Hi!
Here are few pro and contemporary looking design concepts (#39, #40, #41, #42, #43 and #44). I've tried to avoid playful looking style and obvious, overused lab equipment elements,...instead focused on tick and drop elements combined together into unique design. Hope you'll like some of these, and feel free to suggest improvements. In the mean time I'll try to develop few more designs. Thank you!
Regards,
Bojan