Quick answer: Mingseal KPS2000 is a non-contact piezoelectric jet valve for reagent coating on CGM test strips. It jets from 0.5 nL at CPK > 1.33, holds volume accuracy within ±2%, and runs continuously at 1200 Hz. Because the nozzle never touches the strip, the enzyme is not damaged and no reagent is left stuck on the tip.
Product Overview
The KPS2000 is a high-speed, non-contact jet valve for low to ultra-high viscosity fluids — up to 500,000 mPa·s.
Three factory configurations cover biosensor chemistries: UV-curable, corrosion-resistant, and PUR. A modular design adds anaerobic and hot-melt capability without changing the mounting footprint.
Its relevance to CGM strips is not speed alone. It is that reagent leaves the valve as a free-flying droplet, so the two dominant loss mechanisms in coating — shear damage and nozzle wick-back — no longer exist.
One valve serves both pilot trials and high-cavity production, which matters where lines run mixed models rather than one product at a single speed.
The Problem: Reagent Coating Caps Strip Yield
On a CGM strip, the reagent layer is nanolitres thick but carries the enzyme, mediator and buffer that set sensitivity, linearity and shelf life.
Reagent is therefore the most expensive consumable per strip. Every wasted nanolitre is margin lost, and every uneven layer becomes a calibration failure downstream.
Southeast Asia is now building this capability locally. Malaysia's Penang cluster is Southeast Asia's largest medical device manufacturing base, and Dexcom has established a CGM production facility there. Vietnam, Thailand and Indonesia are expanding medtech output on the same curve.
The bottleneck in every one of these projects is the same: the coating step — not the robot or the gantry — becomes the yield limit.
The Cause: Three Error Sources in Contact Dispensing
1. Time-based metering. Time-pressure systems open a valve for a fixed duration. Delivered volume depends on viscosity, which shifts with temperature and batch. The error is structural, not a tuning issue.
2. Nozzle wick-back. The needle touches or hovers near the substrate. Reagent wets the tip and creeps back between cycles, so residue from shot N changes shot N+1.
3. Shear at the needle. Enzymes are fragile proteins. Mechanical shear degrades activity before the strip is even cured, and no downstream step recovers it.
Adjusting pressure or dwell time only relocates these errors. It cannot remove them.
The Solution: Non-Contact Piezoelectric Jetting
The KPS2000 replaces time-based metering with a positive displacement event. A piezoelectric actuator drives a striker against a seat, ejecting one droplet across a short air gap.
Because the fluid path never contacts the substrate, there is no wetting, no drip and no re-priming loss. Waste is confined to start-up and end-of-batch.
A striker guide seat is threaded directly into the fluid channel. This holds the striker coaxial with the nozzle and raises jetting force by 20% — the reason high-viscosity reagent jets cleanly.
Smooth trapezoidal waveform control keeps scatter rate below 0.5% with controlled bubble behaviour, and repeatability reaches 0.01 mm.
The valve forms dots down to 0.2 mm and can jet into 0.1 mm gaps, so reagent stays inside a defined electrode window.
Application Scenarios
CGM test strips and glucose biosensors. Reagent is jetted into the electrode window as nanolitre dots, forming a thin uniform enzyme layer without contact damage.
Precision electronics and PCB/FPC. Solder paste, conductive epoxy and underfill in tight keep-out zones.
Camera modules, VCM, micro speakers, micro vibration motors. Micro-volume bonding where overspray is unacceptable.
Medical devices with aggressive chemistries. The corrosion-resistant wetted path handles buffers and electrolytes that attack standard seals.
Why tropical conditions change the coating calculation
Southeast Asian plants typically run at 28–35 °C with 70–90% relative humidity, and reagent is often held chilled before use.
A chilled fluid warms as it travels to the nozzle, so viscosity drops mid-shift. Time-pressure valves translate that drift directly into volume drift.
The KPS2000 meters by displacement rather than by time, so viscosity change affects droplet formation far less than it affects open-valve duration. Its 10–50 °C operating window covers tropical ambient without auxiliary cooling.
A closed fluid path also limits moisture ingress, which matters where humidity attacks hygroscopic reagent components between batches.
How It Works
The reservoir feeds reagent into the fluid channel and nozzle chamber.
A piezoelectric stack expands on command and drives the striker downward.
The striker impacts the seat and ejects a single droplet at high velocity.
The droplet crosses a short air gap and lands without touching the nozzle.
The drive waveform shapes each pulse; continuous jetting reaches 1,200 Hz.
Nozzle sleeve replacement takes under one minute, with volume accuracy held within ±2%. Routine maintenance needs no ADJ recalibration, and process recovery is under two minutes.
How to Choose: Five Decisions
1. Match viscosity first. Below 200,000 mPa·s the standard configuration is sufficient. Above 350,000 mPa·s, specify the KPS2000 rather than the lower-force PJS models.
2. Confirm volume per shot. Below 1 nL, validate the 0.5 nL capability and required CPK with a fluid sample test before committing to a line design.
3. Size for your batch structure. High-cavity lines justify multiple valves. Multi-model, lower-volume lines usually run better with one valve and fast changeover, since parameter sets transfer between products.
4. Confirm chemistry compatibility. UV, PUR, anaerobic, hot-melt and corrosive fluids each need the matching module. Corrosive buffers require the corrosion-resistant wetted path.
5. Plan controller and service. Pair with a Mingseal KDC or DC series controller, and confirm spare-part and nozzle-sleeve availability with your regional distributor before commissioning.
What to send us for a recommendation
To return a specific configuration rather than a general datasheet, we need five inputs: fluid name and viscosity, target volume per shot, shots per strip and cycle time, substrate material, and required CPK.
