WJ-HP01

Overview

The Centi WJ-HP01 is a compact scent diffuser. It is a compact home and small-office scent diffuser sized for bedrooms, living rooms, treatment rooms and personal workspaces. The WJ-HP01 measures 220 × 220 × 320 mm, carries a 1500 ml refillable fragrance reservoir, covers up to 300 m² (3,200 ft²), and runs on an AC 100–240 V / 1.5 A DC adapter supply. Centi manufactures the WJ-HP01 at the Guangzhou factory and ships direct to hotels, offices, distributors and brand buyers under EXW USD pricing, with OEM/ODM finishes available on request.

• Covers up to Up to 300 m² (3,200 ft²) on a single 1500 ml refillable bottle, suitable for hotel rooms, corridors and mid-size commercial floors.
• Operates at < 38 dB @ 1 m measured at 1 m, suitable for guest-room and bedroom deployment without ambient noise disruption.
• Schedules up to five working modes (day-of-week, time window, frequency) via button control, supporting unattended 24/7 scent cycles.
• EXW USD pricing direct from Centi Guangzhou; OEM/ODM finishes, private label and bulk wholesale available for B2B buyers.

Specifications

Applications

The WJ-HP01 fits home bedroom, living room scent diffuser, small commercial, personal fragrance machine deployments. Common buyer profiles include independent hotel and resort procurement, scent-marketing agencies, multi-site retail chains, real-estate developers fitting show apartments, spa and clinic operators, and OEM/ODM distributors selling under their own brand. For HVAC-integrated installations Centi sales can introduce compatible duct adapters; for portable or battery-operated models the unit ships ready-to-use after the fragrance oil reservoir is filled.

Installation

Mounting or placement is specified in the per-model quick-start guide included in every shipment. Wall-mounted and HVAC units require the supplied bracket and a standard AC outlet; portable and tabletop units plug into a USB Type-C or DC adapter. Initial calibration happens through the on-device screen, button or companion app; daily operation is automatic once the schedule is set. The fragrance reservoir is removable for refill, and the atomizer head assembly can be replaced without tooling.

Operation

The diffuser accepts up to five custom working modes. Each mode sets the day-of-week pattern, the start and stop time window, and the on/off duty cycle. The on time is adjustable from 5 to 200 seconds and the off time from 20 to 600 seconds. Crossing over midnight requires two consecutive windows (for example 23:00 to 23:59 and 00:00 to 02:00). Factory-reset parameters restore the unit to 60 seconds on and 200 seconds off, Monday to Sunday 08:00 to 22:00. Bluetooth companion-app control mirrors the same scheduling surface and is bundled on models with Bluetooth hardware.

Maintenance

Clean the spray nozzle and atomizer core every 1 to 2 months during normal use. With the device powered off, use a cotton swab moistened with 95% alcohol to gently wipe the nozzle and the atomizer core; allow all parts to dry completely before reassembly. When changing fragrance oils, rinse the oil bottle with alcohol and let it air-dry before adding the new oil. For long-term storage, add 95% industrial alcohol to the empty bottle, run the device for 10 to 15 minutes, then power off and unplug to prevent electrostatic damage. Replacement atomizer cores ship in standard Centi packaging; coverage terms are confirmed in the quote document.

Frequently asked questions

How does the WJ-HP01 scent diffuser work, and how is it different from ultrasonic or heat-based diffusers?

The WJ-HP01 uses cold-air diffusion: a precisely metered airflow feeds fragrance oil through a calibrated nozzle without heating the oil or adding water. Cold-air diffusion preserves the original fragrance chemistry through long duty cycles and produces a smaller droplet size than ultrasonic or reed diffusers, so the scent stays airborne long enough to be carried by HVAC airflow or natural room convection. Cold-air diffusion is the technology used in professional scent-marketing installations because it keeps the scent profile consistent across the entire diffusion cycle, while heat-based diffusers can alter top notes over long duty cycles and ultrasonic units add moisture to the air.

What room size does the WJ-HP01 cover, and how do I size it for my project?

The WJ-HP01 is rated for Up to 300 m² (3,200 ft²) of effective scent coverage from a single unit. Coverage is measured under typical commercial conditions with standard ceiling height (2.7 to 3.0 m) and moderate HVAC airflow. For open-plan spaces larger than the single-unit rating, multiple units with overlapping coverage fields deliver more even scent distribution than a single higher-output unit. Centi sales can return a recommended unit count per project floor plan on request and quote a multi-unit price.

Which fragrance oils can I use with the WJ-HP01?

The WJ-HP01 is engineered for synthetic and natural fragrance oils formulated for cold-air diffusion, with a recommended viscosity range suitable for the calibrated nozzle. Centi supplies its own fragrance oil line tested against the WJ-HP01 hardware, and third-party oils can be qualified through Centi's sample programme. The published consumption figures are based on a reference fragrance oil with density ≥ 0.95 g/ml; lighter or heavier oils will vary the consumption rate. Do not fill the bottle with water, alcohol, or essential oils not approved for diffuser use.

Can the WJ-HP01 be customised under OEM/ODM for private-label distribution?

Yes. Centi supports OEM/ODM on the WJ-HP01 for distributors, hotel chains and brand buyers. Available customisation points include cabinet finish (white, black, wood-grain, gold, silver, custom Pantone), silhouette decals, packaging artwork and user-manual localisation. MOQ and lead time are confirmed per finish and per artwork in the formal quote. Centi sales returns the full OEM checklist with the formal quote.

What does installation look like for the WJ-HP01, and is a technician required?

Wall-mounted and tabletop units install without a technician: mount the bracket, plug the AC or DC adapter into a standard outlet, fill the fragrance reservoir, and set the schedule through the on-device controls or the Centi companion app. HVAC-integrated models such as the EI / DI / LI series require a building-engineering review for duct tapping and airflow balancing; Installation documentation for the installing contractor is available on request with the quote. Portable and battery-operated models require no installation beyond charging and filling.

What warranty and after-sales support does the WJ-HP01 carry?

Warranty coverage and after-sales terms for the WJ-HP01 are confirmed in the formal quote document for each order. Consumables such as fragrance oil are excluded from coverage. Centi after-sales handles service requests against the original commercial invoice; replacement parts ship ex-warehouse Guangzhou with freight and import duties quoted per destination.

How does the WJ-HP01 compare to a passive reed diffuser or an ultrasonic humidifier?

Reed diffusers and ultrasonic humidifiers rely on passive evaporation or water-mediated atomisation, both of which add moisture and degrade the top notes of the fragrance oil over time. The WJ-HP01 cold-air diffuser keeps the oil chemistry intact and adds no moisture to the air. Coverage and consumption are also more predictable, which simplifies multi-site procurement for hotel and retail chains. Cold-air diffusers are also the technology specified by scent-marketing agencies because the scent profile stays consistent across the full duty cycle.

Sources and references

References and source documents

• Centi Guangzhou factory quality management and CE / CB / RoHS conformity documentation, available on request with NDA for confirmed purchase enquiries.
• Test-essential-oil specification sheet: reference fragrance oil, density ≥ 0.95 g/ml, published consumption data based on this benchmark.
• After-sales terms are confirmed in the quote document bundled with every Centi factory shipment (consumables excluded).
• Compliance with EU fragrance-allergen disclosure requirements under IFRA categories 4 (fine fragrance) and 11 (air freshener) where applicable to the deployed fragrance oil.
• Centi product-catalogue revision log (current edition 2026-09); specifications subject to change without notice.