OMG (SIEL) Seal MK1 Pro

Database Italian Oxygen rebreathers

OMG (SIEL) Seal MK1 Pro

OMG Seal MK1 Pro

ModelDateAuthor
MK1 Pro13-04-2019JW. Bech
ManufacturerOMG (SIEL)
ModelMK1PRO
Country of originItaly
Design Year
Production yearsThe years known this model was produced
Breathing typeDual hoseDual hose or Pendulum
User groupMilitaryCivil / Military
Other name used for this modelSeal MK1 pro
Working PrincipleManual addition, CM flowConstantmass flow, Manual addition, Valve operated, On demand, Electronic
Gasoxygen
Cylinder volume0,8 ltr
Max cylinder pressure230 bar
Cylinder materialaluminium
Loop volume8,5 ltr
LongtypeSIngleSingle/Dual
Scrubbersize1,35 kg
ScrubbertypeAxial/Radial
Scrubber volume
Factory adviced scrubber medium
Divetime duration100 min
Operating temperature-2 - 40 degr C
Magnetic signatureMagentic/
Nonmagentic
Weight on land8,4 kgs
Weight in waterneutral
Factory advised maximum operating depth>12 m
Colorblack
WornBoth front & backFront/Back/Both
Mouthpiece styleWith valveFixed/ with valve / with position to ambient air
Additional info 1
Additional info 2
Additional info 3
Infosource
Thanks to
Revision date

JW

Therebreathersite was founded by Jan Willem Bech in 1999. After a diving career of many years, he decided to start technical diving in 1999. He immediately noticed that at that time there was almost no website that contained the history of closed breathing systems. The start for the website led to a huge collection that offered about 1,300 pages of information until 2019. In 2019, a fresh start was made with the website now freely available online for everyone. Therebreathersite is a source of information for divers, researchers, technicians and students. I hope you enjoy browsing the content!