Further information can be obtained from VDO Web site. My reading is that the gauge can be used in 12 volt and 24 volt. About the Product.
eBay
85MM Diesel Engine Tachometer 3000/4000/6000/8000 RPM Gauge REV Counter with Digital Hourmeter 7 Color Backlight 12V 24V
Aliexpress UK
(Dissel Engine Tach Adapter RPM Signal Sensor For Vehicle Truck Boat Yacht ATV. 4)Disconnect Switch Cable, the LED will still stay Green and calculate the detected pulse from engine. For example, if the input frequency is 100Hz @1000RPM, the sensor will convert the signal and then output 66.6Hz @1000RPM.
eBay
RPM Gauge 8000rpm 6000rpm 3K-8K 85MM Diesel Engine Tachometer REV Counter with LCD Digital Hourmeter 7Colors Backlight 12V/24V
Aliexpress UK
For Diesel Motor Engine(The compatibility just for reference. Type:Tacho Gauge. Made of quality materials and practical. Number of Pieces: 1. Part Number://. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. ).
eBay
DT-2234C+ Digital Photo Tachometer Digital Engine Tachometer Digital Speedometer Digital Laser Photo Tachometer Non Contact Tach
Aliexpress UK
Signal duty factor: 47±5%. Tooth module: 2~6. Inductance distance: less than 1mm.
eBay
Winter Diesel Fuel Additive Injector Cleaner Diesel Saver Engine Carbon Deposit Save Diesel Increase Power Diesel Oil Additive
Aliexpress UK
Display range: 0–6000 rpm (on the dashboard). Internal diesel gauge. Suitable:For diesel engine. -Bright white LED lighting for night driving. Material: plastic. -The watch with black front panel and clear lens.
eBay
60ml Diesel Fuel Additive Injector Cleaner Diesel Saver Engine Carbon Deposit Save Diesel Increase Power Diesel Oil Additive
Aliexpress UK
(4)Disconnect Switch Cable, the LED will still stay Green and calculate the detected pulse from engine. For example, if the input frequency is 100Hz @1000RPM, the sensor will convert the signal and then output 66.6Hz @1000RPM.
eBay
Winter Diesel Fuel Additive Injector Cleaner Diesel Saver Engine Carbon Deposit Save Diesel Increase Power Diesel Oil Additive
Aliexpress UK
(4)Disconnect Switch Cable, the LED will still stay Green and calculate the detected pulse from engine. For example, if the input frequency is 100Hz @1000RPM, the sensor will convert the signal and then output 66.6Hz @1000RPM.
eBay
Alligator Clip Inductive Digital Hour Tachometer with Clock RPM Counter Inductive Hour Meter Small Engine Tachometer
Aliexpress UK
(4)Disconnect Switch Cable, the LED will still stay Green and calculate the detected pulse from engine. For example, if the input frequency is 100Hz @1000RPM, the sensor will convert the signal and then output 66.6Hz @1000RPM.
eBay
Carbon Additive Removal Engine Cleaner Power Enhancement Engine Diesel Fuel Oil Diesel Car Special Accessories Fuel Treatment
Aliexpress UK