MC Low Pressure Mercury Vapour

Updated
21-VII-2021
Mercury Vapour lamps operating at low pressure and with discharge tubes of soft glass are classified as the MC family. The vapour pressure is typically just a few hundredths of an atmosphere, these conditions leading to maximum efficacy for the generation of UV-C radiation at 253.7nm. The positive column types generally dissipate fewer than 10 watts per centimetre of discharge length, but there also exist certain variants based on glow discharge or even arc discharge types, in which the mercury vapour pressure remains low due to the relatively large envelope dimensions.

The MC class of discharge lamp was specifically created to drive fluorescent lamp technology. Because of the great variety of fluorescent lamps, these are classified elsewhere on this site under the section of that name. There do exist however a few specialised low pressure mercury lamps having no fluorescent coating, or in which the coating is optimised for the generation of ultraviolet radiation. Such lamps are catalogued under this page.

Glow Discharge

GE

400W

S-1 Ultraviolet Sunlamp, Thermionic discharge
~1950

GE

85W

S-2 Ultraviolet Sunlamp, Thermionic discharge
1939

GE

4W

G4S11 Ozone Producing Thermionic discharge
1959

Thorn

4W

M2 miniature ultraviolet source
1975

Osram

9W

HNV miniature Woods' glass blacklight
1943

GE

4W

F5000 DC Discharge Fluorescent Blacklight
1950 c.

SPO Svet

4W

LUF-4 DC Discharge Fluorescent Blacklight
1989

SELA Abadie

4W

Abadie 6002 DC Fluorescent Blacklight
1992
   

Positive Column Discharge

Osram

13W

HgN miniature UV-A source
1950

Philips

6W

TUV Germicidal lamp with internal resistance
1992

Philips

6W

TW Blacklight lamp with internal resistance
1983

Osram

10W

HNS 10W/U OFR U-Tube Germicidal Ozone Free
1973