1. CONVENTIONAL DEVICES
System Sensor 1151EIS Features
Ionization/ 5451EIS Thermal • BASEEFA approved for use in EEx ia IIC T5
hazardous locations
Intrinsically Safe Detectors
• FM approved for use in Class I, Div. 1, Groups A,
B, C, D hazardous (classified) locations
• Two LEDs provide 360° visibility
• Built-in tamper-resistant feature
• SEMS screws for easy wiring (Base)
• 5451EIS is UL approved as a heat automatic fire
detector
• 1151EIS is UL approved as a smoke automatic
1151EIS Intrinsically Safe
fire detector
Ionization Detector
• Low Standby current
5451EIS Intrinsically Safe
Thermal Detector
Description
Intrinsically safe detectors are used in hazardous Model 5451EIS intrinsically safe rate-of-rise thermal
locations where explosive levels of gas or vapors detector with fixed temperature alarm set point of 60°C
are normally or potentially present. The 1151EIS and (140°F) uses a state-of-the-art thermistor sensing circuit.
5451EIS circuit power levels are limited so the potential This detector is designed to provide open area protection
to ignite an explosive atmosphere is eliminated. and is to be used with compatible control panels only.
When the temperature at the detector exceeds 60°C
Intrinsically safe detectors need to be compatible with
(140°F), it latches in alarm and remains in this condition
system control panels for ground fault detection and
until it is reset by a momentary power interruption.
proper use. Consult the appropriate listing agency for
further information about the use of intrinsically safe 1151EIS and 5451EIS are equipped with two LEDs that
products. An approved compatible barrier must also provide a local, 360° visual indication of detector status.
be used in all intrinsically safe applications and can be Remote LED annunciator capability is also included.
purchased separately. Where applicable, BASEEFA The detectors can be tested by activating the internal
or FM must approve the barrier used with the system. reed switch with a test magnet.
Intrinsically safe detectors are designed to provide
protection and be used with compatible UL listed
control panels.
Model 1151EIS ionization smoke detector uses a state-
of-the-art sensing chamber. This detector is designed to
afford open area protection and is for use with compatible
two-wire control panels only. Once the detector senses
a fire, it latches in alarm and remains in this condition
until it is reset by momentary power interruption. APPROVED
Issue 1 SECUTRON INC. Page 1 of 2
Canada 25 Interchange Way, Vaughan (Toronto), Ontario L4K 5W3 Telephone: (905) 695-3545 Fax: (905) 660-4113 • Web Page: www.secutron.com
U.S.A. 4575 Witmer Industrial Estates, Niagara Falls, NY 14305 Telephone: (888) 695-3545 Fax: (888) 660-4113 • E-mail: mail@secutron.com
Catalog Number 2026 • Not to be used for installation purposes.

2. Technical Data
Height Operating Temperature Range Latching Alarm
1151EIS 1.66" (4.2 cm) UL, FM: 32° to 120°F Reset by momentary power interruption
5451EIS 2.1" (5.2 cm) (0° to 49°C) BASEEFA Intrinsic Safety Rating
1151EIS
Diameter LPCB, BASEEFA: 14° to EEx ia IIC T5
140°F (–10° to 60°C)
4.0" (10.2 cm) FM Intrinsic Safety Rating
UL, FM: 32° to 100°F
Shipping Weight (0° to 38°C) Class I, Div. 1, Groups A, B, C, D
1151EIS 3.5 oz. (99g) 5451EIS Thermal Rating (Europe)
LPCB, BASEEFA: 32° to
5451EIS 5.3 oz. (150g) 122°F (0° to 50°C) Fixed set point: 140°F (60°C)
Input Voltage Operating Humidity Range EN54-5, Grade 1
15–28 VDC 10% to 93% Relative Humidity Thermal Rating (UL)
Standby Current (non-condensing) Fixed set point: 135°F (57°C)
Barrier Dependent Spacing (UL) Listed Air Velocity (1151EIS)
50 ft. on center on smooth ceilings 0–500 feet per minute (2.5 m/s)
Ordering Information
Model Description
1151EIS Intrinsically Safe Low Profile Plug-In Ionization Smoke Detector
B401 Flangeless base
B110LP Flanged base
MOD400 Detector metering adapter module; use with most analog or digital multi-meters
RA400Z Remote LED Annunciator
M02 Test Magnet
Page 2 of 2 SECUTRON INC. Issue 1
Catalog Number 2026 • Not to be used for installation purposes.
Secutron reserves the right to make changes at any time without notice in prices, colors, materials, components, equipment, specifications and models and also to discontinue models.
Modul-R® is a trademark of Secutron Inc.
ISO 9001:2000
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