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RGB Waterless Diffuser 2451
This rgb waterless diffuser 2451 runs an anodised alloy shell, Touch panel and RGB light. Cold nano-atomization breaks pure oil into 1-3 micron dry mist, so there is no water, no heat, no wet residue and no smoke. One 20 ml / 0.68 fl oz glass bottle covers 187.5 m³ / 6 621 ft³ at 0.2-0.74 ml/h across three levels. Runs at ≤36 dB, 3 W, DC 5V 1A Type-C. Ex-works pricing is $11.24 per unit at the 100-999 pcs tier, down to $10.22 at 5 000 pcs; a sample unit is $13.00. Samples ship from 1 pc and wholesale runs in cartons of 40 sets, wholesale direct from our China factory.
Floor area by ceiling height
3.75 m / 12.3 ft50 m² 538 ft² 187.5 m³ ÷ ceiling height
Scent is dosed by volume, so the fixed figure is 187.5 m³. Floor area is that volume divided by your ceiling height - double the height and the area halves. Open-plan rooms, atriums and stairwells count as one connected volume. Spaces with heavy fresh-air exchange or doors held open need de-rating; air-change data is confirmed per project, never estimated.
Factory price / unit · Aluminium alloy shell
High head A / B / C +$0.32 · colour +$0 · all 8 colours +$0. Samples from 1 pc; wholesale in cartons of 40 sets. Volume tiers below.
Bulk tiers
Nozzle head
Flat headColour · +$0
BlackOrder quantity
120 pcs · 3 cartonsAdd 880 pcs to reach 1 000 pcs (25 cartons) at $10.47 per unit, $0.77 less on every piece.
Heads share one thread, so a spare head re-styles existing stock without a new SKU. The head surcharge is the same at every quantity.
Atomization levels
| Level | Spray / sleep | Oil use | Runtime |
|---|---|---|---|
| 1 | 10 s / 170 s | 0.2 ml/h | 70 h |
| 2 | 30 s / 150 s | 0.5 ml/h | 20 h |
| 3 | 90 s / 110 s | 0.74 ml/h | 7 h |
In every carton
4 default accessories
- White EPE foam protective lining
- Diffuser unit in PE bag
- Type-C cable, 1 m / 3.28 ft
- User manual x1
- Snap-lid retail box, 95 x 95 x 140 mm / 3.74 x 3.74 x 5.51 in
The nozzle ships fitted with an 20ml empty bottle. No AC adapter is included - the unit charges from any USB source.
Full specification
| Product size | 69 x 69 x 120 mm / 2.72 x 2.72 x 4.72 in |
|---|---|
| Body diameter | φ68 mm / φ2.68 in |
| Coverage | 187.5 m³ / 6 621 ft³ |
| Floor area guide | 78 m² / 841 ft² at 2.4 m · 69 m² / 747 ft² at 2.7 m · 50 m² / 538 ft² at 3.75 m · 42 m² / 448 ft² at 4.5 m (volume ÷ ceiling height) |
| Oil capacity | 20 ml / 0.68 fl oz fitted; accepts 5 / 10 / 15 ml, 18 mm screw thread |
| Oil consumption | 0.2-0.74 ml/h / 0.007-0.025 fl oz/h |
| Mist particle | 1-3 micron dry aerosol |
| Retail box | 95 x 95 x 140 mm / 3.74 x 3.74 x 5.51 in |
| Net weight | 420 g / 0.93 lb |
| Carton | 40 sets / 50 x 40 x 30 cm, gross 17 kg / 37.48 lb |
| Noise | ≤36 dB |
|---|---|
| Power | 3 W |
| Rated input | DC 5V 1A, Type-C |
| Battery | 2000 mAh lithium-ion |
| Runtime | 70 h / 20 h / 7 h (level 1 / 2 / 3) |
| Timer | 1H / 2H / 3H / always-on · display build: 1H / 2H / 3H / 6H |
| Control | Top touch keys |
| Materials | Aluminium alloy + PP structural parts + glass oil bottle |
| Colours | Black, silver, grey, blue, green, pink, gold, red (8 colourways, +$0) |
| Nozzle heads | Flat / high head A / B / C, interchangeable thread |
| Working temp. | 10 °C - 50 °C / 50 °F - 122 °F |
| Indicator | Emerald green - switch, timer, breathing |
| Protection | Pump stops beyond 45° tilt; resumes within ~1 s upright |
| Certification | CE, FCC, RoHS |
| MOQ | 1 pc sample · 40 pcs / 1 carton for wholesale tiers |
| Air pump service life | 2 000 h (model 370) |
| Warranty period | 1 year |
| Charging time | 3.5h |
One option to choose: the nozzle head
This page covers the Aluminium alloy shell only. Every unit on it shares the same 69 x 69 x 120 mm / 2.72 x 2.72 x 4.72 in body, the same 187.5 m³ / 6 621 ft³ output and the same 2000 mAh battery. Two things move the unit price: the order quantity, which sets the tier, and the nozzle head, which adds +$0.32 on top of it. Colour is free.
| Nozzle head | SKU | Surcharge | Unit price at 120 pcs |
|---|---|---|---|
| Flat head | WD-2451-AL-RGB-FLAT | +$0 | $11.24 |
| High head A | WD-2451-AL-RGB-HA | +$0.32 | $11.56 |
| High head B | WD-2451-AL-RGB-HB | +$0.32 | $11.56 |
| High head C | WD-2451-AL-RGB-HC | +$0.32 | $11.56 |
Volume tiers
| Order quantity | Cartons of 40 | Flat head | High head A | High head B | High head C |
|---|---|---|---|---|---|
| 1 - 1 pc | 1 pc, no carton | $13.00 | $13.32 | $13.32 | $13.32 |
| 2 - 99 pcs | 2 pcs, no carton | $11.67 | $11.99 | $11.99 | $11.99 |
| 100 - 999 pcs | 2 - 24 cartons | $11.24 | $11.56 | $11.56 | $11.56 |
| 1 000 - 4 999 pcs | 25 - 124 cartons | $10.47 | $10.79 | $10.79 | $10.79 |
| 5 000+ pcs | 125+ cartons | $10.22 | $10.54 | $10.54 | $10.54 |
Nozzle
High head +$0.32
Raises the mist outlet for a wider plume. Heads A / B / C cost the same and swap on the same thread, so spare heads can re-style existing stock instead of holding extra SKUs.
Colour
8 finishes +$0
Black, silver, grey, blue, green, pink, gold, red (8 colourways, +$0)
Ordering
1 pc sample
Wholesale ships in cartons of 40 sets; volume pricing starts at 100 pcs, ex-works.
Detail gallery














User manual
The 24xx manual covers key functions, the three atomization gears, timer cycling, memory behaviour, charging states and safe-use limits. Buyers reselling into retail may reprint it under their own brand as part of a private-label order.
Open the 24xx manual PDF (324 KB)Safe use extract
- Do not invert or tilt a filled unit - oil will drain into the pump and cause permanent damage.
- Operate between 10 °C and 50 °C / 50 °F and 122 °F.
- Switch the unit off before changing oil.
- For long storage, remove the nozzle and store it separately from the body.
- Do not modify or disassemble - this voids warranty.
Bottle change and level setup in 5 steps
Source: WD Aroma 24xx user manual. Total time about 2 minutes, no tools.
- Switch the unit off. Press and hold the power button for 2 seconds until every light is out. Never change oil while the pump is running.
- Release the bottle from the base. Push the bottle up from the bottom of the body to release the nozzle assembly, then unscrew the bottle from the nozzle.
- Fill and refit. Fill with neat essential oil, screw the bottle back onto the nozzle, then align the mark on the bottle holder with the mark on the body.
- Select the atomization level. Short-press the power key to cycle 10 s / 170 s, 30 s / 150 s and 90 s / 110 s. The chosen level is stored in memory.
- Set the timer. Press the timer key to cycle 1H, 2H, 3H and always-on. Display units offer 1H, 2H, 3H and 6H instead.
Certification
CE, FCC and RoHS apply to this platform. Certificate copies and the per-market document list are issued with your quotation. Additional market approvals are quoted separately.
No engraving charge
Logo engraving on your sample unit
Order one sample unit at the 1 pc tier price and we laser-engrave your logo on it at no extra charge, so you approve placement, depth and contrast on the actual shell before the production run. The engraving service is free; the sample unit itself is charged at the 1 pc price. Send vector artwork with Pantone references. Volume logo work across the order, printed sleeves and custom retail boxes are quoted separately.
Buyer questions
How much oil should I budget per month?
Budget from the level and the hours you actually run it, not from the bottle. A 20 ml / 0.68 fl oz bottle lasts about 70 h at level 1, 20 h at level 2 and 7 h at level 3. On an everyday 3-4 h cycle, one bottle covers roughly three weeks at level 1 or about a week at level 3, so most homes use 1-2 bottles a month per regularly scented room. The specification sheet carries a ±1x tolerance because viscosity varies by oil. To rotate scents, use the smaller 5 ml / 0.17 fl oz and 10 ml / 0.34 fl oz bottles instead of leaving one bottle half-used.
What is the real difference between the high heads A / B / C?
They are 3 cosmetic top profiles on one common thread, all at the same +$0.32. The venturi sits inside the head itself, but it is the same venturi in all three, so mist output, particle size and oil draw are identical. The high heads stand about 1 cm / 0.4 in taller than the flat nozzle, which keeps atomised oil from condensing where it is visible. Buy a spare head to re-style existing stock instead of opening a second SKU.
Why is coverage given in cubic metres, and how does that map to floor area?
Scent fills a room in three dimensions, so coverage is rated as a volume: 187.5 m³ / 6 621 ft³, not a floor area. The floor area it covers is that volume divided by the ceiling height, so the same unit scents a larger footprint in a low room and a smaller one in a tall room. At a 2.4 m / 8 ft ceiling it is about 78 m² / 841 ft², at 2.7 m / 9 ft about 69 m² / 747 ft², and at 3.75 m / 12.3 ft about 50 m² / 538 ft². Treat open-plan rooms, stairwells and mezzanines as one connected volume.
Which oil bottles fit, and can I use my own retail bottles?
An empty 20 ml / 0.68 fl oz glass bottle ships fitted to the nozzle. Below that it takes the standard 5 ml / 0.17 fl oz, 10 ml / 0.34 fl oz and 15 ml / 0.51 fl oz bottles. They all share the common 18 mm screw thread (18 mm neck diameter): unscrew the retail cap and screw the bottle straight onto the nozzle, no adapter needed, or decant into the fitted bottle. Thick carrier oils, resins and anything with wax will clog the venturi - stick to neat essential oil and oily synthetics.
How does the running cost compare with an ultrasonic diffuser?
An ultrasonic unit dilutes oil into water, so the scent throw per millilitre of oil is far lower and the tank needs cleaning. This platform sprays neat oil at 0.2-0.74 ml/h and puts no water into the room, which is why it can sit next to laptops and mirrors. The trade is oil cost: you spend less on labour and refills of water, more on oil per hour at level 3.
What happens if it gets knocked over?
Past 45 degrees the tilt sensor cuts the pump, and misting resumes within about 1 second once the unit is back upright. Stand it up promptly: if it is left upside down, oil can run back into the air pump and corrode it, so righting it within 3-5 minutes prevents backflow. The bottle threads onto the nozzle rather than sitting loose, so an ordinary knock does not empty oil onto the carpet. Damage caused by prolonged inversion or spilled oil is user damage and is not covered by the 1-year warranty.
Can I get this model with a digital display?
A display build exists on this platform at +$0. It replaces the always-on timer slot with a 6H position and shows battery state on the panel. It is not a picker option on this page - put "display" on your RFQ and we build that version.
Is the sample unit free, or just the engraving?
The engraving is free. The sample unit is not. You pay the 1 pc tier price for the diffuser itself ($13.00 on this model), and we laser-engrave your logo on it at no extra cost - there is no setup fee, no plate fee and no minimum for the engraving. That is the whole of what "free" covers here. Quoted separately: volume logo work across the production order, printed sleeves, custom retail boxes and any artwork redraw. Send vector files with Pantone references. Tooling or design fees, if any, are on request - we do not carry a standing number for them.
How is 187.5 m³ measured, and what do I buy if it is not enough?
It is the room’s cubic volume - length × width × ceiling height - not its floor area. Divide 187.5 m³ by your ceiling height for the footprint, as set out in the coverage question above. If your space is larger than that, do not run a portable unit on level 3 around the clock; step up to a mains-powered commercial unit that can be ducted into the HVAC system. Browse the commercial fragrance diffuser range for HVAC-tied installations.
What are the lead time, warranty and pump service life?
Small quantities ship from ready stock; production runs under 500 units take about 15 days and orders over 1 000 units about 30 days, confirmed on your quotation. The unit carries a 1-year warranty. This year we upgraded the whole platform from the 320 pump to the model 370 air pump - quieter, with higher airflow and finer atomisation - rated 2 000 hours on the specification sheet. Certification on file is CE, FCC and RoHS.
Request for quotation
Get your 2451 Aluminium alloy wholesale price
Tell us the nozzle head, colour split and quantity and we will come back with unit price, carton spec, lead time and the certificate list for your market. We manufacture every diffuser in our own China factory, so quotes come from the production line rather than a trading desk - and we engrave your logo on the sample unit at no extra charge.
Explore the full range
- Waterless essential oil diffusers - the whole 24xx platform in the 187.5 m³ class
- Portable diffusers - battery units for cars, desks and travel retail
- Nebulizing diffusers - 375 m³ to 750 m³ mid-range machines
- Commercial fragrance diffusers - A and M series up to 8 000 m³
- Wall-mounted scent diffusers - corridor and washroom installations
- Smart scent diffusers - Bluetooth, WiFi and app scheduling
- Metal diffusers - anodised aluminium bodies across the range
- Pure essential oils - matched to nebulizing hardware