Orbis I.S. Multisensor Detector

Product code: ORB-OH-53027-APO

ORB-OH-53027-APO - Orbis I.S. Multisensor Detector
The Orbis IS Multisensor Smoke Detector benefits from the same false alarm technology as the Optical Smoke Detector with the addition of a heat sensing element.
Full details

Application environments

Clean rooms

Dusty environments

Hazardous areas

Offshore platforms


Small to medium buildings


Brand Features

TimeSaver® Base Patented FasTest® enabling functional testing in four seconds DirtAlert® indicates limit of drift compensation Tolerates extreme operating conditions: -40°C to +70 °C False alarm reduction Flashing LED option

Maintenance & Service

Servicing of I.S. fire detectors may be carried out only by BASEEFA authorized body. In practical terms this means that Apollo Orbis I.S. fire detectors may be serviced only by Apollo at its factory. Servicing of the fire detection system should me carried out as recommended by the code of practice BS 5839: Part 1 or other local regulations in force.

Additional Information

Environmental Characteristics

The environmental performance of the multisensor detector is the same as that of the Orbis IS optical smoke detector. Also classification and BASEEFA Certificate Number are the same as for the optical smoke detector. Operating and storage temperature: –40°C to +70°C Operating temperature is restricted by the intrinsic safety gas classification. Class T5: –40°C to +45°C Class T4: –40°C to +60°C The detector must be protected from conditions of condensation or icing.

Additional Information 1

Wiring and cable types It is not permitted to connect more than one circuit in the hazardous area to any one safety barrier and that circuit may not be connected to any other electrical circuit. Both separate and twin cables may be used. A pair contained in a type 'A' or 'B' multicore cable (as defined in clause 12.2.2 of BS EN 600079-14:2008) may also be used, provided that the peak voltage of any circuit contained within the multicore does not exceed 60V. The capacitance and either the inductance to resistance (L/R) ratio of the hazardous area cables must not exceed the parameters specified in datasheet PP2479. The reason for this is that energy can be stored in a cable and it is necessary to use cable in which energy stored is insufficient to ignite an explosive atmosphere. To calculate the total capacitance or inductance for the length of cables in the hazardous area, refer to datasheet PP2479, which gives typical per kilometer capacitance and and inductance for commonly used cables. (Note: all Orbis I.S. devices have zero equivalent capacitance and inductance.) Maximum loading of I.S. circuit Because of the finite resistance of the safety barrier, there will be a limit to the current drain which can be tolerated before the voltages on the circuit fall outside the specified limits for Orbis I.S. devices. The system certification allows up to 250 Orbis I.S. detectors to be connected to a single barrier circuit with an end-of-line resistor or not less than 1.8Ω. However, it must be ensure that the voltage available at each detector is above at the minimum specified in the quiescent condition. It is also important to ensure that the alarm load is suitable for the control and indicating equipment. the system certification also allows the use of remote LED indicators. These may be connected to individual detectors or may use a connection common to two or more detectors.

Product Information

The Orbis IS Multisensor Smoke Detector benefits from the same false alarm technology as the Optical Smoke Detector with the addition of a heat sensing element.

Key Features

Reduces false alarms Sensitive to fast burning, flaming fires Improved sensitivity to black smoke Compensation for slow changes in sensitivity Algorithms for reliability of alarm

Additional Information 2

Installation It is important that the Orbis I.S. detectors be installed in such a way that all terminals and connections are protected to at least IP20 when the detector is in the base. Special care must be taken with the rear of the mounting base where live metal parts may be accessible. Flush mounting of the base on a flat surface will provide the required degree of protection. The conduit box available from Apollo, part no. 45681-204, is also acceptable for mounting I.S. bases. Apollo also supply a range of deckhead mounting boxes. For more information, please refer to PP1089, bases and accessories brochure. Note that the earth terminal in the base is provided for convenience where continuity of a cable sheath or similar is required. It is not necessary for the correct operation of the detector nor is it provided as a termination point for a safety earth.

Additional Information 3

Search engine tags

ORBOH53027APO, ORBOH53027, ORB-OH-53027, ORB OH 53027 APO, ORB OH 53027

  • Clean rooms
  • Dusty environments
  • Hazardous areas
  • Offshore platforms
  • Refineries
  • Small to medium buildings
  • Warehouses
Fire TypeFast and slow burning fires
Warranty10 year
Chamber typeChevron
Maximum power-up time<20 seconds
Quiescent current85μA
Supply voltage (min)14V dc
Supply voltage (max)28V dc
Supply voltage (Vmin-Vmax)14 to 28V dc
Sampling frequencyOnce every 4 seconds
PolarityL1 & L2 are polarity sensitive
Minimum 'detector active' voltage12V
Holding voltage (min)5V
Minimum voltage to light alarm LED6V
Alarm reset voltage<1V
Alarm reset time1s
Humidity (min)0% RH
Humidity (max)98% RH
Humidity Noteno condensation or icing
Humidity0% to 98% (no condensation or icing)
Operating temperature (min)-40°C
Operating temperature (max)70°C
Operating temperature-40 to 70°C
IP rating ValueIP23D
Storage temperature (min)-40°C
Storage temperature (max)70°C
Storage temperature-40 to 70°C
  • VdS
  • LR
  • LPCB
  • KRS
  • IECEx
  • FG
  • DNV.GL
  • CPD
  • BV
  • CCS
Materials housingPolycarbonate
Product height (wo/base)50mm
Product length50mm
Product diameter100mm
Detection principle
  • Photo-electric light scattering.
  • Temperature sensitive resistance.
Sensor configurationChamber with surface-mount infrared emmiter and prism. Solid state integrated photo-diode and amplifier.
How to Order

Apollo is dedicated to ensuring that our customer service is aligned with your expectations. This includes making our order, service and delivery process a seamless and hassle-free experience.

Full details of our service standards can be downloaded here.

Existing customers

Please email your order to us at: or tel: 023 9245 6530.

New customers

Please email your order to us at: or tel: 023 9244 2700.


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Please note…

Remember to quote your account number and purchase order number on any order correspondence.

All orders must be over £50.00 (excluding carriage). Any orders received under the minimum order value will be returned to sender for revision.