Brand: C-TEC

C-TEC CPDUCT/OPT CAST-PRO Duct Smoke Detection Kit

Name: C-TEC CPDUCT/OPT CAST-PRO Duct Smoke Detector
Brand: C-TEC
SKU: CPDUCT/OPT

Description

The C-TEC CPDUCT/OPT is a duct smoke detection kit for the CAST-PRO range. It consists of a CP416 CAST-PRO optical detector on a CA408 CAST base in a housing that is mounted outside an air duct and samples the duct air through a venturi tube. The tube has dual sampling ports positioned at the optimum separation points, so reliable smoke detection is possible even at very low air velocities; the manufacturer states that the system meets its requirements from 0.5 to 20 m/s.

Technical specifications

Parameter	Specification
Order code	CPDUCT/OPT CAST-PRO air sampling smoke detection kit
Kit contents	CP416 CAST-PRO optical detector on a CA408 CAST base inside a duct housing; venturi tube supplied separately
Certification	CP416 detector: KIWA, EN54-7:2018, EN54-13 and EN54-17; CPDUCT/OPT assembly: CNBOP, EN54-27:2015
Air velocity range	0.5 to 20 m/s (100 to 4,000 ft/min)
Operating voltage	22 to 40 V DC, CAST loop powered
Current consumption	Quiescent 570 uA; active below 1 mA
Protocol and panels	CAST (C-TEC); C-TEC CAST fire alarm control panels
Detector setting	CP416 must be set to Mode 1
Venturi tubes	ST-2 aluminium 0.6 m (duct up to 0.6 m wide); ST-5 1.5 m (duct 0.6 to 1.4 m); ST-EXTEND 1.06 m extension (duct over 1.4 m)
Duct hole	38 mm diameter; 51 mm with the UG-MB-75 bracket
Terminals	0.25 to 2.5 mm2 cable; loop in/out, optional remote LED and screen connections
Environment	-10 to +40 degC; IP54, indoor use only; maximum 95 percent RH non-condensing; weight 1 kg
Accessories	UG-MB-75 mounting bracket; UG-COVER-75 IP67 waterproof cover; HFU204 rubber gasket

How the sampling works

Air is drawn through the venturi tube into the optical detector, giving continuous sampling of the duct air. The installer’s guide states that the CP416 detector is certified by KIWA to EN54-7:2018, EN54-13 and EN54-17, and that the CPDUCT/OPT assembly is certified by CNBOP to EN54-27:2015, the standard for duct smoke detectors. The detector cover has a test hole for functional testing with smoke detector test spray, and the kit is loop powered at 22 to 40 V DC. The CP416 inside must be set to Mode 1.

Installation and selection

The housing may be mounted on the top, bottom or side of the duct with the detector oriented in the direction of airflow, away from heating, cooling and humidity control devices, duct bends, junctions and air inlets. A 38 mm hole is drilled in the duct, or 51 mm when the optional UG-MB-75 bracket is used on insulated or circular ducts. The venturi tube is ordered separately by duct width: the 0.6 m tube ST-2 for ducts up to 0.6 m, the 1.5 m tube ST-5 for ducts between 0.6 and 1.4 m, and the ST-EXTEND extension for ducts above 1.4 m. The tube should extend about 90 percent of the duct width and must not protrude more than 30 mm through the duct wall. The rating is IP54 for indoor use; fit the UG-COVER-75 where condensation can occur, such as outdoors or in unheated roof spaces, to give IP67 protection. Note also that the guide limits operation to -10 to +40 degC.

Where it fits

Duct detectors are used in air handling systems to detect smoke in the airflow, for example so that fans can be shut down or dampers closed through the panel cause and effect programming. The final design, including detector location and the actions on alarm, remains the fire engineer’s responsibility, and the manufacturer notes it accepts no responsibility for the compliance of the system as a whole.

How the C-TEC CPDUCT/OPT works

A venturi tube sits across the duct and draws a small flow of duct air into the housing. The CP416 optical detector inside samples that air continuously. The detector reports through the CAST loop to the fire alarm control panel.

Where the CPDUCT/OPT is used

Air handling ducts
Ventilation systems
Ducts with low air velocity
Buildings with a CAST-PRO fire system
Indoor duct installations

Selection checklist for the CPDUCT/OPT

Duct width
Air velocity
Venturi tube length
Mounting position
Fire panel type
Loop wiring
Accessories needed
Indoor location

Installation, commissioning and maintenance notes for the CPDUCT/OPT

Cut a hole in the duct for the venturi tube and fix the housing outside the duct. Set the CP416 detector to Mode 1 and connect the loop wiring. Test with smoke detector test spray through the cover test hole, and check at regular intervals.

Requesting a quotation for the C-TEC CPDUCT/OPT

Please send the duct width, the air velocity and the control panel in use. Seven Star LLC serves industrial customers in Oman and the GCC and replies with a quotation based on the information provided.

CPDUCT/OPT kit type

It is a duct smoke detection kit for the CAST-PRO range.

CPDUCT/OPT detector

It uses a CP416 CAST-PRO optical detector.

CPDUCT/OPT base

The detector sits on a CA408 CAST base.

CPDUCT/OPT mounting

The housing is mounted outside the air duct.

CPDUCT/OPT sampling

It samples the duct air through a venturi tube.

CPDUCT/OPT sampling ports

The tube has dual sampling ports at the optimum separation points.

CPDUCT/OPT low velocity

Reliable detection is possible even at very low air velocities.

CPDUCT/OPT air velocity range

The air velocity range is 0.5 to 20 m/s.

CPDUCT/OPT venturi tube supply

The venturi tube is supplied separately.

CPDUCT/OPT short tube

The ST-2 aluminium tube is 0.6 m long for ducts up to 0.6 m wide.

CPDUCT/OPT medium tube

The ST-5 tube is 1.5 m long for ducts 0.6 to 1.4 m wide.

CPDUCT/OPT extension

The ST-EXTEND is a 1.06 m extension for ducts over 1.4 m wide.

CPDUCT/OPT duct hole

The duct hole is 38 mm in diameter, or 51 mm with the UG-MB-75 bracket.

CPDUCT/OPT operating voltage

The operating voltage is 22 to 40 V DC.

CPDUCT/OPT loop power

The kit is powered from the CAST loop.

CPDUCT/OPT current

Quiescent current is 570 uA and active current is below 1 mA.

CPDUCT/OPT protocol

It uses the C-TEC CAST protocol.

CPDUCT/OPT detector mode

The CP416 must be set to Mode 1.

CPDUCT/OPT terminals

Terminals take 0.25 to 2.5 mm2 cable.

CPDUCT/OPT remote LED

A remote LED connection is optional.

CPDUCT/OPT test hole

The detector cover has a test hole for functional testing.

CPDUCT/OPT environment

The kit is for indoor use from minus 10 to plus 40 degrees C.

CPDUCT/OPT humidity

Maximum humidity is 95 percent, non-condensing.

CPDUCT/OPT weight

The weight is 1 kg.

CPDUCT/OPT accessories

Accessories are the UG-MB-75 bracket, the UG-COVER-75 waterproof cover and the HFU204 rubber gasket.

Detector records for the CPDUCT/OPT

Record the duct, the tube length and the date of each spray test.

Choosing the right CPDUCT/OPT tube

Choose the venturi tube from the width of the duct it must cross.

Documents and quotation

The linked file is the two-page C-TEC CPDUCT/OPT installer’s guide (DFU4110020 Rev 2, 28/07/2026). Before ordering confirm the duct width and so the venturi tube length, the accessories needed, the CAST-PRO panel compatibility and the approvals the project requires; the site also lists the C-TEC CP416 CAST-PRO smoke detector, and other fire and gas detectors are available. Seven Star LLC, an independent supplier in Muscat, will prepare a quotation from your project requirements.

Datasheets & Documents

Manual C-TEC CPDUCT/OPT installer's guide (DFU4110020 Rev 2) Download

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About brand

C-TEC has made life safety electronics in Wigan, United Kingdom since 1981: fire alarm panels, detectors, power supplies, disabled refuge and call systems. Seven Star LLC, an independent supplier in Oman, lists C-TEC panels and detectors such as the XFP501/CA single loop addressable fire panel, the CP416 CAST-PRO addressable optical smoke detector and the CFP708-4 eight zone conventional fire alarm panel.

C-TEC fire alarm families

The manufacturer divides fire systems into conventional and addressable. On the conventional side are the CFP panels in 2 to 8 zones, with ActiV detectors, sounders and call points. On the addressable side, XFP panels cover one or two loops and ZFP panels up to eight, working with C-TEC's own CAST protocol and CAST-PRO devices. Addressable panels are also made for Apollo XP95 and Discovery and for Hochiki ESP devices, so the protocol of a panel must match the detectors on its loop. EN54-4 power supplies, SigTEL refuge systems and EVAC-ALERT panels complete the range.

Ordering C-TEC equipment: what we need

Send the full part number including the suffix after the slash, which separates protocol versions of the same panel. Tell us the detector protocol already on site, the number of loops or zones, and any network or repeater requirement. For projects in the GCC, name the approval the consultant specifies so we request the matching certificates from the manufacturer.

Browse C-TEC products by category: Logic Controller, Fire & Gas Detector.