V-PRO™ Low Temperature Sterilizers
Setting the record straight
Industry claims surrounding low‑temperature sterilization may have created confusion about safety, performance, and design differences between systems. This page brings together validated data, published standards, and product information to clarify how V‑PRO™ Sterilizers work and how they compare across key considerations, including staff safety, sterilization technology, capacity, cost per cycle, and device compatibility.
In Sterile Processing, Decisions Should Be Guided By Facts
Below, you’ll find the data and sources behind each topic so you can evaluate the facts with confidence:
V-PRO Fact #1
Independent testing using OSHA‑validated air sampling methods confirmed that V-PRO™ Sterilizers hydrogen peroxide exposure to users is well below ACGIH safety limits.
Breathing zone measurements are the most relevant to understanding employee safety, as these measurements evaluate actual employee exposure. In accordance with the OSHA method 1019, a calibrated pump was used to draw air across a coated filter. The measurements were collected at three (3) locations: above the door of the V-PRO maX 2 Sterilizer, above the door of the V-PRO s2 Sterilizer, and in the employee’s breathing zone.
Measurements taken at the breathing zone of the employee and above both sterilizers were below the OSHA PEL of 1 ppm over an 8-hour TWA and 5 ppm over a 15-minute TWA, as well as below PELs established outside the United States.
Sources: OSHA Occupational Safety and Health Standards, 29 CFR 1910.1000, TABLE Z1. OSHA Test Method 1019 for Hydrogen Peroxide. ACGIH 2016 TLVs® and BEIs®, ISBN 978-1-607260-84-4
V-PRO Fact #2
Published data shows that plasma may affect some materials. V-PRO Sterilizers are plasma free by design.
Plasma generated in STERRAD 100NX and NX Sterilizers has been shown to cause secondary reactions that degrade non‑metallic surfaces, including soft plastics and flexible endoscope insertion tubes. In comparative evaluations, endoscopes processed in STERRAD Sterilizers showed rough, dull surfaces, while those processed in V-PRO Sterilizers remained smooth and glossy.
Sources: AAMI TIR17:2017 – Compatibility of Materials Subject to Sterilization. STERIS M3644EN.2023-04, Rev. C. STERRAD NX Technical Information AD-52972 Rev A. STERRAD NX Technical Information AD-54083-001 Rev B
V-PRO Fact #3
In a Low Temperature Sterilization System, such as V-PRO™ Sterilizers or STERRAD™ Systems*, vaporized hydrogen peroxide provides sterilization.
Some systems use plasma as well, but both technologies require vaporized hydrogen peroxide for sterilization.
V-PRO Sterilizers were intentionally designed without the use of plasma, allowing greater material compatibility, less instrument damage, faster cycles, reduced risk of aborted cycles, and more usable space in the sterilizer chamber due to the absence of a plasma coil.
Sources: CDC – Hydrogen Peroxide Gas Plasma, Guideline for Disinfection and Sterilization in Healthcare Facilities, p.19. Berger et al., American Journal of Infection Control, 2022, pp. 205–209. ISO 14937:2009, Clauses 4–6.
V-PRO Fact #4
V‑PRO™ maX 2 Low Temperature Sterilization Systems deliver 43% lower cost per-cycle on average compared to STERRAD™ Systems, plus you can sterilize up to 50lbs per cycle.
To determine this difference, we use the following pricing data to determine the midpoint percentage comparison:
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STERRAD: 100NX Cassette Case (Item 10144) = $221.60
10 standard cycles per case = $22.16 per cycle
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V-PRO: VAPROX Cup Case (Item PB011) = $639.45
45 standard cycles per case = $14.21 per cycle
Sources: Pricing date from ECRI Data Pulled 3/5/26
V-PRO Fact #5
V‑PRO Sterilizers have 46% more usable chamber volume than STERRAD systems. According to the STERRAD 100 and 100NX Sterilizer Operator Manuals, the total chamber volume is 152 L, with only 93 L of usable space due to the plasma coil, reducing usable space.
With V-PRO Sterilizers, you can PROCESS MORE with 46% more: 136 L of usable chamber space.
Sources: V-PRO Sterilizer Operator Manuals, STERRAD 100 and 100NX Sterilizer Operator Manuals, 136 L versus 93 L
V-PRO Fact #6
Per AAMI ST58 (2024), device compatibility depends on device IFUs AND/OR sterilizer claims.
This recent inclusion of “OR” gives facilities the option (when deciding whether a device is compatible with V-PRO) to consider either the medical device IFU or the sterilizer manufacturer's IFU, cleared claims.
V‑PRO™ Sterilizers support a broader range of materials and lumen configurations than other low-temperature sterilizers, helping expand eligible devices based on cleared claims.
Sources: ANSI/AAMI ST58:2024 section I.3. Device claims are available in the V-PRO Sterilizer Operator Manual
*STERRAD™ is a trademark of ASP Global Manufacturing, GmbH.
V-PRO™ is a trademark of STERIS.