Thurning Instruments Ltd is currently designing instrumentation for special diagnostic techniques. The equipment will make measurements and inject stimuli via catheter electrodes. It must meet all of the standards and requirement for invasive medical equipment, including resistance to defibrillation pulses. Thurning is responsible for the analogue design and patient protective measures in this collaborative project.

This is a modular system, based on 16-channel input cards. It can be expanded to 512 channels. The system is designed to report a full data set at 1-millisecond intervals, so it connects to a PC using a fast parallel interface. The resolution is 16 bits, using a delta-sigma AD converter; the resolution of the measurement may be improved by integrating readings. The inputs may be configured for a range of signals.

For use in protecting retail stock, using micropower techniques to ensure reliability and long battery life. The alarms are designed for medium volume production, so a careful compromise has been made between performance and manufacturing cost.

Diagnosing and solving noise and stability problems in high performance amplifiers. For example, a client had a problem with a cryogenically cooled amplifier that was found to be oscillating at several GHz.

An electrical impedance antenna system for deep ocean measurements, for use at a depth of 6000 meters. This was done in conjunction with a major UK engineering contractor, and the National Institute of Oceanographic Sciences. Our measurement technique for this equipment has been patented world-wide.

A high dose rate X-ray and gamma-ray densitometers for two-phase flow measurement in the fields of Solar Energy and Nuclear Safety Research, at temperatures to 350º C and pressures to 160 bar.

An ultra low noise preamplifier system for fluid flow measurement using thermocouples and based on cross-correlation of the temperature noise signals associated with turbulence in the flow.

X-ray and gamma ray based radiometric gauging heads for hot (to 1100ºC) and cold steel rolling mills. This equipment is capable of gauging accuracies of better than 0.1% (± 2s ) at a radiation transmission of only 1%.

Gamma-ray density gauging head, which operates at -30ºC, for locating voids in polar ice core samples.

An Ex-p certified (German P.T.B.) twin beam gamma densitometer for two-phase flow density measurement in explosive environments, for the Health and Safety Executive's Explosion and Fires Research Group.