Heat Detector

KTI07001001HTDT

Product Description

A professional conventional rate-of-rise and fixed-temperature heat detector supplied with base, engineered for open-area fire detection across commercial and industrial facilities.

Detection Method: Dual-action Rate of Rise (ROR) and Fixed Temperature thermal sensing
Fixed Temperature Threshold: 59°C (138°F)
Rate of Rise Threshold: 11.1°C / min (20°F / min)
Operating Voltage: 9V DC to 33V DC
Reset Voltage: Less than 1V DC
Current Consumption: Standby: 50 µA | Start-up: 170 µA | Alarm: 90 mA (Max)
Start-up Time: 60 seconds
Sensor Sampling Cycle: 5 seconds
Remote Indicator Output: 15 mA maximum (open collector)
Status Indication: Dual LEDs providing 360° visual indication
Wiring Configuration: Polarity-free 2-wire loop
Mounting & Base: Regular 100 mm mounting base included
Installation Spacing: 5 meters nominal
Ingress Protection: IP42
Dimensions & Weight: 100 mm diameter × 46 mm height (with base) | 130 g
Operating Environment: -10°C to 37.8°C; 0% to 95% RH (non-condensing)
Compatibility: Standard 2-wire conventional fire alarm control panels
Certifications & Standards: UL Listed

KTI07001001HTDT

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Product Details
Available Brands	Honeywell
Unit	Numbers
HSN Code	85311020
Weight	0.13 kg
Dimension	L 10 x W 10 x H 4.6 cm cm ft in m
Warranty	12 Months Warranty
Tags/categories	Safety Fire Safety Solutions Fire Alarm System Conventional Fire Alarm System

Usually dispatched within 2 days

About this product .

This conventional heat detector features a sleek, low-profile enclosure engineered for unobtrusive ceiling integration. Built to an IP42 ingress protection rating, the assembly includes a dedicated 100 mm detector base and features dual surface-mounted LEDs that deliver 360-degree visual status verification across the room.
Equipped with dual-response thermal sensing, the unit triggers an immediate alarm when the ambient temperature reaches the 59°C (138°F) fixed threshold, or when rapid thermal changes exceed a rate of rise of 11.1°C per minute (20°F per minute). An integrated internal sampling circuit operates on a continuous 5-second cycle time to ensure swift response to active fires while resisting transient environmental shifts.
The detector operates reliably across an input supply voltage range of 9V DC to 33V DC, making it versatile for standard initiating circuits. It draws an ultra-low standby current of only 50 µA during normal supervision, expanding loop capacity, while delivering up to 90 mA during full alarm latching.
Engineered for simple field installation, the unit supports polarity-free 2-wire zone wiring that eliminates termination errors during commissioning. The detector mounts securely onto its matching 100 mm base, supporting standard layout spacing of 5 meters between sensing points under standard ceiling conditions.
Facility managers and electrical contractors benefit from integrated remote annunciator capability, provided through an open collector output supporting up to 15 mA. Dual supervisory LEDs allow instant visual differentiation between standard polling and latched alarm states during routine facility maintenance rounds.
Designed and certified to UL standards for fire protective signaling systems, this thermal detector is suited for commercial offices, data facilities, educational institutions, healthcare centers, warehouses, and industrial production floors. It operates continuously within temperature limits from -10°C to 37.8°C and non-condensing relative humidity up to 95%.

Product Information .

Corporate Offices Worship Places Industries, Factories Hospitals, Clinics Libraries Shopping Malls, Showrooms Government Buildings, Offices Banks Airports Railways, Bus Stations Conference Rooms Restaurants Resorts Refineries Chemical Plants Defense Sectors Event Management Server Rooms Basement, Parking Areas Pharma Industries Auditorium Conference Hall Construction Sites

Control Panel Compatibility, Loop Specifications, and Integration

Conventional Fire Alarm Control Panel (FACP) Integration

The KTI07001001HTDT conventional rate-of-rise and fixed-temperature heat detector is engineered for universal electrical interfacing with standard 2-wire conventional fire alarm control panels (FACPs) and initiating device circuits (IDC). The internal detection circuitry accepts an operating voltage range spanning from 9V DC to 33V DC, accommodating standard 12V DC and 24V DC conventional panel zone loops. System designers and commissioning engineers can readily calculate circuit loop loading using the unit's steady-state standby current of 50 µA and peak alarm current limit of 90 mA.

During system power-up and panel resets, the detector exhibits a start-up initialization time of 60 seconds with a transient start-up current draw of 170 µA. For complete alarm clearance following thermal activation, the host fire alarm control panel must provide an initiating circuit voltage reset cycle that drops loop power to less than 1V DC. Panels unable to discharge residual line voltage below this 1V DC threshold will fail to unlatch the internal solid-state holding circuit.

Mounting Base and Remote Output Interfacing

The detector package includes a matching regular 100 mm mounting base (compatible with the RE-314B conventional base platform). The terminal architecture features polarity-free wiring connections across the zone loop terminals, eliminating line-inversion faults during multi-drop field terminations. In addition to primary two-wire zone monitoring, the terminal assembly provides an integrated open-collector remote indicator output rated for a maximum load current of 15 mA. This auxiliary output interfaces directly with remote response indicator LEDs and above-ceiling or closed-room mimic indicators.

System Compatibility and Electrical Interface Parameters

Interface / System Parameter	Specification / Compatibility Range	Engineering Consideration
Zone Panel Architecture	Standard 2-Wire Conventional Initiating Circuits	Interoperable with all standard conventional fire alarm panels
Loop Operating Voltage	9V DC to 33V DC	Supports nominal 12V DC and 24V DC zone supplies
Panel Reset Threshold	Less than 1V DC	Circuit voltage must drop below 1V DC to clear latched state
Normal Standby Current	50 µA @ continuous DC supply	Permits high detector density per conventional IDC zone
Start-Up Transient Current	170 µA (60 s duration)	Factor into power supply turn-on in-rush calculations
Maximum Alarm Current	90 mA (Max)	Dictates loop current-limiting resistor sizing at the FACP
Remote Output Terminal	15 mA maximum (Open Collector)	Compatible with external remote indicator displays
Wiring Configuration	Polarity-free 2-wire connection	Prevents reverse-polarity wiring faults in the field
Base Mechanical Dimension	100 mm diameter (46 mm overall height)	Direct surface ceiling mounting onto standard backboxes

Environmental and Area Placement Compatibility

Operational compatibility requires indoor environmental parameters to remain within an operating temperature window of -10°C to 37.8°C and non-condensing relative humidity levels between 0% and 95% RH. The enclosure carries an ingress protection classification of IP42. Nominal system design mandates an installation spacing of 5 meters between adjacent heat detectors. Because the internal thermal sensor triggers on both a 59°C (138°F) fixed threshold and an 11.1°C/min (20°F/min) rate-of-rise gradient (evaluated on a 5-second internal sampling cycle), avoid mounting locations subject to rapid ambient temperature shifts such as direct hot-air HVAC discharges or industrial process exhausts.

Installation, Wiring, and Commissioning Guide

Proper mechanical mounting, loop circuit design, and commissioning are critical to ensuring the rapid thermal response of this conventional Rate of Rise (ROR) and Fixed Temperature heat detector. Engineered for surface ceiling installations, the unit combines a sleek, low-profile profile with a dedicated 100 mm mounting base, facilitating streamlined integration across commercial and industrial fire alarm networks.

Base Mounting and Physical Dimensions

The detector mounts to standard ceiling surfaces using a dedicated 100 mm diameter conventional base. With the detector head secured onto the base, the assembly has an overall height of 46 mm and a total mechanical weight of 130 grams (0.13 kg). The low-profile housing is built to an IP42 ingress protection rating, making it suitable for standard indoor ceiling environments.

Ensure that the mounting base is firmly anchored to the ceiling or conduit backbox before twisting the detector head into position. The physical assembly allows for easy servicing and head replacement without detaching field wiring from the terminal base.

Loop Wiring and Circuit Connections

This conventional heat detector features polarity-free wiring, significantly reducing field installation time and preventing circuit fault conditions caused by inverted zone lead connections. It operates across a standard 2-wire initiating device circuit (IDC) supplied by conventional fire alarm control panels delivering between 9V DC and 33V DC.

Operating Loop Voltage: 9V DC to 33V DC nominal zone input.
Polarity Freedom: Line polarity can be connected to either zone terminal without impairing circuit operation.
Remote Indicator Output: Includes an integrated open collector remote output rated for 15 mA maximum, allowing direct wiring to external remote response indicators where remote status annunciation is required.
Supervisory Monitoring: End-of-line (EOL) monitoring resistors must be installed in accordance with the control panel manufacturer's design criteria at the final base on the initiating loop.

Spacing and Environmental Siting Guidelines

For open-area coverage, the nominal recommended installation spacing between detectors is 5 meters. Site placement must strictly align with the operational and thermal parameters of the unit to eliminate nuisance trips while maintaining code-compliant life safety coverage:

Fixed Temperature Threshold: The device activates a latched fire alarm when ambient ceiling temperatures reach 59°C (138°F).
Rate of Rise Threshold: The unit triggers an alarm condition when temperatures increase at a rate exceeding 11.1°C per minute (20°F per minute). Do not locate detectors in direct proximity to forced-air HVAC discharge vents, manufacturing ovens, or industrial exhaust ducts where rapid non-fire temperature changes occur.
Ambient Operating Limits: Ensure ambient room temperatures remain within the certified range of -10°C to 37.8°C (storage ratings span -10°C to 60°C). Relative humidity must be maintained between 0% and 95% RH (non-condensing).

Power-Up Sequence and Panel Commissioning

Upon initial loop energization from the fire alarm control panel, the detector undergoes an internal stabilization and start-up sequence lasting 60 seconds, during which the circuit draws a start-up current of 170 µA. Once initialized, the detector enters quiescent mode, drawing a nominal standby current of 50 µA while operating on an internal sensor sampling cycle time of 5 seconds.

When an alarm is triggered, the unit latches into the active state, increasing current draw up to a maximum alarm current of 90 mA and illuminating the dual 360-degree visual LEDs for omnidirectional status visibility. To reset the latched detector following an alarm actuation or field test, the fire alarm control panel initiating circuit must drop loop voltage below the required reset threshold of less than 1V DC.

Key Installation & Electrical Parameters

Parameter	Specification
Input Voltage Range	9V DC to 33V DC
Standby Current	50 µA
Start-up Current / Time	170 µA / 60 seconds
Maximum Alarm Current	90 mA
Reset Voltage Threshold	Less than 1V DC
Remote Output Rating	15 mA max (open collector)
Installation Spacing	5 meters
Mechanical Dimensions	100 mm diameter × 46 mm height (with base)
Assembly Weight	130 g (with base)
Enclosure Ingress Rating	IP42
Thermal Alarm Thresholds	59°C (Fixed) / 11.1°C per min (Rate of Rise)

Maintenance, Testing, and Electrical Diagnostics

Routine Visual Inspection and LED Monitoring

Regular visual inspection of the conventional heat detector ensures continued operational readiness within fire signaling systems. Field maintenance personnel should examine the low-profile housing for physical damage, unseated alignment, or foreign contamination that could compromise the IP42 enclosure rating. The detector features dual LEDs providing 360-degree visual indication. During normal supervisory polling, the internal sensor operates on a 5-second cycle time. During regular inspection rounds, confirm that the dual LEDs exhibit normal supervisory operation and do not indicate a latched alarm state unless a thermal event has occurred.

Functional Testing and Thermal Verification

Periodic operational testing should be conducted using calibrated testing equipment capable of generating controlled convective heat flows without exceeding physical exposure boundaries. The dual-action sensing element incorporates both rate-of-rise and fixed-temperature thermistor response logic:

Rate of Rise (ROR) Verification: The thermal mechanism activates when ambient temperature increases at a rate equal to or exceeding 11.1°C per minute (20°F per minute). Controlled heat application must test response dynamics without applying direct high-heat open flames that could distort the 46 mm by 100 mm housing assembly.
Fixed Temperature Verification: Secondary static threshold activation occurs at 59°C (138°F). Heat exposure should be controlled within calibrated testing shrouds to confirm that the detector latches upon reaching this specific thermal setpoint.
Initialization Period: Following initial system commissioning, routine line testing, or detector head re-insertion into the regular 100 mm base, observe the 60-second start-up initialization time where current consumption reaches 170 µA before settling into standard standby monitoring.

Electrical Diagnostics and Reset Sequence

When an alarm is triggered, the unit latches into an active alarm state, increasing its current draw up to 90 mA maximum and driving any connected remote indicator output (rated at up to 15 mA maximum via an open collector circuit). To verify control panel functionality during routine maintenance, perform an electrical loop reset. The detector requires the initiating zone voltage to be momentarily dropped below 1V DC. If an initiating circuit retains a residual loop voltage of 1V DC or greater, the detector will fail to unlatch and will remain in continuous alarm.

Operational Metric	Maintenance Benchmark
Operating Voltage Range	9V DC to 33V DC
Reset Voltage Level	Less than 1V DC
Supervisory Standby Current	50 µA
Start-up Initialization Current	170 µA (60 seconds duration)
Full Alarm Current Draw	90 mA (Maximum)
Remote Output Capacity	15 mA maximum (Open Collector)
Sensor Sampling Cycle Time	5 Seconds
Ingress Protection Class	IP42

Environmental Controls and Base Servicing

Premature failures and nuisance alarms during routine plant operation are frequently traced to installation environment drift. Verify that operating ambient conditions remain strictly between -10°C and 37.8°C, with non-condensing relative humidity within the 0% to 95% RH specification. Facilities that store reserve inventory must ensure warehouse temperatures stay within -10°C to 60°C. If equipment alterations occur within the facility, confirm that the 5-meter installation spacing is maintained and that localized heat sources (such as process exhausts, radiant heaters, or forced-air HVAC discharge vents) do not introduce sudden thermal transients exceeding 11.1°C per minute across the detector head.

When detaching the 130-gram detector head from its regular 100 mm base for circuit isolation or cleaning, inspect the terminal connections for loose screw terminations. The integrated polarity-free wiring design minimizes re-connection errors during base replacement; however, technicians must ensure that base contacts remain clean, corrosion-free, and firmly seated to maintain a reliable circuit across the entire conventional zone loop.

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