contains the steering mechanism, the linkage and the implement. Neither should be compared with the satellite-delivered services, whose accuracy is set by the service provider.

Commercial terms — pricing, lead time, payment terms and warranty — are confirmed on the proforma invoice and contract.

Certification

What the HD818 actually holds

Held documents, with the certificate holder named for each.

CECE — Radio Equipment Directive 2014/53/EU

✓Certificate no. ICAS-25110026-02

HDStyle no. HD818 listed on the certificate

QOther documents — on request

Read this before you put the HD818 in a tender.
The CE verification of conformity for the HD818 auto-steering system (certificate no. ICAS-25110026-02, dated 16 January 2026) is issued to Heilongjiang Huida Technology Co., Ltd., the manufacturer of the Auto Steering System product family, under which style no. HD818 is listed. Xuzhou Jitian Intelligent Equipment Co., Ltd. holds written authorisation dated 11 September 2026 to reference that certificate for the marketing and sale of this product range, including on this website.

Two limitations are printed on the certificate itself and we repeat them here rather than burying them: the verification of conformity was issued on a voluntary basis and does not by itself imply that every essential requirement listed in the Declaration of Conformity is met; and placing this product on the European market may additionally require EC/EU-type examination by an appropriate notified body. If your programme requires notified-body documentation, tell us at the enquiry stage — it changes the lead time.

Certificates and test reports are issued for specific configurations and markets. Anything not listed here is documentation we do not yet hold, and we will say so rather than defer the question.

HD818 — frequently asked

Will the HD818 fit my tractor?

It is a universal retrofit covering the vast majority of mainstream tractor brands, plus harvesters and self-propelled sprayers. Front-wheel, rear-wheel, articulated and tracked steering are all supported, and Steer-Ready machines connect straight through. Send us your machine brand, model and year — we confirm the bracket kit before you order.

Do I need a base station or CORS account?

For full RTK accuracy, yes — but there are six routes to a correction, not one. Alongside a local radio base and NTRIP over the mobile network, the HS-223A also accepts SBAS, BeiDou B2b-PPP, Galileo HAS and optional L-Band, none of which need a base station or a network. Their accuracy and coverage are set by the service provider and vary by region, so tell us where you operate.

The spec sheet says 8 mm + 1 ppm, but the page says ±2.5 cm. Which is right?

Both — they measure different things. 8 mm + 1 ppm (RMS) is the HS-223A receiver’s positioning performance under RTK, measured at the antenna. ±2.5 cm is the working accuracy of the complete machine once the steering mechanism, linkage and implement are included. Neither should be compared with the satellite correction services, whose accuracy is the service operator’s figure, not ours.

What ISOBUS level does the HD818 support?

Two: UT (the implement appears on the HD502B terminal) and TC-SC (automatic section control). UT removes an extra monitor from the cab; TC-SC is where input savings begin. Task records and prescription-map variable rate are not part of this configuration.

What does the CE certificate cover, and in whose name?

The verification of conformity (certificate no. ICAS-25110026-02) is issued to Heilongjiang Huida Technology Co., Ltd., the manufacturer of the Auto Steering System family, and HD818 is a listed style number. We hold written authorisation to reference it for marketing and sale of this range. The certificate is voluntary-basis and notes that EU market placement may additionally require EC/EU-type examination by a notified body.

Is 360° Surround View included?

No. It is an independent add-on module, quoted separately, and is not part of ISOBUS functionality. Order the HD818 with or without it — and if you are comparing quotations, list it as its own line so the comparison is like for like. Five further modules are available on the same platform: multi-function joystick, ISOBUS, land levelling, visual guidance and smart spraying.

How long does installation take, and who can do it?

It is a workshop job: the kit is designed to be fitted by your own mechanics or a local dealer, with documented wiring, a full bracket set and a calibration procedure. Tell us your machine model and we will confirm the bracket kit and send the installation documentation with the quotation.

Can we order with our own brand, and what is the MOQ?

MOQ is 1 unit, so you can trial a single kit before scaling; for distributor and project volumes we quote tiered pricing on request. Colour and logo OEM / ODM are available — send us your artwork and target configuration for a quotation.

Own the line. Every single pass.