(RED1-ST)

The Standard RED1

Our flagship explosion-proof flame detector built for locations where reliability is non-negotiable.

The Go-To Workhorse for Challenging Environments

The RED1-ST is Sierra’s flagship detector and the most widely deployed model in the RED1 family. The RED1-ST combines explosion-proof construction with multi-spectrum sensing to detect a broad range of hydrocarbon and specialty fuel fires while filtering common false alarm sources like solar radiation and welding arcs.

Specification Sheet Installation Manual

Key Features

Multi-Spectrum Sensing: UV, IR, and visible-light sensors with advanced flame signature analysis.
120° Conical FOV: Wide field of view reduces the number of units needed per coverage zone.
Optical Self-Test: Continuous automated verification of sensor and window integrity. Fault reported via relay output and LEDs.
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 That the RED1-ST Fits Your Project

Sierra’s engineering team can help verify sensitivity settings, relay configuration, and approval alignment before submittals or ordering.

Let’s Talk Specs

The Engineering Behind the RED1-ST

The RED1-ST uses a proprietary detection algorithm that cross-correlates spectral intensity, frequency distribution, and rate-of-change across all three sensor bands.

This allows the detector to differentiate between the unique flicker signatures of hydrocarbon flames and common industrial interference, maintaining near-zero false alarm rates without sacrificing response speed.

During FM testing, the RED1-ST achieved a 2.75-second average response to a 1 sq. ft. Heptane fire at 80 feet on axis. Four field-selectable sensitivity settings (20, 40, 60, and 80 ft) allow installers to tune detection range to match site conditions.

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.

Unlike competitors that rely on dual-spectrum sensing, the RED1-ST’s triple-spectrum architecture provides an additional layer of false-alarm rejection: critical in environments with welding, hot exhaust, or sunlight exposure.