Ch 24: Technical Specifications, Production Process, and Applications

Types of CH 24 Controllers and Monopoints

The CH 24 family of aviation control systems includes a range of specialized devices designed to meet diverse operational needs, including flight control precision, redundancy, and compatibility with various aircraft systems. These devices are commonly used in both general aviation and business jets, supporting critical functions such as remote control input, altimetry transmission, and system monitoring. Below is a detailed breakdown of the most widely used CH 24 variants.

CH 24-7

A versatile 24-channel handheld controller with full expandability and advanced flight control features.

Key Features

• 24-channel base with expansion up to 42 channels
• Compatible with all 3D transmitters and widebody aircraft
• Progressive joystick axes for smooth, precise control
• Lightweight, ergonomic design with weather-resistant casing
• Operates on 2.4 GHz frequency with up to 10 km range

Considerations

• Higher complexity may require training for new users
• Premium pricing due to advanced capabilities
• Larger footprint compared to single-channel units

Best for: Helicopter and fixed-wing UAV operations, remote pilot stations, and advanced flight training systems

CH 24 Monopoint

A single-channel altimetry transmitter designed for simplicity and integration with certified avionics.

Key Features

• Dedicated single-channel altitude data transmission
• BNC connector for secure RF signal transfer
• Compatible with TSO/ETSO-certified aircraft systems
• Transmits altitude, vertical speed, and system status
• Ideal for basic altimeter input in non-complex aircraft

Limitations

• Limited to one data channel (no multi-function support)
• Not suitable for systems requiring redundancy
• Primarily supports Cessna and Citation series platforms

Best for: Light aircraft, single-engine planes, and legacy avionics upgrades

CH 24 Dual Monopoint

An enhanced altimetry solution featuring dual-input redundancy for improved safety and accuracy.

Key Features

• Dual-input system for redundancy and truth monitoring
• Simultaneous BNC and RCA connectors for flexible integration
• Ensures reliable altitude data in critical flight phases
• Supports cross-checking between primary and backup sensors
• Used in high-integrity avionics environments

Considerations

• Higher cost than single monopoint units
• Requires additional wiring and calibration
• Overkill for non-critical or recreational aircraft

Best for: Business jets, high-performance aircraft, and operations requiring FAA/EASA compliance with redundant systems

Expert Tip: When integrating CH 24 Monopoint or Dual Monopoint units, ensure proper shielding and grounding of BNC connections to prevent RF interference, which can affect altimeter accuracy and ADS-B performance.

Understanding the differences between CH 24 models is essential for selecting the right system based on mission requirements, aircraft type, and regulatory standards. Whether you're upgrading a light aircraft or configuring a high-performance jet, the CH 24 series offers scalable solutions that enhance both safety and operational efficiency.

Function, Features, and Design of the CH 24 Altimeter Transmitter

The CH 24 is a high-performance avionics instrument engineered to deliver precise and reliable altitude data for a wide range of aircraft. As a critical component in modern flight systems, the CH 24 enhances situational awareness and operational safety by ensuring accurate altimetry under diverse flight conditions. Its advanced design supports both commercial and general aviation platforms, making it a trusted solution in safety-critical environments.

Core Function: Precision Altimetry and Signal Transmission

At its heart, the CH 24 functions as an altimeter transmitter, converting atmospheric pressure into accurate altitude readings and transmitting this data via one or two independent output channels. This capability is essential for maintaining assigned flight levels, enabling terrain awareness, and supporting automated flight control systems.

The dual-channel model provides a critical layer of redundancy—ensuring continued operation even if one channel experiences failure or signal degradation. This makes the CH 24 particularly suitable for aircraft operating in demanding environments or those requiring compliance with stringent safety protocols, such as IFR (Instrument Flight Rules) or RVSM (Reduced Vertical Separation Minimum) operations.

Two-Channel Altimetry

The CH 24’s dual-channel transmission system enables simultaneous output of altitude data through separate signal paths. This redundancy ensures system integrity—if one channel fails or delivers inaccurate readings, the second channel maintains reliable data flow to flight instruments, transponders, or autopilot systems.

This feature is especially valuable in multi-crew or high-altitude operations where data consistency is paramount. It also supports integration with dual-redundant avionics architectures, enhancing overall system fault tolerance.

Monopoint and Dual Monopoint Configurations

The CH 24 is available in both Monopoint and Dual Monopoint configurations to suit varying aircraft requirements. The Monopoint version provides a single, high-accuracy altitude signal—ideal for light aircraft or systems with simpler avionics layouts.

In contrast, the Dual Monopoint model includes two independent transmission channels within a single compact unit, offering full redundancy without requiring multiple separate units. This design reduces installation complexity while meeting the reliability demands of advanced flight decks.

High Accuracy and Reliability

Precision is central to the CH 24’s performance. Utilizing advanced pressure sensing technology and temperature compensation algorithms, it delivers altitude measurements with minimal error—typically within ±10 feet under standard conditions.

This high level of accuracy supports safe vertical separation between aircraft, enhances autopilot performance, and improves the reliability of terrain and traffic alerting systems like TAWS and TCAS.

Compact and Lightweight Construction

Designed with space and weight efficiency in mind, the CH 24 features a compact footprint and lightweight housing. This makes it ideal for installation in aircraft where avionics bay space is limited or weight savings are crucial—such as helicopters, UAVs, and small fixed-wing aircraft.

Despite its small size, the unit maintains robust internal shielding and structural integrity, ensuring long-term performance in vibration-prone environments.

TSO-C10b Certification

The CH 24 is certified under Technical Standard Order (TSO) C10b, a regulatory standard established by aviation authorities such as the FAA. This certification confirms that the device meets rigorous requirements for accuracy, environmental resilience, electromagnetic compatibility, and operational reliability.

TSO approval allows the CH 24 to be installed in certified aircraft without requiring supplemental type certification, streamlining the integration process and reducing time-to-service for operators and maintenance teams.

Durable, Environmentally Resilient Design

Housed in a ruggedized enclosure, the CH 24 is built to withstand extreme temperatures, humidity, shock, and vibration commonly encountered during flight. Sealed connectors and conformal-coated circuitry protect against moisture and corrosion, ensuring consistent performance in both tropical and arctic conditions.

The durable design extends service life and reduces maintenance frequency, contributing to lower lifecycle costs and higher aircraft availability.

Design and Integration

The CH 24 combines sleek industrial design with cutting-edge electronics to deliver a high-precision altimeter transmitter that fits seamlessly into modern avionics suites. Its compact form factor allows for flexible mounting options, including panel, rack, or remote installations.

The internal architecture leverages solid-state sensors and digital signal processing to minimize drift and improve response time. The cockpit interface—whether displayed directly or integrated via EFIS or PFD systems—provides pilots with real-time, easy-to-interpret altitude data, supporting quick decision-making and reducing pilot workload.

Note: Proper installation and periodic calibration are essential to maintain the CH 24’s accuracy and regulatory compliance. Always follow the manufacturer’s guidelines and consult certified avionics technicians during integration or maintenance. Using non-certified components or skipping scheduled checks may compromise system performance and airworthiness.

Commercial Value and Multiple Scenarios of CH 24 Altimeter Transmitters

The CH 24 altimeter transmitter series has established itself as a trusted solution across the aviation industry, delivering precise altitude data with proven reliability. Available in both Monopoint and Dual configurations, these transmitters serve a wide range of aircraft types—from small private planes to large commercial fleets—ensuring accurate barometric pressure readings critical for flight safety and operational efficiency.

With its TSO (Technical Standard Order) certification, the CH 24 meets stringent FAA requirements, reinforcing its credibility and widespread adoption. Its compact design, ease of integration, and compatibility with legacy and modern avionics systems make it a go-to choice for OEM installations, retrofits, and fleet upgrades.

Multiple Scenarios

The versatility of the CH 24 enables deployment across diverse aviation environments, each with unique performance and integration demands. Below are key applications where the CH 24 excels:

• General Aviation: Widely used in small private and recreational aircraft, the Monopoint model provides reliable altimetry without the complexity or cost of advanced systems. Ideal for VFR (Visual Flight Rules) operations where simplicity and accuracy are paramount.
• Corporate Jets: The CH 24 is a preferred altimeter transmitter in popular business jet series such as the Cessna Citation. Its compact footprint and high accuracy make it well-suited for space-constrained instrument bays while supporting IFR (Instrument Flight Rules) operations.
• Commercial Airlines: While many modern fleets are transitioning to digital glass cockpits, numerous regional and legacy aircraft continue to rely on the CH 24. Its long-standing reputation for durability and precision ensures continued use during phased upgrades and maintenance cycles.
• Heli-AVN Applications: Certain helicopter platforms integrate the Dual-output CH 24 to support redundant avionics systems. This configuration enhances safety in low-altitude and offshore operations where reliable altitude data is crucial.
• Retrofit & Modernization Projects: Aircraft undergoing avionics upgrades often replace obsolete altimeter transmitters with the CH 24 due to its drop-in compatibility, minimal wiring changes, and compliance with current airworthiness standards.

Key Insight: The CH 24 bridges the gap between legacy analog systems and next-generation digital avionics, making it a strategic component in both new installations and life-extension programs.

Commercial Value and Market Demand

The CH 24 remains a cost-effective yet high-performance solution in the altimeter transmitter market. Despite advancements in digital technology, its enduring presence underscores a strong value proposition across multiple customer segments.

• Cost Efficiency: Compared to full digital replacements, the CH 24 offers significant savings in procurement and installation, especially in retrofit scenarios where full system overhauls are not feasible.
• Global Compatibility: Designed to interface with a broad range of autopilots, transponders, and flight data systems, the CH 24 supports seamless integration across different avionics architectures.
• TSO-C10b Certification: Compliance with FAA TSO standards ensures regulatory acceptance and instills confidence among operators, MROs, and OEMs—boosting demand in certified commercial and corporate fleets.
• Support for Legacy Fleets: As aging aircraft remain in service, especially in cargo, training, and regional operations, the availability of reliable, certified components like the CH 24 is critical for maintaining airworthiness.
• Preference in Corporate Aviation: Owners of Citation and similar business jets value the CH 24’s proven track record, ease of maintenance, and consistent performance—factors that reduce downtime and operating costs.

Market Trend: Demand remains steady in the pre-owned aircraft market, where affordability and reliability are prioritized over cutting-edge features.

Strategic Recommendation: For operators balancing performance and budget, the CH 24 offers an optimal middle ground. Its combination of certification, durability, and backward compatibility makes it a smart investment for both short-term replacements and long-term fleet sustainability. When advising customers, emphasize total cost of ownership, service availability, and reduced risk through proven technology.

Additional Considerations

• Long-Term Support: Manufacturers continue to support the CH 24 with spare parts and technical documentation, ensuring sustainability for decades-old installations.
• Environmental Resilience: Engineered to perform reliably under extreme temperatures, vibration, and humidity—common challenges in aviation environments.
• Serviceability: Modular design allows for easy calibration and field repairs, reducing turnaround time during maintenance checks.
• Upgrade Path: Serves as an interim solution while operators plan for full EFIS or ADS-B compliance upgrades.
• Global Acceptance: Approved for use in North America, Europe, Asia, and Latin America, facilitating international operations and resale value.

How to Choose the CH 24 Altitude Transmitter for Aircraft

Selecting the right altitude transmitter is a critical decision for aircraft performance, regulatory compliance, and flight safety. The CH 24 Superpoint Altitude Transmitter has long been a trusted solution in general aviation, particularly for Cessna and Citation aircraft. This guide provides a comprehensive breakdown of the key factors to consider when choosing the appropriate CH 24 model for your aircraft, ensuring optimal integration, reliability, and value.

Important Note: The CH 24 is a legacy analog altitude transmitter. While still reliable and widely used, ensure compatibility with your aircraft’s avionics suite and verify whether modern digital alternatives (e.g., ARINC 429 output models) are required for your operational environment or future upgrades.

Key Considerations When Choosing a CH 24 Model

• Aircraft Type and Model Compatibility

  The CH 24 is engineered specifically for select Cessna single- and multi-engine aircraft and Citation jet models. It ensures precise altitude signal transmission to autopilot systems, altimeters, and transponders. Before purchasing, confirm compatibility with your specific aircraft’s make, model, and avionics configuration. Installation in non-certified or incompatible aircraft may lead to inaccurate readings or regulatory non-compliance.

• Channel Configuration: Monopoint vs. Dual Monopoint

  Buyers must decide between the Monopoint and Dual Monopoint versions based on operational needs:

  • Monopoint CH 24: Ideal for single-channel systems in general aviation aircraft where redundancy is not mandated. Offers a cost-effective solution for non-commercial or VFR operations.
  • Dual Monopoint CH 24: Designed for enhanced reliability, transmitting altitude data on two independent channels. Essential for commercial fleets, IFR operations, and critical flight systems requiring redundancy to meet safety and regulatory standards.
• TSO Certification: A Requirement for Compliance

  Always verify that the CH 24 unit you are purchasing is TSO-C92a certified. This certification, issued by the FAA, confirms that the device meets minimum performance, environmental, and safety standards for use in U.S. civil aircraft. Non-TSO units may be available at lower prices but are not legal for use in certified aircraft operations. For Part 91, 121, or 135 operators, TSO certification is mandatory.

• Installation and Commissioning Ease

  The CH 24 is known for its straightforward installation process, especially when replacing legacy Superpoint units. Its compact design and standardized mounting reduce labor time and complexity. Most certified avionics technicians can install and calibrate the unit efficiently, minimizing aircraft downtime. However, proper calibration using a precision altimeter tester is required post-installation to ensure accuracy.

• Cost and Long-Term Value

  As a mature product in the market, the CH 24 offers excellent value as a reliable, budget-friendly alternative to newer digital transmitters. While digital units offer advanced features like ARINC output and self-diagnostics, the CH 24 delivers consistent analog performance at a lower acquisition cost. When factoring in ease of installation, proven reliability, and wide support among maintenance providers, the total cost of ownership remains highly competitive—especially for operators maintaining older airframes.

Expert Tip: When upgrading or replacing a CH 24, consult your avionics technician to evaluate whether a transition to a digital altitude encoder (e.g., with ARINC 429 output) might better support modern ADS-B Out requirements and glass cockpit integration, even if the CH 24 remains compatible.

Final Recommendations

• Always source CH 24 units from authorized distributors or certified repair stations to ensure authenticity and TSO compliance.
• Check for service bulletins or obsolescence notices—some CH 24 variants may be nearing end-of-life.
• Document the unit’s part number, serial number, and TSO certification for maintenance and logbook entries.
• Consider spare unit inventory for fleet operators to minimize downtime during failures.
• Pair the CH 24 with regular pitot-static system checks to maintain overall altimetry accuracy.

In summary, the CH 24 remains a dependable and cost-effective choice for compatible Cessna and Citation aircraft. By carefully evaluating your aircraft model, operational requirements, certification needs, and long-term maintenance strategy, you can confidently select the right CH 24 configuration to ensure safe, compliant, and efficient flight operations.

Frequently Asked Questions About the CH 24 Altimeter System

The CH 24 is specifically engineered for optimal performance in Cessna and Citation series aircraft—two of the most widely operated general aviation and business jet platforms in the world. These aircraft benefit significantly from the CH 24’s precision altitude sensing, mechanical durability, and compatibility with existing pitot-static systems.

• Cessna Models: Includes popular single and twin-engine aircraft such as the Cessna 172, 182, 206, and the Cessna Caravan series, where reliable analog instrumentation remains a priority.
• Citation Jets: Applies to early- and mid-generation Citation models (e.g., Citation I, II, V, and Ultra) that require proven, FAA-certified components during maintenance or upgrades.
• Operator Advantages: Fleet operators and flight schools favor the CH 24 due to its long service life, minimal maintenance requirements, and consistent performance in diverse operational environments.

By focusing on these platforms, the CH 24 delivers tailored accuracy and reliability that aligns with the design standards and operational demands of these trusted aircraft families.

Technical Standard Order (TSO) certification is a formal approval issued by the Federal Aviation Administration (FAA) that establishes minimum performance standards for critical aviation equipment. A TSO-certified device, like the CH 24 altimeter, has undergone rigorous testing to ensure it meets strict requirements for accuracy, environmental resilience, and operational safety.

• Regulatory Compliance: TSO approval means the CH 24 can be legally installed in U.S.-registered aircraft and is recognized by aviation authorities worldwide, including EASA and Transport Canada.
• Safety Assurance: Certification confirms the unit performs reliably under extreme conditions—such as temperature fluctuations, vibration, and rapid pressure changes—common in flight operations.
• Installation Eligibility: Only TSO-certified instruments qualify for use in commercial, corporate, and air carrier operations where regulatory oversight is mandatory.
• Insurance & Maintenance: Using non-TSO equipment may void insurance coverage or complicate maintenance logs and airworthiness inspections.

In short, TSO certification isn't just a formality—it's a critical benchmark that ensures the CH 24 can be trusted in both routine and emergency flight scenarios.

The Dual Monopoint configuration in the CH 24 altimeter system is a key feature designed to enhance data integrity and system redundancy. It enables the simultaneous transmission of altitude information over two independent signal channels, ensuring continuous and accurate data flow to multiple avionics systems.

• Redundant Data Path: If one channel fails due to wiring issues or component malfunction, the second channel maintains critical altitude input to systems like transponders, autopilots, and traffic alert systems.
• Flight Safety Enhancement: Continuous data availability supports compliance with modern airspace requirements, including RVSM (Reduced Vertical Separation Minimum) and ADS-B Out operations.
• Ideal for Critical Missions: Particularly valuable in commercial, emergency medical, and cargo operations where uninterrupted instrument data is essential for situational awareness and regulatory compliance.
• Seamless Integration: The Dual Monopoint design allows the CH 24 to interface smoothly with legacy and modern avionics suites without requiring additional converters or signal boosters.

This dual-channel architecture makes the CH 24 not only reliable but also future-ready for integration into complex cockpit environments.

Retrofitting and avionics upgrade programs frequently select the CH 24 due to its exceptional balance of proven reliability, straightforward installation, and cost-effective performance. Unlike newer digital or software-dependent altimeters, the CH 24 offers a robust mechanical-electrical design that avoids the complexity and potential failure points of fully digital systems.

• Plug-and-Play Compatibility: Designed as a direct replacement for older analog altimeters, minimizing modifications to existing static lines, mounting brackets, and electrical connections.
• Lower Installation Cost: Reduces labor time and engineering oversight compared to integrating advanced digital units that require software calibration or interface modules.
• Proven Track Record: Widely used in both civilian and military applications, the CH 24 has demonstrated decades of dependable service in demanding environments.
• Support for Legacy Fleets: Ideal for operators maintaining older aircraft where full glass-cockpit upgrades are not economically viable, but safety and compliance remain top priorities.

For maintenance teams and fleet managers, the CH 24 represents a smart, sustainable choice—offering modern accuracy and certification without the steep learning curve or high cost of next-generation systems.