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This item is available for pre-order.
Please CONTACT US with any lead time requirements.
A four-channel lambda controller that drives Bosch's own LSU-IC to read up to four wideband oxygen sensors at once, delivering lab-grade air/fuel ratio data over CAN or analog in a box small enough to mount anywhere on the car, the bench, or the test cell.
A compact four-channel controller built around Bosch's own lambda IC.
The LT4 supplies controlled pumping current to up to four Bosch LSU 4.2, LSU 4.9, or Mini-LSU 4.9 wideband sensors at once, and turns each one's raw signal into a usable lambda value. Inside each LSU sensor is a Nernst cell and a pump cell. The controller holds the Nernst cell at a fixed reference lambda of 1.013 regardless of what's actually in the exhaust, by driving a current through the pump cell to compensate. That pump current is directly proportional to the real oxygen content of the gas, so measuring it is what gives you an accurate lambda reading across the sensor's full range, not just at stoichiometric.
Every channel gets internal heater control with voltage compensation, so sensor temperature stays correct as supply voltage varies. Lambda value, sensor temperature, and diagnostics are all available over CAN, and the analog outputs can be configured freely if your ECU, dash, or data system reads voltage instead.
Drives up to four LSU 4.2, LSU 4.9, or Mini-LSU 4.9 sensors simultaneously, each with its own heater control and pump current loop.
Lambda, sensor temperature, and diagnostics stream over CAN at 500 kbaud or 1 Mbaud, with four freely configurable 0 to 5 V analog outputs alongside it.
Signal sampling and CAN refresh both run at 100 Hz, with a signal resolution of 0.00025 lambda per channel.
A 54 x 59 x 13 mm (2.1 x 2.3 x 0.5 in) box, 100% humidity sealed, mounted with Velcro rather than hard points.
The connector is keyed against incorrect pinning, and the unit includes built-in heater voltage compensation across the supply range.
Ships configured with Bosch's Modas Sport software, included with the unit, for setup and calibration.
The LT4 was built to a motorsport specification, but the same combination of a lab-grade Bosch lambda IC in a compact, sealed, vibration-rated package makes it a useful precision air/fuel ratio instrument anywhere a business needs accurate wideband data outside of a passenger-car emissions system. We've supplied this unit to commercial and industrial customers as well as race teams, across industries including oil and gas field equipment, industrial gearbox and drivetrain test benches, heavy-duty and hybrid truck powertrain development, and agricultural and construction equipment engine development.
If you're evaluating the LT4 for an industrial, off-highway, or R&D application outside motorsport, our team can help you confirm it fits your combustion research, engine development, or test cell setup.
| Application range | Lambda 0.75 to 10.12 |
| Compatible sensors | LSU 4.2, LSU 4.9, Mini-LSU 4.9 |
| Channels | 4 |
| Heater control | Internal, per channel |
| Weight (with wire) | 3.5 oz (98 g) |
| Size w/o wire (w x l x h) | 2.13 x 2.32 x 0.51 in (54 x 59 x 13 mm) |
| Sealing | 100% humidity |
| Mounting | Velcro |
| Operating/storage temp | -4 to 185°F (-20 to 85°C) |
| Power supply | 10 to 14 V |
| Max power supply (1 min) | 26 V |
| Thermal dissipation | 3 W at 14 V |
| Current draw | 5 A running, 26 A while heating up |
| CAN baud rate | 500 kbaud or 1 Mbaud |
| Analog outputs | 4 x 0 to 5 V, freely configurable |
| Signal resolution | 0.00025 lambda |
| Sampling / CAN refresh rate | 100 Hz |
| Communication link | K-Line / CAN |
| Connector | AS 6-14-35PN |
| Connector loom | AS 1-14-35SN / F02U.000.365-01 |
| Sleeve | Viton |
| Wire size | 26 AWG |
| Wire length | 7.9 in (20 cm) |
Bosch recommends a maximum cable length of 1.5 m (59 in) between each sensor and the LT4 to avoid signal errors.
The LT4 supplies and reads any combination of these three LSU sensor types across its four channels.
| Sensor | Notes |
|---|---|
| LSU 4.9 | The standard, most widely used LSU sensor across current builds |
| Mini-LSU 4.9 | Smaller M16 x 1.5 thread and lighter Inconel housing for weight- and space-critical installs. Not stocked online, contact us to special order |
| LSU 4.2 | Previous-generation sensor, still supported by the LT4 |
The LT4 is a different ecosystem from the newer LSU ADV sensor, which requires the LT4 ADV controller instead.
Up to four, in any combination of LSU 4.2, LSU 4.9, or Mini-LSU 4.9 sensors, each on its own independent channel.
Yes. While it's built to a motorsport specification, the LT4 is a precision wideband lambda instrument that's also used in commercial and industrial settings such as combustion research, engine development, and test cell work, across industries like oil and gas equipment, industrial drivetrain testing, heavy-duty and hybrid truck powertrain development, and agricultural and construction equipment.
Both. Lambda, sensor temperature, and diagnostics are available over CAN at 500 kbaud or 1 Mbaud, and the unit also provides four freely configurable 0 to 5 V analog outputs.
Bosch's Modas Sport software, which is included with the unit, handles configuration and calibration.
No. The LSU ADV is a separate sensor ecosystem that requires the Lambdatronic LT4 ADV controller instead of the standard LT4.
Currently, UPS is our preferred shipping carrier for both domestic and international orders, however we will ship via FedEx if required. At checkout, you may select your preferred service type from UPS and benefit from our discounted shipping rates. Orders received before 2:30PM EST are able to be shipped the same day, pending the items ordered are in stock at our location. If an order is placed after 12PM EST and is urgent required expedited shipping, please contact us at (386) 333-9543, and we will do everything we can to process your request.
The current ground transit days from our facility as of 05SEP2024 are listed below. The transit times are subject to change at any given time via UPS/FedEx. Please visit their website for the most accurate information.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
You may return most new, unopened items within 7 days of delivery for a full refund (less the cost of shipping). Special order items will be subject to a restocking fee, so please contact us before sending your item. Your refund will process within one week of Creative Motorsport Solutions receiving your item. Please note the time it takes your bank to process your refund may take up to 5 to 10 business days.
We diligently try our best to keep the most popular items in stock. However, certain items may have extended lead times as items have to get shipped from their respected manufacturer's warehouses to us first; and then to you. If the items are in stock, the average added transit times are:
AvioRace: 1-3 days
Bosch: 3-6 days
Motec: 1-3 days
TireWatch: 7-10 Days
Texense/XAP: Please contact us for more information.
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