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Ninety per cent of parts are now manufactured on site in our own dedicated machine shop.

Only operate the vaporiser with dry medical gases

The MSS 3 looks like a Tec 3 but thats where the similarity ends.
Over the past 10 years we have made many improvements to the original design. In addition to those highlighted below (Tec 3). We have created a more stable vaporiser that gives accuracy of output between +/- 2% and 5% of Dial setting, plus a longer period of “Duration of use”.


Calibrated for the specific anaesthetic drug.

Calibrated 0.25 to 5% (Sevoflurane 8%) using a “Laser Refractometer” (Tec 3 0.5 to 5.0% No 8% Sevoflurane).

Temperature, flow and duration of use compensation.

Safety lock to help prevent accidental turn-on of dial.


Calibrated at 22 deg C and 35 deg C +/- 1 deg C.

Calibration range: 0.25% – 0.5% through 5% (Sevoflurane 8%)v.v. (Tec 3 0.5 to 5% No 8% Sevoflurane)).

Fluctuations in temperature, flow rate and duration of use is automatically compensated for during use.

When used with I.P.P.V the variation in output is negligible.

Nominal Working Range : Fresh gas flow – 200 cc to 15 litre/min.

Ambient temperature – 18 deg C to 35 deg C.

Resistance to Gas Flow:

5 cm wg. at “OFF” setting at 5 litre/min oxygen.

21-29 cm wg. when delivering vapour in 5 litre/min oxygen at 21oC.

Liquid Capacity:

Amount of anaesthetic drug to fully charge the vaporiser – 150ml (Tec 3 125ml).

Amount retained by the wick system – 35ml.

Weight & Dimensions

(Screw fill, cagemount)

Weight =  5.5 kg. (Tec 3 – 7.0 kg).

Height =  183mm , Depth 140mm , Width 135mm

Service Options

Option 1. Planned Preventative Maintenance – Once every 3 years the vaporiser should be returned for service incl calibration check

Option 2. After the first 3 years from new, check calibration. Then check the calibration once every following 6 months. If the calibration shows evidence of deterioration, the vaporiser should be returned for service. This requires records to be kept for tracking.

PLEASE NOTE – HALOTHANE Vaporisers should be serviced annually.

Ordering Information

When ordering please specify which variant is required.

Drug type: Isoflurane 5%, Halothane 5%, Sevoflurane 8%, Enflurane 7%

Mounting System: Seletatec? , Cagemount (23mm male/female tapers).

Filling Type: Keyed filling, Screw filling.

The filling adaptor is NOT included but can be supplied on request

Operator Manual

Click here to view the full Operator Manual for the MSS-3 Vaporiser in PDF format.