Trevor Moseley, the University of Sheffield's radiation protection advisor, has been using Rad Monitors since they were introduced to the UK market by Lablogic Systems six years ago.
Anyone with hands-on responsibility for radiation protection cannot function without a radiation monitor, so they need to be certain that it will perform reliably, day after day.
'They're easy to use and recalibrate, robustly constructed and straightforward to repair,' said Moseley.
'They cost less to buy but are just as reliable as other makes.
'Nonetheless, you will always have to replace the occasional broken tube, so after-sales service is an important consideration.
'Lablogic carries a good stock of spares and gives excellent customer service, so you will never be without a Rad Monitor for long,' he added.
Alongside the fast turnaround service is the company's instrument testing programme, which is carried out by a full-time specialist.
All monitors are thoroughly checked before first delivery and again after repair, and an annual testing service is also available.
The Rad Monitor range offers three Geiger Muller-based models for 14C, 32P, 33P and 35S.
The GM1 is a general-purpose monitor, with a 28.5mm (1.125in) tube detector, a 1.5-2.0mg/cm2 window thickness and a thin screen that protects the end window.
The GM2 has a larger end window (45mm/1.75in), which is suitable for detecting soft beta emitters on hands, clothing and benchtops.
The GM2-P has a pancake probe and a large diameter GM tube for monitoring surfaces.
Also available is the sodium iodide crystal-based SD10, which has a high-sensitivity scintillation probe for detecting Gamma emitters such as 125I and 99Te.