Thomas Research HID 50-1500W Auxiliary Quartz Controller ESP-125
The Thomas Research ESP-125 is a quartz restrike controller designed to enhance the reliability and performance of High-Intensity Discharge (HID) lighting systems. This device automatically activates an auxiliary quartz lamp when the primary HID lamp is extinguished, ensuring continuous illumination in critical applications.
Key Features
- Wide Compatibility: Suitable for use with High-Pressure Sodium (HPS) or Metal Halide (MH) magnetic ballasts featuring a 120V tap or input.
- Broad Operating Range: Supports HID circuits ranging from 39 to 1500 watts and auxiliary lamps up to 500 watts.
- Intelligent Sensing: Utilizes a current-sensing circuit to monitor the HID lamp’s status, allowing compatibility with various lamp and ballast configurations.
- Non-Arcing Switches: Equipped with non-arcing switches, making it suitable for use in Class 1, Division II vapor-tight fixtures.
- Emergency Power Integration: Can be directly connected to emergency generator power, ensuring lighting continuity during power outages.
- Durable Construction: Housed in a high-temperature, flameproof plastic enclosure with a maximum surface temperature rating of 105ºC.
Specifications
- Voltage: 120V
- Frequency: 50/60 Hz
- Dimensions: 1.5” x 2.25” x 0.75”
- Threaded Nipple: ½”-NPS
- Lead Length: 12” leads, stripped 0.63”
The ESP-125 is engineered to provide seamless auxiliary lighting control, ensuring that environments remain illuminated even when primary HID lamps fail. Its compact design and straightforward wiring make it an ideal solution for enhancing the reliability of HID lighting systems.













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