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Product Mockup 1
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Red1 Breakdown
Red1 Breakdown
Red1 Internals
Red1 Internals
Red1 In White
Red1 In White

(RED1-E)

The Enhanced RED1

Advanced flexibility built on the proven RED1 explosion-proof platform.

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Expanded Capability for Complex Systems

The RED1-E adds Verify Fire and Auxiliary Fault relay outputs to the standard RED1 platform. Detection performance, optical self-test, and hazardous area approvals remain identical to the RED1-ST.

Available in four factory-configured relay combinations (E1–E4), the RED1-E is selected when projects require verified fire confirmation as a separate output, auxiliary fault signaling for UV sensor integrity monitoring, expanded integration with multi-zone or tiered alarm architectures, or a path toward future system expansion.

Specification Sheet Installation Manual

Key Features

  • Verify Fire Relay: Adds a field-adjustable level of certainty before declaring a verified fire. Seven configurable levels.

  • Auxiliary Fault Relay: Activates when UV sensor integrity is compromised, providing a separate indication.

  • Four Factory Configurations: E1 (N.O. Verify / N.C. Aux), E2 (N.C. Verify / N.O. Aux), E3 (N.O. / N.O.), E4 (N.C. / N.C.).

  • NEMA 4X Explosion-Proof Housing: Class I Div 1 & 2 Groups B, C, D · Class II Div 1 & 2 Groups E, F, G · Class III.

Confirm RED1-E Alignment With Your Project

If your project requires expanded relay functionality or advanced system integration, Sierra can help confirm the right E-model configuration for your control architecture.

Let’s Talk Specs

The Engineering Behind the RED1-E

The RED1-E uses the same proprietary multi-spectrum detection algorithm as the rest of the RED1 family, cross-correlating UV, IR, and Visible sensor data to differentiate hydrocarbon flames from industrial interference.

What the Enhanced models add is a second layer of decision-making. The Verify Fire system evaluates the degree of certainty of a flame signature over time after the initial Fire Mode is triggered.

When certainty exceeds the user-configured level, the detector enters Verified Fire Mode and energizes the Verify Fire Relay as a separate output. The Auxiliary Fault Relay independently monitors UV sensor integrity: flagging contamination or degradation before it impacts detection.

What Sets Sierra Apart

Sierra Safety Technology has manufactured flame detection equipment for nearly 40 years with zero product recalls and zero failures resulting in loss of life. RED1 units installed over 30 years ago remain in active service today.

The RED1-E reflects an engineering-first approach: expand system capability without adding unnecessary complexity.

Specialized Applications Across Sectors

Oil & Gas

Refineries, offshore platforms, and fuel handling operations requiring FM-approved explosion-proof detection in Class I hazardous locations.

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Chemical

Petrochemical processing plants with volatile organic compounds, high-temperature reactions, and strict compliance requirements.

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Semiconductor

Fabrication and process areas where rapid detection of specialty chemical fires supports facility-wide safety systems.

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Technical Specifications Sheet

View available configurations, full product specifications, dimensions, and sensitivity ranges.

Download the Spec Sheet

Frequently Asked Questions

The RED1-E adds two additional relays (Verify Fire and Auxiliary Fault) via the J3 connector. Detection technology, sensitivity settings, field of view, optical self-test, and hazardous area approvals are identical to the RED1-ST.

Each configuration sets the factory default for the Verify Fire and Auxiliary Fault relays: E1 (N.O. Verify / N.C. Aux), E2 (N.C. Verify / N.O. Aux), E3 (N.O. / N.O.), E4 (N.C. / N.C.). The Fire and Fault relays on all models can still be connected as either N.O. or N.C. in the field.

After the detector enters Fire Mode, the Verify Fire system evaluates flame signature certainty over time. Seven configurable levels are available, each adding approximately 5 seconds of delay. When certainty exceeds the set level, the Verify Fire Relay energizes as a separate output.

It activates when UV sensor integrity is compromised — typically from lens contamination that absorbs UV energy. This provides a dedicated fault indication separate from the standard Fault Relay.

Operating: −40°C to +85°C. Storage: −55°C to +110°C.

Yes. The Fire Relay (J2), Verify Fire, and Auxiliary Fault (J3) connectors all include dual terminals to support daisy-chaining multiple RED1 units.

More Products

Standard

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Non-Self Test

Handheld Test Source

Enhanced

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