Understanding the technical landscape of Electronic Control Units (ECUs) is essential for anyone involved in modern automotive engineering or performance tuning. A comprehensive ECU datasheet provides the blueprint for a vehicle's "brain," dictating everything from fuel injection timing to advanced driver-assistance systems. This guide explores the diverse world of ECUs, from standard OEM modules to high-performance standalone units, highlighting the 30 best categories and specific models you should know. The Role of an ECU Datasheet A datasheet is more than just a list of specs; it defines the operational limits and capabilities of the unit. Key parameters typically found include: Microcontroller Architecture: The "core" processing power, often from suppliers like NXP , Renesas , or Infineon . Input/Output (I/O) Channels: Number of sensors and actuators the unit can handle (e.g., 7 inputs and 10 outputs on the FuelTech FT450 Go to product viewer dialog for this item. Connectivity: Support for protocols like CAN-Bus , LIN , and Ethernet for vehicle-wide communication. Protection Ratings: Environmental durability, such as an IP67 rating for moisture and dust resistance. 30 Best ECU Categories & Notable Models In modern vehicles, there isn't just one ECU; there are often dozens working in a networked ecosystem. Core Engine & Powertrain Management Engine Control Module (ECM/ECU): The primary unit for fuel, air, and spark management. Transmission Control Module (TCM): Optimizes gear shifts and power delivery. Fuel Injection Control Module (FICM): Specifically manages diesel or high-pressure injectors. Hybrid Control Unit (HCU): Orchestrates the transition between electric motors and internal combustion. Battery Management System (BMS): Critical for EV health and safety. Electronic Power Steering (EPS): Controls motor-assisted steering force. Safety & Chassis Control ABS Control Module: Prevents wheel lock-up during braking. Airbag Control Module: Triggers life-saving restraints in milliseconds. Electronic Stability Control (ESC): Corrects vehicle path during skids. Suspension Control Module (SCM): Adjusts dampers based on road conditions. Brake Control Unit (BCU): Manages advanced braking distribution. Body & Comfort Electronics Body Control Module (BCM): The hub for lights, locks, and windows. Climate Control Unit (CCU): Manages HVAC systems for cabin comfort. Door Control ECU: Handles localized power functions in each door. Wiper Control ECU: Automates rain-sensing and wiper speeds. ADAS & Autonomous Systems Adaptive Cruise Control (ACC) ECU: Uses radar to maintain following distance. Lane-Keeping Assist (LKA) ECU: Monitors lane markings for steering correction. Blind Spot Monitoring (BSM) ECU: Alerts drivers to unseen vehicles. Parking Assist ECU: Manages ultrasonic sensors for low-speed maneuvers. LiDAR/Camera ECU: The high-speed processing unit for environmental vision. Top Standalone & Aftermarket Units The BEST Aftermarket ECU For New Tuners? [HPA Q&A]
ECUs Datasheet: 30 Best Engine Control Units Reviewed The Engine Control Unit (ECU) is the "brain" of a modern vehicle, responsible for managing everything from fuel injection and ignition timing to emission controls and turbocharger boost. Whether you are a professional automotive engineer, a racing tuner, or an enthusiast looking to upgrade your vehicle's performance, understanding the technical specifications of an ECU—its datasheet—is crucial. This article explores the 30 best ECUs on the market, detailing what makes them top contenders by analyzing their datasheets, key features, and best-use applications. What to Look for in an ECU Datasheet Before diving into the top 30, it is essential to know which parameters on an ECU datasheet define its capability and suitability for your project: Processor Speed/Architecture: Determines how fast the ECU can compute fuel and ignition maps (crucial for high-RPM engines). Input/Output (I/O) Channels: Number of injector drivers, ignition drivers, and sensor inputs (analog, digital, VR). Communication Protocols: CAN bus compatibility for digital dashboards, OBDII port for diagnostics, and USB/Ethernet for tuning. Operating Voltage/Conditions: The voltage range (typically 12V–14V) and temperature tolerances. Data Logging Capabilities: Internal memory size for recording engine data. Protection Features: Absolute maximum ratings for voltage and temperature, and safety features like over-boost protection. 30 Best ECUs: Top Performance Units These units are categorized by their application, covering professional racing, high-performance street, and entry-level tuning. Top-Tier Professional Racing ECUs (Motorsport) MoTeC M1 Series (M130/M150/M170/M190): The industry standard for top-tier motorsport. These ECUs offer unmatched flexibility, allowing for custom firmware for almost any application. Bosch Motorsport MS 6.4/MS 7.4: The choice for many WEC, DTM, and high-level rally cars. Known for incredible robustness, integrated data logging, and advanced traction control. Magneti Marelli Marvel 6: Often found in Formula 1 and high-end racing, offering high-speed processing and specialized control algorithms. Life Racing F88 Series: Highly flexible, compact, and powerful ECUs designed for complex engine and powertrain management. Pectel SQ6/SQ7: A staple in rallying and specialized racing, renowned for its advanced torque management and electronic throttle control (drive-by-wire). EcuMaster EMU Pro: High-performance unit offering advanced features (like built-in wideband lambda and DBW support) at a more accessible price point than others in its class. Haltech Elite 2500: A versatile professional unit used in everything from drag racing to circuit racing. It boasts extensive I/O and user-friendly software. Link G4X Fury: Known for its high-speed processing and robust built-in features, such as 4-rotor engine support and dual CAN bus. AEM Infinity Series: Renowned for its massive processing power, making it excellent for complex drag racing setups with many inputs. Emtron KV Series: Features superior logging and processor speed, popular in Australian motorsports and high-boost applications. High-Performance Street & Circuit ECUs Haltech Elite 1500: A compact, powerful ECU ideal for 4 or 6-cylinder applications, retaining many features of the 2500 model. Link G4X Storm: A popular choice for high-performance street cars, offering great value and extensive features. EcuMaster EMU Black: A versatile unit known for excellent DBW control and built-in CAN bus capabilities. AEM Infinity 506: Designed for smaller engines but with the same powerful processor as its larger counterparts. Link G4X Xtreme: A mid-range, feature-rich unit aimed at serious street/circuit builds. Haltech Elite 750: An entry-level professional ECU that offers significant performance for smaller, less complex builds. Link G4X Atom II: Simple, reliable, and cost-effective, great for basic 4-cylinder engines. MaxxECU Race: A Swedish-engineered ECU offering built-in Android app integration and wideband lambda support. MaxxECU V2: Highly reliable, designed to replace factory ECUs on modern engines. ProEFI Pro128: Known for its safety features and advanced boost control, often used in high-horsepower street cars. Entry-Level & Enthusiast Tuning Speeduino (DIY): An open-source project, excellent for learners, DIY builders, and budget projects. Megasquirt-3 Pro: A powerful DIY unit with extensive tuning capabilities and community support. EcuMaster EMU Classic: The previous generation of EcuMaster technology, still a very capable entry-level option. Haltech Elite 550: A very basic ECU for simple carburetor-to-EFI conversions. Link G4X Monsoon: A cost-effective, wire-in ECU for straightforward applications. MaxxECU Mini: Perfect for 1-4 cylinder engines, keeping it simple yet capable. AEM EMS-4: A universal programmable ECU designed for smaller engines. MicroSquirt: A compact, affordable unit ideal for motorcycles and small engines. TuningPro ECU: A budget-friendly, entry-level unit focusing on basic fuel and ignition management. Megasquirt-2: A classic, reliable, and very affordable entry point into standalone tuning. Conclusion: Selecting the Right ECU Choosing from the "30 best" requires careful consideration of your engine's needs, budget, and desired features. For professional motorsport, MoTeC and Bosch are unmatched. For high-performance street cars, Link and Haltech offer excellent, reliable options. For enthusiasts and budget builders, EcuMaster and Megasquirt provide fantastic, cost-effective solutions. Always refer to the specific ECU's datasheet for your chosen model to ensure it meets your project's I/O and processor requirements. Are you looking to upgrade your ECU for a specific type of racing (e.g., drag, rally, circuit) or a street-driven car? If you tell me your engine setup and goals, I can help you narrow down which of these top 30 ECUs is the best fit for your build. Datasheet - an overview | ScienceDirect Topics
user wants a long article about "ecus datasheet 30 best". This likely refers to a list or review of ECUs (Electronic Control Units) with a focus on the "datasheet 30 best". I need to provide a comprehensive article. To do this, I need to gather information about ECUs, their datasheets, and perhaps a list of the 30 best ECUs. I should search for relevant information. I'll perform multiple searches to cover different aspects. search results for "ECU datasheet 30 best" seem to focus on specific models or components, not a list of the 30 best ECUs. The search for "best ECU 2025" shows results like market reports and specific products. The search for "ECU datasheet comparison" shows some comparison pages. The search for "automotive ECU datasheet list" shows some module lists and component databases. The search for "ECU datasheet download site:alldatasheet.com" shows individual component datasheets. 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The list will include a mix of aftermarket, OEM, industrial, marine, and EV ECUs. I'll structure the article with an introduction, a list of 30 ECUs with descriptions and key specs, a comparison table, and a conclusion. I'll need to cite sources appropriately. Now, I'll start writing the article. term "ECU datasheet 30 best" might seem like a cryptic search query at first glance, but for automotive engineers, tuners, and technicians, it represents a critical mission: finding the definitive technical specs for the 30 most important engine control units on the market. Whether you are building a professional race car, troubleshooting a fault code, or planning a high-performance engine swap, understanding the core specifications of these powerful computers is essential. This article serves as a comprehensive guide and reference. It brings together the technical specifications, or "datasheet" details, for 30 of the most renowned and capable ECUs. We've curated a list that spans industry giants like Bosch and MoTeC to innovative aftermarket leaders like Haltech, Link, MaxxECU, and FuelTech. For each, we will analyze its key features, I/O capabilities, processing power, and ideal applications to help you identify the best engine management system for your specific needs. Before diving into the list, let's ground ourselves with a quick look at the major players shaping the ECU industry. 👑 The Major Players in the ECU Market As of the latest market analysis in 2025, the global engine control modules market is a multi-billion dollar industry, projected to be worth nearly $9 billion. This market is dominated by a few key players that supply the vast majority of new vehicles worldwide. The top four manufacturers— Bosch Motorsport, Continental, Denso, and Delphi Technologies —hold about 60% of the total market share. Other significant manufacturers include ZF TRW, Magneti Marelli, Hitachi Automotive, and Mitsubishi Electric. While these giants produce the "OEM" ECUs found in most cars on the road, the aftermarket ECU landscape is where intense innovation and specialization take place for performance tuning. Leading aftermarket brands include MoTeC, Haltech, AEM, Link, Ecumaster, MaxxECU, Emtron, FuelTech, and HP Tuners , among others. These companies cater to a wide range of applications, from simple EFI conversions to professional motorsports and cutting-edge electric vehicle (EV) builds. 🏆 Top 30 Aftermarket, OEM & Motorsport ECUs: A Comprehensive List Now, let's explore the top 30 ECUs, categorized for clarity. The datasheet specifications for each unit have been compiled from official sources and technical documentation. 🏎️ Premier Aftermarket & Motorsport ECUs (1-15) These are the high-performance standalone ECUs favored by engine builders and professional tuners for their flexibility, advanced features, and raw processing power. | No. | Model | Manufacturer | Key Features & Specifications | | :--- | :--- | :--- | :--- | | 1 | M1 Series | MoTeC | Professional-grade, modular ECU. Features advanced data logging (up to 1000 channels at 1000Hz) and multi-level user access. Ideal for top-tier motorsport. | | 2 | M800 | MoTeC | Race-bred and versatile, suitable for almost any engine type, including modern engines with up to 12 cylinders. A benchmark in motorsport ECUs. | | 3 | Elite 2500 | Haltech | High-end, two-connector ECU. Handles 4-12 cylinders, drive-by-wire, and complex VVT systems. Features professional-level logging and advanced boost strategies. | | 4 | Elite 1500 | Haltech | Two-connector ECU designed for late-model performance and racing applications. Excellent for EFI conversions and engines with multiple variable camshafts. | | 5 | Elite 550 | Haltech | Powerful entry-level ECU with a waterproof case. Offers 4 fuel & ignition channels and a built-in 4 BAR MAP sensor. Great for basic 4-8 cylinder builds. | | 6 | Nexus R5/R3 | Haltech | Top-of-the-range ECUs with built-in Power Distribution Module (PDM) for simplified wiring and superior control. The R5 manages a 683 bhp engine. | | 7 | G4X / G4+ | Link | Highly popular and user-friendly platforms. Available in plug-in and wire-in versions. The G4+ Force GDI is specifically designed for Gasoline Direct Injection (GDI) engines. | | 8 | EMU BLACK | ECUMaster | A universal ECU known for its excellent value. Features a built-in 4 BAR MAP sensor and robust environmental protection (IP65), operating from -40 to 105°C. | | 9 | EMU CLASSIC | ECUMaster | Designed for complex engines (1-12 cylinders), controlling fuel, ignition, and auxiliary systems. Supports drive-by-wire throttles and VVT. | | 10 | PRO | MaxxECU | Complete engine control for up to 12 cylinders sequentially. Offers 16 injector outputs, 12 ignition outputs, and 12 EGT inputs for professional use. | | 11 | GEN2 RACE | MaxxECU | Ultimate ECU for tuners and racers, providing granular access to all engine data. Designed for applications where every millisecond counts. | | 12 | STREET | MaxxECU | A great entry point, supporting up to 6 cylinders sequentially. Features a built-in 400kPa MAP sensor and direct wideband lambda input. | | 13 | FT700PLUS | FuelTech | A powerhouse with built-in GPS/accelerometer, 64 GB of onboard storage, and Wi-Fi connectivity. Handles up to 1,024 data channels for comprehensive monitoring. | | 14 | FT550 | FuelTech | An all-in-one system featuring EFI, an integrated dashboard, data acquisition, and power management. Includes GearController for power-shifts and a gyroscope. | | 15 | FT450 / FT500 | FuelTech | The starting point for the FuelTech range. Real-time programmable ECUs that are both basic yet powerful, starting at an accessible price point. | 🏭 OEM & Tier-1 Supplier ECUs (16-24) These are the control units found in millions of production vehicles from leading automotive manufacturers. | No. | Model (Family) | Manufacturer | Key Features & Specifications | | :--- | :--- | :--- | :--- | | 16 | MS 6.3 EVO | Bosch Motorsport | High-end ECU for gasoline engines (up to 12 cylinders). Features a powerful floating-point processor and a high-end FPGA for maximum flexibility. | | 17 | MS 25 Sport | Bosch Motorsport | ECU designed for diesel engines with up to 8 cylinders, using Bosch solenoid injectors. Developed with MATLAB/Simulink. | | 18 | EDC17 Family | Bosch | A hugely popular family of diesel ECUs (e.g., EDC17C46, EDC17CP44). Manages engines for many brands, including Audi, Seat, and Volkswagen. | | 19 | MED17 Family | Bosch | Standard ECU for many gasoline engines, managing direct fuel injection and forced induction. | | 20 | MD1CP | Bosch | Latest-generation ECU for modern diesel engines, offering significant performance and efficiency optimization potential. | | 21 | PCR2.1 / SIMOS | Continental (Siemens VDO) | Common ECUs found in Volkswagen Group vehicles, managing both diesel (PCR2.1) and gasoline (SIMOS18) engines. | | 22 | DCM6.2 / DCM3.5 | Delphi (BorgWarner) | Robust ECUs found in various diesel applications, including the VW Crafter and Ford Galaxy. The DCM3.5 is known for its widespread use in PSA and Ford TDCI platforms. | | 23 | SID212 / SID807 | Continental | Modern diesel ECUs for Ford EcoBlue engines. The SID212 features advanced Euro 6 emissions controls, while the SID807 offers higher processing power. | | 24 | B7N-8591A-XX | Denso | An ECU used on YAMAHA MT09 Euro 5 motorcycles. Demonstrates Denso's reach into powersports and two-wheeled applications. | 💡 Specialized & Niche ECUs (25-30) This section covers ECUs for specific applications like classic cars, electric vehicles (EVs), and industrial or marine use. | No. | Model (Family) | Manufacturer | Key Features & Specifications | | :--- | :--- | :--- | :--- | | 25 | Infinity 708 | AEM | A high-performance standalone ECU. Its airflow-based tuning model simplifies start-up and speeds up the tuning process by eliminating many traditional lookup tables. | | 26 | S12 / S7D | Syvecs | The S12 is a top-of-the-range ECU with 50 outputs. The S7D is designed specifically for modern Direct Injection (DI) high-performance engines, managing twin drive-by-wire and complex VVT. | | 27 | Ignitron | New Zealand | A rising star, built to copy the BOSCH Motronic ME 7.5 ECU. It's a perfect plug-and-play upgrade for vehicles using that specific OEM platform. | | 28 | UMA M9 | UMA Racing | A popular plug-and-play (PNP) ECU for Southeast Asian racing, notably for Yamaha MX King and Honda GTR150. Features easy smartphone tuning. | | 29 | CORE EV / EAORA10 | HP Tuners / Ecotron | For the future of performance: The HP Tuners CORE EV is a powerful VCU for EV conversions. The Ecotron EAORA10, powered by NVIDIA Orin, is designed for Level 3 & 4 autonomous driving. | | 30 | V88 / V44 Marine | Link Engine Management | The V44 Marine is ideal for small watercraft and snowmobiles, while the V88 Marine is suited for V8 powerboats and offshore racing boats. Conformal coated for marine environments. | 🔍 A Detailed Look at Datasheet Specs To help you make a truly informed decision, let's compare four of the most popular aftermarket ECUs side-by-side, focusing on the technical details that matter most. | Feature | Haltech Elite 2500 | MoTeC M1 Series | ECUMaster EMU BLACK | MaxxECU PRO | | :--- | :--- | :--- | :--- | :--- | | Processor | High-speed automotive-grade | Powerful FPGA & Digital Core | AECQ100 Grade2 | Up to 12 cylinders sequential | | Operating Voltage | 6-28V | 6-30V | 6-22V (ISO 7637 transient protection) | Not explicitly stated | | Operating Temp | -20°C to 85°C | -30°C to 85°C | -40°C to 105°C | Not explicitly stated | | Fuel Injectors | 8 Low-Z / High-Z | Up to 24 Low-Z / High-Z | 16 Low-Z or High-Z | 16 Low or High-Z | | Ignition Outputs | 8 Logic / High Current | Up to 12 Logic | 12 Logic | 12 Logic | | Aux Outputs | 16 Configurable | Up to 32 Configurable | 14 High-Current / 8 Low-Current | Not explicitly stated | | Digital Inputs | 16 | Up to 32 | 12 (incl. 4x Digital Frequency) | Not explicitly stated | | Analog Inputs | 16 (12-bit) | Up to 32 (12-bit to 16-bit) | 18 (8x 0-5V, 10x 0-15V) | Not explicitly stated | | Lambda Control | Yes (external) | Yes (external) | Yes (built-in wideband controller) | Yes (direct wideband input) | | Internal Data Logging | Yes (2MB) | Advanced (up to 1000Hz) | Yes (32MB) | Yes | | Drive-by-Wire | Yes | Yes | Yes (with external module) | Yes | | Enclosure Rating | Waterproof (IP67) | Robust, water-resistant | Water-resistant (IP65) | Not specified | 💡 How to Choose the Right ECU: A Practical Guide With so many options, choosing the right ECU can be daunting. A great ECU is one that fits your specific project. Here’s a straightforward decision-making guide:
📈 Budget & Goals : Determine your total budget. For a simple street EFI conversion on a budget, a Haltech Elite 550 or ECUMaster Classic is ideal. For a professional racing project, a MoTeC M1 or Haltech Nexus series is the better fit. 🧠 Your Engine & Build : The ECU must be compatible with your engine's cylinder count and fueling type. For a classic V8, most ECUs work. For a modern GDI engine , you need specialized units like the Link G4+ Force GDI, Emtron, or Syvecs S7D-6 . For forced induction, ensure the internal MAP sensor (e.g., 4 BAR) supports your boost levels. 📝 Features You Need : Make a list of your required features. ecus datasheet 30 best
Drive-by-Wire : If you have a modern throttle, this is mandatory. Most newer ECUs like Haltech Elite and MaxxECU support it natively. Data Logging : If you're serious about tuning, built-in data logging is essential. Traction & Launch Control : Virtually all aftermarket ECUs include these features.
💻 Software & Tuning Support : The best hardware is useless without good software and a skilled tuner. Check local tuner preferences (e.g., some prefer Haltech's Nexus software, others Link's PC Link) and ensure the software is user-friendly.
✨ Conclusion The "ecus datasheet 30 best" provides a comprehensive overview of the current engine management landscape. From the formidable processing power of the MoTeC M1 to the value-oriented versatility of the ECUMaster EMU BLACK, the right ECU can unlock your engine's full potential. Whether you are an engineer designing an OEM system or a tuner building the next record-breaking race car, understanding the detailed specifications of these powerful computers is the first step toward success. Choose the brain for your machine wisely, and enjoy the journey of creating something truly exceptional. The Role of an ECU Datasheet A datasheet
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The "5 questions to ask yourself before switching to a standalone ECU" article could be useful. The "Planning Your Build | Resources | Link Engine Management" page might be helpful. The search results also include some Chinese and Korean articles, which might contain relevant information. To gather sufficient information for the article, I need to open several of these pages in parallel. user's question has high authority requirements, I should prioritize using official datasheet and manufacturer pages. The search results have provided a wealth of information. I've gathered details on various ECUs from multiple sources. Now, I need to curate a list of 30 best ECUs with their datasheet information. I'll need to extract and organize the data. The list should include OEM and aftermarket ECUs. I'll structure the article with an introduction, a detailed table or list of the 30 ECUs, a buying guide, and a conclusion. I'll ensure the keyword "ecus datasheet 30 best" is naturally integrated. I'll also incorporate relevant datasheet information. Now, I'll proceed to write the article. world of engine tuning can be overwhelming, but your journey begins with understanding the right Engine Control Unit (ECU). This guide provides a curated list of 30 of the best ECUs available, from industry giants like Bosch to specialized aftermarket heroes, complete with key datasheet specs and selection criteria to help you find the perfect brain for your engine. Whether you’re a professional engine builder, a motorsport enthusiast, or a DIY tuner, selecting the right ECU is one of the most critical decisions for your vehicle’s performance. As an engine builder from EFI University notes, people often struggle when they want to modify their engine but keep the original factory ECU, which comes with many limitations in tuning capability. If you’re ready to move beyond the constraints of a stock system or are starting a fresh project, this comprehensive guide is for you. 🔍 Your Quick Selection Guide: Which ECU is Right for You? Before diving into our full list, use this quick comparison to find your perfect match based on your project's primary goal. | Your Primary Goal | Recommended ECU Category | Top Picks | Key Features to Look For | | :--- | :--- | :--- | :--- | | 🏆 Maximum Performance / Pro Racing | High-end Motorsport | MoTeC M1, Emtron, Bosch MS 6.1 | Advanced traction & launch control, high-speed data logging, sophisticated injection strategies, ultra-high processing power. | | 🔧 Custom Builds & Tuning Flexibility | Premium Standalone | Haltech Elite 2500, MaxxECU, Ecumaster PRO | Extensive I/O, Drive-by-Wire (DBW), multiple injection strategies, user-friendly tuning software, and great community support. | | 💰 Best Value / DIY Projects | Budget to Mid-Range Standalone | Megasquirt, Emerald K6, Ecumaster CLASSIC, Microtech LT Series | Lower cost, solid feature sets for common engines, strong community support, and is often easier for DIY enthusiasts. | | 🚗 OEM Replacement / Upgrades | Major Automotive Suppliers | Bosch (EDC/MED), Marelli PFI, Delphi, Denso | High reliability, OEM-grade diagnostics, compliance with safety standards (ISO 26262 ASIL), and proven in millions of vehicles worldwide. |
30 Best ECUs with Datasheet Specs Here is a list of the 30 best Engine Control Units, categorized by their primary function in the automotive world. 🔧 The Major OEM Manufacturers (For Production & Replacement) These are the brains behind most vehicles on the road, from daily drivers to high-end production cars. 1. Bosch Motorsport MS 6.1 (Gasoline)
Best For: Motorsport, up to 12-cylinder gasoline engines. Key Specs (Datasheet): Connectivity: Support for protocols like CAN-Bus , LIN
Processor: Dual Core 667 MHz, FPGA for ultimate performance. Operating Voltage: 6 to 18 V. Inputs: 21 analog inputs, 6 dedicated for throttle control; 10 digital inputs, and 4 knock sensor inputs. Outputs: 12x injection (2.2A) for high-impedance injectors; 12x ignition control; 2x H-Bridge for electronic throttle. Physical: Aluminum housing, 196 pins; 226 x 181 x 44 mm; approx. 1,086g; IP54 protection. Environment: -20 to 80°C operating temperature. Data Logging: 4GB internal memory (expandable to 8GB).
2. Bosch Motorsport MS 25 Sport (Diesel)