White-Background AFR Stack Gauge with Bosch Wide-Band Lambda Sensor

AFR / Wideband Lambda Stack Air-Fuel Analyzer ST3404 with white background and Bosch LSU 4.9 lambda sensor

The AFR / Wideband Lambda Stack ST3404 air-fuel analyzer displays the air-fuel ratio (AFR) or Lambda value in real time, selectable by the user. Developed for racing and engine tuning applications, it combines a red digital display with a multicolored LED radial indicator on a white background, providing quick and accurate readings.
The system features adjustable calibration to optimize the display based on the type of fuel used. It also includes a memory for the maximum lean mixture value, a programmable alarm, a light sensor for automatic adjustment of display brightness, as well as 0-5 V analog and series outlets for connection to an engine control module (ECU), a data logger, or any other compatible system. A Pro-Control outlet also allows for the automatic control of other equipment based on the measured lambda value.
The gauge comes with a complete wiring harness for the electrics and a Bosch LSU 4.9 sensor.
Technical Specifications
Brand: Stack
Part Number: ST3404
Type: AFR/Wideband Lambda Air-Fuel Analyzer
Diameter: 52 mm
Background Color: White
Display:

• AFR or Lambda value (user-selectable)
• Red digital display
• Multicolored radial LED indicator
• Brightness automatically adjusted by light sensor

Features:

• User calibration based on fuel type
• Memory for maximum lean mixture value
• Programmable alarm
• 0–5 V analog outlet
• Serial data outlet
• Pro-Control outlet
• ECU and data logger compatible

Compatible fuels:

• Unleaded gasoline
• Methanol
• Ethanol
• LPG (Propane)
• CNG (Compressed Natural Gas)
• Compatible with nitrous oxide (in accordance with applicable regulations)

Included sensor: Bosch LSU 4.9
Specifications of the Bosch LSU 4.9 sensor

• Length: 84 mm
• Weight (excluding cable): 120 g
• Mounting wrench: 22 mm
• Tightening torque: 40 to 60 Nm
• Gas operating temperature: up to 930 °C
• Maximum gas temperature: less than 1,030 °C
• Maximum vibration resistance: 100 g

Not compatible with:

• Leaded gasoline
• 2-stroke engines

Includes:

• Stack ST3404 Air-Fuel Analyzer
• Electric wiring harness
• Bosch LSU 4.9 sensor

Key Features

• Selectable AFR or Lambda display
• High-visibility white background
• High-visibility digital display and multicolored LED
• Calibration based on the fuel used
• Memory for maximum lean mixture value
• Programmable alarm
• 0-5 V analog and serial outlets
• ECU and data logger compatible
• Bosch LSU 4.9 sensor included