Oil temperature middles oil rod encoder

Hi! Ask the experts a question: I would like to install an oil temperature indicator in smoke glass optics (www.gts2.de), but here a beaker is supplied for screwing up somewhere – but I would like to use an oil rod encoder (www.sandtler.de) for easy mounting. Do you think the beaver is fun with the smoke glass indicator? Does anyone generally have experience with oil rod encoders (accuracy, problems,…)? That would be a pleasant solution if it is fun… Ask for tips! Thank you, MfG