Gas Detection Equipment

Suite 9, Red Tree Business Suites, 24 Stonelaw Road, Rutherglen, Glasgow, G73 3TW

Tel +44 (0)141 613 2138



MSA Ultima MOS-5 and Ultima MOS-5E

ULTIMA MOS-5 and MOS-5E detect ppm levels of hydrogen sulphide (H2S), providing status indication and alarm outputs. Their performance is based on their metal oxide semiconductor sensor with unique technical parameters. High tolerance for a broad range of temperatures, humidity levels, as well as short-term high H2S concentrations and very low cross sensitivity to common gases make these detectors ideal for installation in harsh environments.
The ULTIMA MOS-5 provides analogue 4–20 mA and 3 relay outputs in a stainless steel housing. The ULTIMA MOS-5E incorporates analogue 4–20 mA and three open collector outputs in an aluminum housing. HART and Modbus communication enable complete status and control capability in the control room.

For more information, please see leaflets 07-481.2 and 07-482.2.

ATEX    II 2GD EEx d IIB+H2 T5, SIL 2 and SIL 3, IP66, HART registered (ULTIMA MOS-5) ATEX    II 2G EEx d e m IIC T4, SIL 3, IP66/67 (ULTIMA MOS-5E)

Features and Benefits

Ultima MOS-5
Event logging stores fault, gas check, calibration, and alarm event history
4-20 mA output is the industry standard for remote alarm and fault indication
HART and ModBus communication provides complete status and control capability in the control room
Detection ranges: 0-20 ppm, 0-50 ppm and 0-100 ppm enable a wide range of applications
Warning, Alarm & Fault Relays provide local alarm capability
Calibration, Calibration Check, and Set-up Modes simplify operation and maintenance
Remaining Sensor Life Indication reduces downtime by providing an estimate of remaining sensor life
Wireless capability is compatible with ELPRO Technologies wireless devices

Ultima MOS-5E
RS-485 Dual ModBus Serial Interface in addition to 4-20 mA provides measurement, set-up and status of up to 247 nodes
18.5-35 VDC operation allows longer cable runs and lower cost installation
User changeable H2S range enables convenient, flexible operation
3 digit display shows over-scale readings and alarm status
Single-point calibration provides easy, fast and simple one-man calibration
Fully adjustable and configurable open collector outputs result in lower wiring cost and flexible operation


Drilling Platforms and Rigs
Gas and Oil Production Platforms
Mud Logging Operations
Desulphurisation Facilities
Heavy Water Nuclear Facilities
Wastewater Treatment Plants
Chemical Plants
Well Head Sites
Oil Recovery/Reinjection Sites