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Multi Gas Detector (Dräger, Model 31)

Mount Sinai Pathology Lab · Health Sciences

A brown lidded case with a deteriorating plastic covering contains a sampling instrument, instruction booklet, and various consumables. The case has a plastic handle on its lid.

The sampling instrument is a grey and black apparatus consisting primarily of a compressible bellows mechanism between two sturdy surfaces meant to be gripped within one hand. At one end of one of the grip surfaces is a socket meant to hold a consumable “Dräger tube.”

The following was also included within the case.

1 x slot head screwdriver.

2 x paper instruction booklet.

A clear plastic packet (Likely a valve rebuild kit, labelled with Order Code 6727211) contains:
1 x black plastic valve seat.
1 x flexible rubber ring.
1 x metal washer.
1 x flexible rubber bung.
2 x metal slot head machine screws.
3 x metal filter sieves.
3 x flexible black gaskets.
4 x sets of two valve disks in cardboard wrappings.

A clear plastic packet (labelled with Order Code GH 16631) contains:
10 x rubber caps.

Accession Number: 2023.MTS.12

Alternative Name:

Primary Materials: Plastic, Cardboard, Iron Aloy


Stamped on one side of the pump: “0003922/80”
Moulded below this: “Modell 31// V-100 cm3// Dräger// TOV12 RgG 017”

Dimensions (cm):

Case: Height = 16.5, Width = 19.5, Length = 14.


The Multi Gas Detector is a sampling instrument consisting primarily of a calibrated pump. A full squeeze of the bellows draws in 100 cm³ of air through an attached “Dräger tube”. These tubes are used to detect spot concentrations of airborne chemical pollution. Particular tubes are adapted to detecting particular pollutants.


This instrument is incomplete, lacking the consumable glass “Dräger tubes” needed to operate. The pump is in very good condition. The plastic covering of the carrying case has become brittle and fragile. It is cracked and peeling, with some missing pieces.

Associated Instruments:


Drägerwerk AG, Lübeck, Germany.

Date of Manufacture: c. 1978


The Mount Sinai Pathology Lab collection was transferred from a display case on the 6th floor of Mount Sinai Hospital (600 University Ave. Toronto, On) over several days in mid-December 2020.

Additional Information and References:

Note that the Dalla Lana School of Public Health collection includes a second example of this model of instrument (2016.phlt.1.115.1-7). It is of slightly different construction, indicating that it is of an earlier or later design.

Historical Notes:

  • Donated to UTSIC