Zeitronix Zt-4 Dual Wideband Air/Fuel ratio meter is a simple to use high quality, stand-alone system for carbureted and electronic fuel injection engines. Simplifies AFR tuning adjustments for carburetors. The new Zt-4 has the same high quality, high precision air fuel ratio readings as our signature Zt-2 wideband. The Zt-4 supports wideband air fuel ratio and lambda readings, adjustable simulated narrowband outputs and configurable linear wideband outputs for ease of use with engine management systems and 3rd party gauges. The new Zt-4's dimensions are only 3.3 by 2 by 1 inches. Includes the Zt-4 Wideband Air/Fuel Ratio Meter 10 ft high temperature, high quality, O2 Sensor Harness (2) 4.9 O2 Sensor (2) Signal Harness Instructions Data logging software available for download. Made in the USA. PC cable for logging and outputs setup is an option available for purchase. Installation instructions Zeitronix Data Logger Software
Optional Dual AFR ZR-4 Gauge Plugs and powers up directly from Zt-4 Gauge / Data port For best accuracy the ZR-4 Gauge reads digital AFR data from the Zt-4. Base diameter     2" 1/16 (52mm) Bezel diameter    2" 1/2   (62mm) Thickness           0.75"      (19mm) Digit height         0.2"       (5mm)
Configurable Wideband Output Match the Zt-4 Wideband outputs to a third party system, data logger or a 3rd party gauge. Volts  AFR

Very simple installation - connect two wires to +12V and ground and place two O2 sensors in the exhaust stream and you are ready to read AFR!  A simple LED indicator displays off, warm-up and running modes. Additional information is available for setting up the configurable linear wideband output with your particular engine management system.

Zt-4 Specs

• 0.1 AFR accuracy
• Operating voltage 10V to 18V
• Switching power supply for oxygen sensor heaters
• Precise sensor temperature control
• Reverse polarity protection
• Integrated self resettable fuse
• Positive lock connectors
• Protected inputs and outputs
• Flexible Plug and Play Sensor Harness with a small, easy to route through the fire wall, connector
• Optional logging serial cable available
• Easy to install plug and play kit
• Two Narrowband Outputs
• Two configurable Wideband Analog Outputs

Inputs/Outputs:

• 2  Bosch Wideband O2 sensor Inputs
• Simulated and adjustable switching point Narrowband Outputs to feed a stock ECU
• 2 Linear Wideband Outputs (configurable with a default setup of AFR = Volts * 2 + 9.6
• Serial data output to the Zeitronix ZR-4 AFR or DashDAQ displays
• Serial data output for real time datalogging (PC laptop and optional logging cable required)

Zeitronix Datalogging Software
The Zt-4 communicates with the PC Laptop via the serial port using optional serial cable. The Zeitronix Data Logger (ZDL) software records up to 9 hours of data per single file. Many different screen display options are available including plots, text and dashboard views and uses a black plot background for easy night tuning. Logging start, stop and pause are accessible from keyboard shortcuts. The ZDL software supports excel CSV and text data export.

Win98/NT/2000/ME/XP/Vista/Windows 7/8/10 compatible.
You do not need P4, P3 or even P2 laptop. We understand that you want to leave your new laptop at home and dedicate the old one to car tuning. We give you well optimized software. If your laptop is capable of running Win95 and up it is good enough for the Zeitronix logging software.

The digital gauge screen option could be used when purchasing the Zt-4 without a display.

Zeitronix Data Logging Software Download.

• ZR-4 Dual AFR Gauge
• DashDAQ Touch Screen Display
• nGauge Display

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