Vintage Unitronics Essar Integrator Model 26R Darkroom Timer - Serial #303 - Rare Photography Equipment

For sale is a vintage Unitronics Essar Integrator Model 26R, a classic piece of darkroom equipment perfect for analog photography enthusiasts, collectors, or vintage tech aficionados. Manufactured by Unitronics, Inc. in St. Louis, Missouri, this device was designed to precisely control exposure times for photographic printing, making it an essential tool in traditional film photography.

Key Features:

• Model: Essar Integrator Model 26R, Serial #303

• Power: 105-125V, 50/60 cycle AC

• Controls: Large exposure dial, switches for Power, Operate, Focus, Expose, Start, and Signal, plus a range selector (200/600)

• Ports: Includes connections for Remote Control, Flash Lamp, Shutter, Arc Contactor, and Photo Cell

• Additional Features: Cancel button, 1 AMP fuse holder, and indicator lights

Condition:This unit shows signs of use with visible wear, including some dirt, scratches, and discoloration on the panel (see photos). All knobs, switches, and ports appear intact, but the device has not been tested for functionality. It’s being sold as-is, ideal for restoration, display, or use in a working darkroom setup if operational. The serial number (303) may indicate an early production run, adding to its collectible value.

Historical Significance:The Essar Integrator is a rare find from Unitronics, a lesser-known but respected name in mid-20th-century photography equipment. Devices like this were crucial for controlling enlargers and exposure in darkrooms, and they’re now sought after by collectors and film photographers embracing analog techniques.