SENT Speed Limiter

The AutoKontrol SENT Speed Limiter is designed for the newest generation of commercial vehicles that use SENT (Single Edge Nibble Transmission) protocol for throttle position sensing. As the automotive industry transitions beyond traditional drive-by-wire to SENT-based sensors, AutoKontrol leads the market with a purpose-built, certified solution.

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What is SENT and Why Does It Matter?

SENT (Single Edge Nibble Transmission) is a digital communication protocol used by the latest vehicle throttle position sensors. Unlike older analogue or PWM (Pulse Width Modulation) signals, SENT transmits throttle position data as a series of digital “nibbles” — providing higher accuracy, better noise immunity, and faster response times.

Major vehicle manufacturers including DAF, Mercedes, Scania, Volvo, and MAN have adopted SENT sensors in their Euro VI and later platforms. This means traditional drive-by-wire speed limiters that intercept analogue or PWM throttle signals cannot work on these newer vehicles. A SENT-specific speed limiter is required.

AutoKontrol’s SENT Speed Limiter was developed in-house specifically for this protocol. It is not an adapter or workaround — it reads the SENT signal natively and controls vehicle speed with the same precision and reliability that fleet operators expect from our DBW and System 80 products.

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How the SENT Speed Limiter Works

The SENT Speed Limiter is installed between the vehicle’s throttle position sensor and the engine ECU. It monitors the SENT data stream in real time and, when the vehicle reaches the preset speed limit, modifies the throttle position signal to prevent further acceleration.

The system operates transparently — the engine ECU sees a normal SENT signal at all times. There are no error codes, no check engine lights, and no interference with other vehicle systems. The speed limit is factory-set and secured with a tamper-evident seal.

Key Technical Advantages

• Direct SENT signal processing — no analogue conversion, no signal degradation
• Sub-millisecond response time — faster than legacy PWM-based systems
• Full diagnostic transparency — no DTC codes generated, no ECU conflicts
• Backwards compatible — the same unit can also process PWM signals on dual-protocol vehicles

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Technical Specifications

Specification	Detail
Protocol	SENT (SAE J2716) — also supports PWM fallback
Throttle Type	SENT sensor (digital)
Speed Setting Range	20–120 km/h (factory-set)
Speed Accuracy	± 1 km/h at set speed
Response Time	< 1 ms
Power Supply	Vehicle 12V / 24V DC
Operating Temperature	-40°C to +85°C
Tamper Protection	Tamper-evident seal with unique serial number
Certifications	EU/ECE R89, UTAC, TÜV, VCA
Typical Installation Time	90–120 minutes
Warranty	2 years manufacturer’s warranty
Designed & Manufactured	Chorley, Lancashire, UK

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Which Vehicles Need a SENT Speed Limiter?

If your vehicle was manufactured after 2019 and has a Euro VI (or later) engine, there is a high probability it uses a SENT throttle sensor. The following manufacturers have widely adopted SENT across their commercial vehicle ranges:

• DAF — XG, XG+, XF (2021+), CF (2021+)
• Mercedes — Actros MP5, Arocs (2021+), new Atego
• Scania — Super range (2021+), all new-generation trucks
• Volvo — FH, FM, FMX (2021+), FE/FL (2022+)
• MAN — TGX, TGS, TGL (2020+ new generation)
• Iveco — S-Way, new Daily (2022+)
• Renault — T High, T, D, C range (2021+)

If you are unsure whether your vehicle uses SENT, contact our technical team for a free compatibility check.

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SENT vs DBW: Which Speed Limiter Do I Need?

Feature	SENT Speed Limiter	DBW Speed Limiter
Throttle type	SENT digital sensor	PWM / analogue electronic
Vehicle age	2019+ (Euro VI late / Euro VII)	2000–2020 (Euro III–VI)
Signal type	Digital nibble transmission	Pulse width or voltage
Best for	Latest-generation trucks and vans	Established electronic-throttle vehicles

Not sure? Many vehicles in transition use dual-protocol sensors. Our SENT Speed Limiter supports both SENT and PWM, making it a safe choice for mixed-age fleets.

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Frequently Asked Questions

What happens if I fit a DBW limiter to a SENT vehicle?

It won’t work. The DBW limiter expects a PWM or analogue signal. A SENT vehicle transmits digital nibbles that the DBW unit cannot interpret. You will get either no speed limiting or engine fault codes. Always verify your vehicle’s throttle protocol before ordering.

Can the SENT limiter be retrofitted to older vehicles?

The SENT limiter is designed for SENT-protocol vehicles. For older vehicles with analogue or PWM throttle signals, use our DBW Speed Limiter. For cable-throttle vehicles, use the System 80.

Is the SENT limiter more expensive than the DBW?

Pricing is comparable. The SENT limiter uses more advanced signal processing hardware, but AutoKontrol maintains competitive pricing across all product lines. Request a quote for your specific fleet requirements.