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K24 Flow Meter: Digital LCD Fuel and Urea Fluid Volumetric Monitors
Quick Answer: The K24 flow meter is a positive displacement oval gear meter with a digital LCD totalizer for diesel, light fuel oil, and urea fluid such as AdBlue. It provides local volume readings plus pulse or 4-20 mA signals for remote monitoring. Silver Automation Instruments supplies this meter for generator fuel monitoring, engine test benches, marine fuel transfer, and urea dosing skids.
What the K24 Flow Meter Is
The K24 is a volumetric flow meter. It uses oval gear rotors inside a measuring chamber. Each rotor turn moves a fixed volume of fluid. This gives a direct volume reading without a straight run of pipe. Most engineers choose it for low flow rates because positive displacement meters keep accuracy at idle or pilot flow. A turbine meter may undercount at 0.5 L/h. The K24 will still measure that flow.
Silver Automation Instruments offers the K24 in several sizes. Common connection sizes are DN4, DN6, DN10, DN15, and DN20. Standard thread types are BSPP or NPT. A DN6 meter often uses a G1/4 thread. A DN15 meter often uses a G1/2 thread. Typical accuracy is ±0.5 percent of reading. Repeatability is around ±0.2 percent. The standard body is aluminum alloy. For urea and corrosive fluids, we supply a 316 stainless steel body with PPS or stainless steel rotors.
Digital LCD Display and Signal Output
The local display is a digital LCD with six digits. It shows cumulative total, resettable batch total, and flow rate. This is useful on a diesel generator skid where an operator wants a direct reading without opening a PLC panel. The display can run on a 3.6 V lithium battery or on 24 VDC. Battery power suits remote sites in Indonesia or Africa where panel power is not nearby. The battery version keeps the totalizer active for 3 to 5 years in typical service.
For remote monitoring the K24 has pulse output. The pulse value depends on the meter size. A common configuration is 0.1 L per pulse. The meter also supports 4-20 mA analog output for PLC and SCADA integration. If your system uses a higher level controller, ask for 4-20 mA HART output. In some installations, a PT100 temperature sensor is installed on the same line to correct for temperature changes. That matters for diesel because volume changes by roughly 0.1 percent per degree Celsius.
Fluid Compatibility for Fuel and Urea
The K24 handles diesel, light fuel oil, kerosene, gasoline, and urea solution. Diesel viscosity is normally between 2 and 5 cP. Urea solution is close to 1.3 cP at 20 degrees Celsius. The K24 works with viscosities from 0.5 to 1000 cP. AdBlue urea solution has a conductivity around 1900 µS/cm at 25 degrees Celsius. That does not affect the K24 because the meter measures volume mechanically.
Here is the thing. Urea fluid is not hard to meter if you choose the right materials. For diesel and fuel oil, the standard aluminum body and FKM seals work well. For urea fluid, choose a different material set. Urea is water based and can crystallize when it dries. Avoid brass and copper. The K24 urea version uses a 316 stainless steel housing, PPS rotors, and EPDM seals. After each batch, flush the meter with demineralized water. Do not leave urea solution inside the meter overnight in hot climates. Crystals can lock the rotor within one week.
Applications Where the K24 Works Well
Generator fuel consumption monitoring is the largest use. A mining contractor in Indonesia installed K24 meters on diesel generator sets. They needed a local totalizer plus
Engine test bench builders in Australia use the K24 to measure diesel and gasoline in engine development. They connect the pulse output to a data logger. Because the meter is positive displacement, the test data stays stable even during low load points.
Urea suppliers in Vietnam put the K24 urea version on AdBlue transfer skids. They fill IBC tanks and need a repeatable batch total. The digital LCD lets workers stop the pump at exact volume. A generator rental company in Nigeria uses the K24 on mobile diesel generators for telecom towers. The same meter also works on small marine transfer lines for day tanks in Latin America.
Key Specs to Check Before You Quote
Fluid type matters first. Diesel and light fuel oil allow standard aluminum body. Urea or corrosive fluids require stainless steel and EPDM. Flow range matters next. The K24 is not a bulk loading meter for 500 L/min. It fits small to medium flow lines. A DN15 meter may cover 0.3 to 15 L/min under normal conditions. The minimum flow rate should be above the rotor startup point. Do not oversize the meter. If your normal flow is close to the minimum, the rotor may not turn and the meter will undercount.
Check pressure and temperature. Standard pressure is 20 bar. Optional 40 bar is possible. Standard temperature is -20 to 80 degrees Celsius. For urea keep temperature below 40 degrees Celsius to avoid crystallization. Confirm your power supply. The battery version has no external wiring. The 24 VDC version supports pulse and 4-20 mA output. If you need hazardous area certification, ask for ATEX Zone 1 or Zone 2 options.
FAQ
Q: Can the K24 measure AdBlue and diesel with the same meter body?
A: No. Standard diesel meters use aluminum and FKM. Urea fluid requires a stainless steel body, PPS rotors, and EPDM seals. Use two separate meters if you handle both fluids.
Q: What is the typical accuracy of the K24 volumetric monitor?
A: Accuracy is ±0.5 percent of reading for most sizes. Repeatability is around ±0.2 percent. This applies within the specified flow range and viscosity.
Q: Does the digital LCD display work in remote locations without panel power?
A: Yes. The battery powered version runs the LCD and stores the totalizer. For pulse or 4-20 mA output, you need the 24 VDC external power version.
Q: Which pipe size should I choose for a generator fuel line?
A: Most generator sets up to 500 kW use a DN6 or DN10 meter. Larger sets or day tank transfer may use DN15. Send us your flow range in L/h and pipe size. We will check the rotor speed and recommend a size.
Q: How do I prevent urea crystals from blocking the K24 meter?
A: Flush the meter with demineralized water after each use. Do not leave urea solution inside the meter overnight in hot climates. The 316 stainless steel and EPDM version tolerates the fluid but not dry crystals.
How to Get a Quote
Tell us your fluid type, pressure in bar, temperature in degrees Celsius, pipe size in DN, and flow range in L/h or kg/h. Also mention if you need pulse output, 4-20 mA, or ATEX certification. Our engineers will select the K24 body, rotor, and seal package for your application.
Contact Silver Automation Instruments by phone at +86-135-1213-1526. You can also reach us on WhatsApp at 86-135-12131526 or WeChat at +86 13512131526. Product details are available at flow-meter.com.au.