Honeywell E3SAH Gas Detector

The Honeywell E3SAH is a heavy-duty, 120Vac standalone gas detector engineered for commercial and industrial environments such as mechanical rooms and parking garages. This wall-mounted unit features a 4-20mA communication output and dual DPDT relays, allowing for seamless integration into existing HVAC BAS systems or direct control of exhaust fans and louvers. The E3SAH serves as the direct cross-reference for the 1309A0043 and E3SARH models, ensuring easy field replacement. Designed for versatility, this E3 Point gas monitor utilizes smart sensor technology with an on-board audible alarm, though the specific toxic or combustible sensor cartridge must be purchased separately. Its rugged polycarbonate housing provides high resistance to dust and moisture, maintaining signal integrity in demanding plant conditions. This unit simplifies installation by eliminating the need for a separate controller, making it a reliable solution for gas detection and ventilation control.

• Plug-and-Play Integration: Direct 120Vac power input eliminates the need for external step-down transformers in high-voltage applications.
• Advanced Output Options: Features two 5A DPDT relays and a linear 4-20mA signal for simultaneous local alarm triggering and remote monitoring.
• Field Serviceable: The modular design allows for factory-calibrated sensor cartridge swaps, reducing downtime during routine maintenance.
• Direct Retrofit: Proven compatibility for replacing legacy Honeywell 301-style and 1309A0043 gas detection hardware.
• Integrated Safety: High-decibel audible alarm provides immediate local notification of leak events independent of the building management system.

Does the E3SAH come with a pre-installed sensor?
No, the sensor cartridge is sold separately. You must select the specific gas cartridge (CO, NO2, H2, CH4, etc.) required for your application to complete the assembly.

Can this unit be used for both toxic and combustible gases?
Yes, the E3SAH transmitter is compatible with Honeywell’s full range of toxic and combustible smart sensors, though it monitors one specific gas type based on the installed cartridge.

How do I wire the DPDT relays for fan control?
The DPDT relays provide dry contacts that can be wired normally open or normally closed. Typically, they are used to interlock with a motor starter or VFD to initiate emergency ventilation when gas concentrations reach the programmed setpoint.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.