Description
THORN SECURITY LIMITED
MR301EX
OPTICAL SMOKE DETECTOR
SCN 516.021.003
BASEEFA NO. EX 88B2168X EEX IA IIC T5
CEQ= 1.5NF
UMAX= 28V
WMAX= 0.58W
The Thorn Security MR301EX is an intrinsically safe optical smoke detector designed for use in hazardous area fire detection systems aboard commercial and industrial vessels. Carrying BASEEFA certification to EEx ia IIC T5, it is suitable for installation in Zone 0, 1, and 2 classified spaces where conventional detectors cannot safely operate. As a core component within a marine fire alarm system, it provides reliable early smoke detection to protect crew, cargo, and vessel integrity in compliance with onboard safety requirements.
Key Features
✓ Optical smoke detection principle provides reliable early warning of smouldering fires without ionisation sources.
✓ Certified to BASEEFA EEx ia IIC T5 with a maximum supply voltage of 28V and maximum power consumption of 0.58W, as stated in original product data.
✓ Intrinsically safe design (ia category) makes it suitable for integration into fire alarm loops serving classified hazardous areas — compatibility with specific panels subject to confirmation.
✓ Intended for installation in enclosed hazardous spaces such as engine rooms, pump rooms, or cargo areas where explosive atmospheres may be present; SOLAS fire detection requirements apply in many such locations.
✓ Direct replacement for existing MR301EX installations; original SCN reference 516.021.003 supports accurate cross-referencing during planned maintenance or emergency spares procurement.
Marine Applications
✓ Tankers and chemical carriers requiring intrinsically safe fire detection in pump rooms and cargo spaces classified as hazardous areas.
✓ Offshore support vessels and platform supply vessels where explosion-protected detection equipment is mandatory in designated zones.
✓ Engine room and machinery space fire alarm loops on vessels operating under SOLAS Chapter II-2 fire safety requirements.
✓ Gas carriers and LNG vessels where IIC gas group certification is essential for detector compatibility with the onboard hazardous area classification.
✓ Industrial and naval vessels requiring certified smoke detection in battery rooms, paint stores, or other enclosed spaces with potential flammable atmosphere.
Why Marine Engineers Choose
The Thorn MR301EX is a well-established intrinsically safe optical detector with clearly defined electrical parameters and a recognised hazardous area certification, making it a dependable choice for maintaining fire detection integrity in classified spaces without compromising zone safety.
Ideal For
Tankers, chemical carriers, gas carriers, offshore support vessels, platform supply vessels, and any commercial vessel requiring certified intrinsically safe smoke detection within a hazardous area fire alarm system.
Technical Support
Technical support is available for the Thorn MR301EX and associated fire alarm system components. Assistance covers onboard installation guidance, detector loop troubleshooting, and remote diagnostic support to help keep your fire detection system fully operational.
