Ozone Technologies Ltd

Ozone Generators NZ

Name: Ozone Technologies Ltd
Address: 22B Turner Place, Onekawa, Napier, Hawke's Bay, 4110, NZ
Telephone: +64 6 8432881
Price range: $$$$

Industrial and commercial ozone generators — designed, built and serviced in New Zealand

Ozone Technologies Ltd manufactures a complete range of ozone generators in our Napier workshop — from compact 10 g/hr corona-discharge units suitable for laboratories, small breweries and aquaculture tanks, through to industrial-scale 5 kg/hr generators feeding municipal drinking-water plants and large bottled-water facilities. Every generator we sell is engineered to suit the application: corona-discharge, oxygen-fed for high concentration and efficiency, with stainless steel construction, integrated cooling, and full instrumentation. We do not import generic ozone generators and rebadge them. We build, we install, and we service.

Corona-discharge ozone generation

All our industrial and commercial ozone generators use corona-discharge (CD) technology. A high-voltage alternating current is applied across a dielectric medium with a small gap, through which a dry oxygen-rich gas flows. The corona splits O₂ molecules and recombines them as O₃ at concentrations of typically 8–14% by weight when oxygen-fed, or 1–3% when air-fed. Corona-discharge is the only mature, high-output ozone generation technology suitable for industrial use — UV ozone generation is fine for very small (gram-per-hour) applications, but cannot produce the concentrations or volumes needed for commercial water treatment. Our generators use medium-frequency (~1 kHz) inverter drives for tight output control between 1% and 100%, allowing precise ozone dosing to match changing demand.

Generator range and capacities

Our standard range covers 10 g/hr to 5 kg/hr ozone output. Small generators (10–50 g/hr) are typically used in small bottled-water plants, mid-size aquaculture systems, winery barrel sanitation programmes and laboratory R&D. Medium generators (50 g/hr – 1 kg/hr) suit larger water-treatment installations, municipal-scale potable water plants for smaller communities, dairy and food processing CIP systems, and cooling-tower disinfection. Large generators (1–5 kg/hr) are deployed for major municipal drinking-water plants, industrial wastewater treatment, RAS aquaculture and large bottled-water facilities. For applications above 5 kg/hr we deliver multi-generator skid systems with intelligent load sharing. Every generator is paired with the correct feed-gas source (oxygen concentrator, PSA system or liquid O₂).

Built for New Zealand conditions

Coastal NZ installations demand corrosion-resistant construction — our cabinets are powder-coated stainless steel as standard, with full IP-rated enclosures available. All ozone-wetted internals are 316L stainless, PVDF, PTFE or ozone-grade Viton. Generators are rated for the New Zealand grid (230 V single-phase or 400 V three-phase, 50 Hz) and certified to AS/NZS 3000 electrical standards. Cooling is closed-circuit water (with optional chiller) or air, depending on capacity. Seismic restraint and earthquake-rated mounting designs are available for high-risk zones. All control panels are touchscreen HMI with full SCADA-ready Modbus or Ethernet/IP communications. Data logging is built in to every panel for regulatory and operational reporting.

Where our ozone generators are operating

Our generators are installed in hundreds of New Zealand sites and across the Pacific. Reference installations include Coca-Cola Amatil's PUMP bottled-water plant, NZ Quality Water filler upgrade, Timaru District Council municipal supply, Whanganui District Council drinking water, Waitaki District Council, multiple Fonterra processing sites, Indevin and Craggy Range wineries, DB Breweries, United Fisheries seafood processing, and Reef HQ's marine life-support system. We also export and have systems running in Australia, the Pacific Islands, Kazakhstan and Antarctica. Every installation includes commissioning by our engineers, on-site operator training, full as-built documentation and an ongoing service relationship.

Service, spares and warranty

Every generator carries a 24-month warranty on workmanship and 12 months on dielectric tubes, with extended warranty options available. We stock all critical spares (dielectrics, gaskets, valves, transformers, controllers) at our Napier workshop. Scheduled service is typically annual: dielectric inspection, gas-side desiccant or PSA molecular-sieve replacement, dissolved-O₃ probe calibration, leak testing and electrical safety check. Most service tasks can be completed on site within a single day. For mission-critical installations we offer fully remote monitoring — our engineers can see your generator's run-state, fault history and performance trends in real time, often diagnosing issues before they become outages.

Key benefits

What you can expect from a Ozone Generators NZ project with Ozone Technologies.

Capacity range: 10 g/hr to 5 kg/hr — and multi-unit skids beyond
Corona-discharge with medium-frequency inverter drive (1–100% turndown)
Built in Napier from 316L stainless and ozone-compatible elastomers
Touchscreen HMI, SCADA-ready (Modbus / Ethernet/IP)
Designed to AS/NZS 3000 — NZ electrical compliance out of the box
Local spares, 24-hour callout, remote monitoring options
24-month workmanship warranty, 12-month dielectric warranty
Optional integrated PSA oxygen feed, chiller and ozone destruct

Quick answers

Common questions

What is an ozone generator?

An ozone generator is a device that produces ozone gas (O₃) on demand from a feed of dry oxygen or air. For commercial and industrial water treatment the standard technology is corona-discharge, which uses a high-voltage electric field across a dielectric to split O₂ molecules and recombine them as O₃.

How does a corona-discharge ozone generator work?

A high-voltage alternating current is applied across a dielectric medium (typically a ceramic or glass tube) with a small gap, through which dry oxygen-rich gas flows. The corona splits some O₂ molecules and they recombine as O₃. The ozone-laden gas leaves the generator and is dosed into the water through a contactor or injector.

What size ozone generator do I need?

Generator size is set by the ozone demand of the application: target flow rate, the contaminants of concern, the required CT-value (concentration × contact time), and the off-gas margin you need. Our engineers size every generator from a water-quality and process audit. As a rough guide, capacities run from 10 g/hr for very small applications to 5 kg/hr for major industrial sites.

What is the difference between air-fed and oxygen-fed ozone generators?

Air-fed generators draw dry ambient air and produce ozone at roughly 1–3% by weight. Oxygen-fed generators run on concentrated oxygen (typically 93–95% from a PSA unit) and produce ozone at 8–14% by weight. Oxygen-fed is more energy-efficient, more compact for the same output, and is the standard choice for industrial and municipal water treatment.

What safety equipment is needed with an ozone generator?

A complete system normally includes: ambient ozone gas detectors in the plant room with alarm-linked shutdown, dissolved-ozone monitoring on the treated water, an ozone-destruct unit on the contactor off-gas, pressure and temperature interlocks on the generator, and clear operator training. All our generators ship with these as part of a documented control philosophy.

Who supplies industrial ozone generators in New Zealand?

Ozone Technologies Ltd designs and builds industrial ozone generators in our Napier workshop, with engineering, installation, commissioning and servicing all delivered by our own team. We are an OEM, not a reseller. Talk to us at /contact to scope a system, or see /products for the standard range.

More background: case studies · about Ozone Technologies · contact an engineer.

Get expert advice on your ozone generators project

Tell us about your application and we'll come back to you within one business day with a tailored response from one of our engineers.

+64 6 8432881 info@ozonenz.comNapier, New Zealand