What Is the Det-Tronics PointWatch Eclipse® PIRECL?

What Is the Det-Tronics PointWatch Eclipse® PIRECL Infrared Hydrocarbon Gas Detector?

When a gas leak occurs in a compressor room, on an offshore production platform, or inside a petrochemical processing unit, the margin between early detection and catastrophe is measured in seconds. The Det-Tronics PointWatch Eclipse® Model PIRECL is the infrared hydrocarbon gas detector engineered specifically for those seconds — delivering continuous, fixed monitoring of flammable hydrocarbon gases from 0 to 100% Lower Flammable Limit (LFL) with no sensor poisoning risk and no routine calibration required.

Part number 014048-245-LG identifies a specific factory configuration of this infrared hydrocarbon gas detector: Fast Response (FR) mode, hydrophobic weather protection baffle, and light gray housing. This is the variant most frequently specified on projects in the oil & gas, offshore, and industrial sectors where speed of response and environmental robustness are non-negotiable. Manufactured by Det-Tronics — a globally recognized leader in infrared gas detection and fire safety — the PIRECL is performance-certified to methane, propane, ethylene, and butane, and is capable of detecting hundreds of additional flammable hydrocarbon vapors.

Why an Infrared Hydrocarbon Gas Detector Outperforms Catalytic Bead Technology

Not all gas detectors are created equal. Traditional electrochemical and catalytic bead sensors have a fundamental vulnerability: they depend on a chemical reaction to detect gas, which means they can be permanently disabled by sensor poisons such as silicone compounds, hydrogen sulfide (H₂S), or tetraethyl lead. Worse, they can fail silently at high gas concentrations — the exact moment reliable detection is most critical. Understanding how fire and gas detection systems work makes clear why the infrared hydrocarbon gas detector has become the standard technology for high-consequence industrial environments.

The PIRECL uses Non-Dispersive Infrared (NDIR) technology with heated sapphire optics to measure the absorption of hydrocarbon gas molecules at specific IR wavelengths. Because this infrared hydrocarbon gas detector operates optically rather than chemically, it is entirely immune to the failure modes that affect catalytic bead sensors. Key advantages include:

In industries where a single undetected gas release can result in catastrophic loss of life or assets — oil & gas, offshore platforms, petrochemical refineries, data centers, and LNG terminals — the infrared hydrocarbon gas detector is the accepted best practice and increasingly the regulatory expectation.

Det-Tronics 014048-245-LG: Key Specifications at a Glance

The table below summarizes the core technical parameters of this infrared hydrocarbon gas detector configuration. All data is sourced from the official Det-Tronics specification sheet 90-1138.

The 014048-245-LG Configuration: Fast Response + Hydrophobic Protection

The PIRECL platform offers multiple configuration variants. The 014048-245-LG infrared hydrocarbon gas detector is defined by two features that together address the two most common specification challenges in outdoor and offshore gas detection: response speed and weather resilience.

1. Fast Response (FR) Mode

In environments where the speed of alarm actuation directly determines whether an emergency shutdown (ESD) can be initiated before a gas cloud reaches ignition energy, response time is not a specification detail — it is a life safety parameter. Every second of detection delay is a second during which a flammable mixture continues to grow. The FR variant of this infrared hydrocarbon gas detector achieves:

Testing based on EN 60079-29-1 with methane applied. FR values based on 50% LFL; STD values based on 100% LFL.

To put these numbers in context: a Standard Response PIRECL takes 4.5 seconds to reach 50% alarm threshold under the same conditions. The Fast Response infrared hydrocarbon gas detector does it in 1.0 second — more than four times faster. In compressor rooms, wellheads, and open offshore deck areas where gas cloud formation can be rapid, this difference is operationally critical.

2. Hydrophobic Weather Protection Baffle

Outdoor and offshore environments introduce a challenge that indoor gas detectors never face: water ingress into the optical path. Rain, condensation, salt spray, and high-pressure wash-down procedures can all obscure a detector’s optics, triggering nuisance faults or masking genuine gas alarm conditions. The tethered weather protection baffle on the 014048-245-LG incorporates a hydrophobic filter that repels water while allowing gas molecules to diffuse freely into the sensor path. Benefits include:

• Significantly reduced nuisance alarms in wet, coastal, and offshore environments
• Maintained optical clarity of the sapphire lens under sustained rain or wash-down conditions
• Easy twist-lock removal for field inspection without tools

The heated sapphire optics work in combination with the hydrophobic baffle to deliver long-term performance in environments with sustained high humidity — tested to 0–99% RH by Det-Tronics; 5–95% RH per FM/CSA/DEMKO standards.

Where the PIRECL Infrared Hydrocarbon Gas Detector Is Specified

The combination of SIL 2 integrity, global certifications, and Fast Response performance makes this infrared hydrocarbon gas detector the specification choice across the full range of hydrocarbon-processing environments. Below are the primary verticals where Blue BMS supplies and supports this model.

For applications requiring an infrared hydrocarbon gas detector across large industrial facilities, the PIRECL integrates directly into multi-loop fire and gas systems via 4–20 mA or Modbus. For flame detection in the same hazardous areas, Blue BMS also supplies the complementary Det-Tronics X3301 Multispectrum IR Flame Detector. You can also compare similar fixed-point solutions in the AutroPoint HC200 infrared hydrocarbon gas detector from Autronica.

Communication and Integration Capabilities

A gas detector that cannot integrate cleanly into the plant’s safety architecture creates its own risk. The PIRECL was designed for maximum compatibility — supporting both analog legacy systems and modern digital safety networks through a single device:

• 4–20 mA (isolated/non-isolated): Universal analog output compatible with virtually all control systems and fire & gas controllers
• HART Protocol: Enables remote configuration, calibration, and diagnostics over the analog loop without interrupting the process measurement
• RS-485 / Modbus RTU: Supports digital multi-drop networks for integration into DCS, ESD, and fire & gas systems
• ASCII Protocol: Available for custom integration requirements
• Optional Intrinsically Safe HART Port: For IS barriers and EX ia-rated systems

An optional relay output board adds two programmable alarm relays (Low Alarm, High Alarm) and one fault relay, enabling the PIRECL to directly drive field devices such as horns, beacons, and solenoid valves without the need for an intermediate controller — reducing hardware count and potential failure points in the field.

Alarm Configuration and LED Status Indicators

The PIRECL supports user-configurable alarm setpoints programmable via HART, Modbus, or the optional hand-held HART communicator. The built-in tri-color LED provides immediate local visual status — eliminating the need for an external display module in most standard installations:

Global Certifications: Ready for Every Major Market

Specifying an infrared hydrocarbon gas detector for a global project means navigating different hazardous area classification systems, national safety standards, and regional approval bodies. The PIRECL 014048-245-LG was designed to eliminate this friction — holding one of the broadest certification portfolios available in its category:

PIRECL vs. Catalytic Bead: Why the Infrared Hydrocarbon Gas Detector Wins

When evaluating gas detection technology for oil & gas and offshore projects, the choice between an NDIR infrared hydrocarbon gas detector and a catalytic bead sensor is rarely a cost question — it is a reliability and lifecycle question. The table below makes the comparison concrete, showing exactly why the PIRECL outperforms traditional technology across every critical dimension. For a broader discussion of detection technologies in hazardous areas, see our related guide.

Installation and Wiring Overview

The PIRECL’s design reflects a consistent philosophy: reduce the number of external components required in the hazardous area. The integral wiring compartment eliminates external junction boxes. The built-in relay package eliminates an external relay module. The tri-color LED eliminates an external display. Each element removed from the field installation is a potential failure point eliminated and a maintenance task removed from the plant schedule.

• Wiring terminals: Up to 14 AWG (UL/CSA) or 2.5 mm² (DIN/VDE)
• Conduit entries: Two entries, 3/4-inch NPT or 25 mm
• Power supply: 24 Vdc nominal (18–32 Vdc), 4.0 W nominal
• Conduit seal: Not required for FM/CSA-certified installations

For remote calibration and configuration without entering the hazardous area, the optional FlexVu® Universal Display (UD10, UD20, or UD30) provides explosion-proof remote access — particularly valuable in restricted access zones or where entry procedures are time-intensive.

Frequently Asked Questions

Summary: Why the PIRECL 014048-245-LG Is the Infrared Hydrocarbon Gas Detector of Choice

The Det-Tronics PointWatch Eclipse® PIRECL 014048-245-LG — the infrared hydrocarbon gas detector of choice for safety engineers, instrumentation specifiers, and procurement teams in high-consequence applications — brings together a unique combination of capabilities:

Specifications subject to change without notice. Always refer to the official Det-Tronics specification sheet (90-1138) for the most current technical data. All certifications should be verified against applicable project-specific hazardous area classification requirements prior to procurement.