Hirst Spore trap electronic clock. replacement clock that is totally interchangeable with the Burkard Manufacturing 7 day clock and the Burkard Scientific 7 day clock. this is powered by 4 AAA batteries. the clock comes in 2 versions these are widely being used to over come the reliability issues with the standard clockwork clocks.

Version 1:

Hirst Multi Rotation Speed clock has 3 selectable rotation speeds. 24 Hour, standard 7 Day and 28 Day. Estimated battery life, based on Duracell alkaline @ 20°C, 150 x 1 day runs, 22 x 7 day runs, 6 x 28 day runs

Version 2:

Hirst 7 Day Only Clock. replacement clock that is totally interchangeable with the Burkard Manufacturing 7 day clock and the Burkard Scientific 7 day clock. this is powered by 4 AAA batteries. this clock has 1 rotation speeds. standard 7 Day Continuous. Estimated battery life, based on Duracell alkaline @ 20°C, 22 x 7 day runs,

Fully Stainless Steel Construction

Batteries 4 x AAA

Estimated battery life, based on Duracell alkaline @ 20°C, 150 x 1 day runs, 22 x 7 day runs, 6 x 28 day runs

Interchangeable with 7 Hirst Spore Traps

Hirst Electronic 7 Day Time clock Instructions

Hirst Electronic Multi Time clock Instructions