A pair of electrical conductors of dissimilar materials, joined at one end (the measuring or hot junction), which produces an electromotive force (e.m.f.) due to the Seebeck effect in a circuit formed by connecting the other ends of the dissimilar materials used (the reference or cold junction) to a device for measuring e.m.f. Def. acc. to IEC 902 1987.

A pilot switch whose function is controlled by variations of temperature and whose contacts make or break automatically a load circuit when the temperature of the ambient space in which its sensing element placed or the temperature of the surface on which it is fixed reaches a predetermined value.

A pilot switch whose function is controlled by variations of temperature and whose contacts make or break automatically a load circuit when the temperature of the ambient space in which its sensing element placed or the temperature of the surface on which it is fixed reaches a predetermined value.

A physical object that is a pressure-tight receptacle adapted to receive a temperature sensing element, provided with external threads or other means for pressure-tight attachment to a vessel or pipe.

A physical object that is a pressure-tight receptacle adapted to receive a temperature sensing element, provided with external threads or other means for pressure-tight attachment to a vessel or pipe.

A semiconductor device that is a three-terminal semiconductor rectifier made up of four layers, p-n-p-n, so that when the fourth is positive with respect to the first, a voltage pulse applied to the third layer initiates a flow of current through the device which continues as long as it is greater than some minimum value.

A semiconductor device that is a three-terminal semiconductor rectifier made up of four layers, p-n-p-n, so that when the fourth is positive with respect to the first, a voltage pulse applied to the third layer initiates a flow of current through the device which continues as long as it is greater than some minimum value.

A timepiece that measures a time interval and signals its end; a time-switch.

A timepiece that measures a time interval and signals its end; a time-switch.

A device that is a mechanical implement for working upon something, as by cutting, striking, rubbing or other processes, in any manual art or industry; usually, one held in and operated by the hand (or fixed in position, as in a lath), but also including certain simple machines, as the lathe; sometimes extended to simple instruments of other kinds.

A device that is a mechanical implement for working upon something, as by cutting, striking, rubbing or other processes, in any manual art or industry; usually, one held in and operated by the hand (or fixed in position, as in a lath), but also including certain simple machines, as the lathe; sometimes extended to simple instruments of other kinds.

A fluid coupling intended to allow a smooth start of a driven equipment and then keeping a nearly constant speed.

A fluid coupling intended to allow a smooth start of a driven equipment and then keeping a nearly constant speed.

A machine designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a trailer or machinery

A machine designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a trailer or machinery

Is a vehicle which is nonautomotive and is designed to be hauled by road.

Is a vehicle which is nonautomotive and is designed to be hauled by road.

A transformer that, by electromagnetic induction, transforms a system of alternating voltage and current into another system of voltage and current usually of different values and at the same frequency for the purpose of transmitting electrical power.

A transformer that, by electromagnetic induction, transforms a system of alternating voltage and current into another system of voltage and current usually of different values and at the same frequency for the purpose of transmitting electrical power.

A physical object that is an element that receives a process variable signal from a sensor and converts it into an output signal.

A physical object that is an element that receives a process variable signal from a sensor and converts it into an output signal.