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tec3_vap_cage_isoOhmeda TEC 3

Perhaps the most popular vaporizer in the veterinary industry. Available as a refurbished or as a brand new unit. TEC 3 vaporizers are available for Isoflurane, Sevoflurane, cagemount style,quickmount style and with selectatec manifolds. Also available as a funnel fill or a keyfill unit. (1 Year warranty)
 tec4_iso_funnelOhmeda TEC 4

The Ohmeda

 TEC 4 is available for all machines using Quickmount or Selectatec mounting systems. It is available as a Funnel Fill or Keyfill, as well as for Iso or Sevo applications. Conversion manifolds are available for mounting to anesthesia machines with cagemount capability only. Built in safety interlock system. (1 Year warranty)

 ohio100_iso_funnelOhio 100

The Ohio 100 has been a workhorse for the veterinary industry. Available as a refurbished  
unit, in Isoflurane service only, with cagemount style system. (1 Year warranty)

Ohmeda TEC 5tec5_iso_funnel

From the family of the ever reliable 100,TEC 3 and TEC 4 the TEC 5 is similar to the TEC 4 but with higher capacity and increased precision. It is available as a Funnel Fill or Keyfill, as well as for Iso or Sevo applications. Conversion manifolds are available for mounting to anesthesia machines with cagemount capability only. Built in safety interlock system.(1 Year warranty)

 penlonnew_iso_key_selecPenlon  Sigma Delta

Available as a Cagemount,
Quickmount or Selectatec mounted system, also available in Iso or Sevo configuration.New and Refurbished units are always available, in multiple configurations.. Built in Safety Interlock system, and MRI compatible (1 Year warranty) 250ML Capacity

 vap_drager19.1_iso_keyDrager 19.1

The Drager 19.1 is another workhorse of the industry. Available as a Cagemount  with either Funnel fill or Keyfill system. It is available for Isoflurane or Sevoflurane service. (1 Year warranty)                            


The anesthesia vaporizer is a critical component of your anesthetic machine. It is very important to ensure that the appropriate percentage of anesthetic agent is being delivered. A malfunctioning vaporizer can be the cause of inappropriate depth of anesthesia (ex: animals under too lightly or too deep) and may also be the reason you “lose” a patient.


Most vaporizers used today in veterinary practices are used with either Isoflurane or Sevoflurane.

Frequency of service

You should have your veterinary anesthesia machine maintained annually. Leaks on your machine can provoke dilution of anesthetic gasses and pollute your environment, not to mention increase your operating costs. “The fact that you have no problems keeping your animals under does not mean that your staff are not breathing the gasses all day long as well”. At the time of service the technician should have an anesthetic agent monitor and should provide you with the readings of the vaporizer. It is important to note that these readings are only an indication of the vaporizer output at the time of inspection, it is not a calibration. Calibration of vaporizers is impossible to perform “on-site” as it must be done in a controlled environment. Anyone who tells you otherwise is misleading you.

Most vaporizers on the market are considered “in spec.” if the output is within +- 15% of the dial setting. If the output is beyond that, the technician will recommend exchanging your vaporizer with a freshly calibrated one or to send your vaporizer out for recalibration.


Isoflurane & Sevoflurane

Since these agents do not contain Thymol, they do not leave deposits in the vaporizer and need less frequent recalibrations. It is still necessary to have the output checked annually when verifying your anesthesia machine.An indication that your vaporizer is due for recalibration is if you find yourself routinely having to use concentrations higher or lower than you generally use. Naturally, it is assumed that you perform daily leak checks on your anesthesia machine.

Why can’t vaporizers be serviced on-site?

Vaporizer output is affected by the temperature of the agent. The colder the agent, the lower the vaporizer output; the hotter it gets the higher the output. Several factors affect the temperature. The oxygen flow through the anesthesia vaporizer cools the agent down; the room temperature affects the vaporizer temperature. The vaporizer contains a thermostat which regulates the output to compensate for these temperature variations but it has its limits. In order to recalibrate the thermostat it must be done in a temperature controlled environment.

Adjustments are made at precise temperatures and rechecked with a minimum pause of 4 hours between adjustments to confirm stability. Several subsequent identical readings are required before considering the calibration to be valid. This process may take up to 5 days. Once completed, the vaporizers are fully dried before shipping.


Replacement parts

During the recalibration process, many parts require replacement. The wick assemblies, the o-rings, etc., should always be replaced. Any other worn part should also be replaced.


Preparation for shipping

Before sending your vaporizer for recalibration it must be drained of all agents. Leaving agent in the vaporizer can cause damage. Proper packaging is very important.


First use

When you fill your vaporizer for the first time it may seem that you are losing agent rapidly. This is normal. A cotton wick inside the vaporizer absorbs a great deal of liquid and requires 2 to 3 fillings before being fully saturated.


What can you expect from US Veterinary Equipment? Expertise

US Veterinary Equipment  has been servicing  veterinary equipment for over 12 years.

Technical support

Techs are available to answer all of your questions and concerns regarding the use and care of your anesthesia equipment, vaporizers and many other products.

Service Reports

Complete reports are filed with all the information regarding any service provided  by a Moduflex tech. These reports indicate concentrations, performance and recommendations.


US Veterinary Equipment  will contact you ahead of time to schedule your preventative maintenance. All previous reports will be checked to follow-up on recommendations which where previously noted.