Abstract: A distance transmitter for industrial process control systems is provided. The distance transmitter has a laser emitter that outputs laser pulses that strike a target. The laser pulses are reflected back by the target and are received by a light detector. The distance of the target from the sensor is determined by the time it takes for the laser pulses to return to the light detector. The distance transmitter may be mounted to an industrial structure with a flange. The laser emitter and light detector may output and receive laser light through an opening in the flange.

Abstract: A fluid flow control system has a heating device for heating a fluid and a first flow path for providing the heated fluid from the heating device to a use region. A heat exchanger has a supply path that received fluid from a fluid supply, and an outlet path that receives fluid from the use region, whereby the fluid in the supply path is pre-heated by the fluid in the outlet path. A second flow path provides pre-heated fluid from the supply path of the heat exchanger to the heating device. Modulating devices control fluid flow through the outlet path along the supply path. A flow control device controls the modulating devices such that the fluid flow rates in the fluid supply path and outlet path of the heat exchanger are balanced, so as to be substantially the same.

Abstract: A heat exchanger device (1) such as for use in recovering heat from shower waste water includes a casing base (2) and lid (3) forming an enclosure containing a first fluid conduit and a second fluid conduit (5), the second conduit being for fresh water supply and located in the first conduit, the second conduit having conduit sections in a serpentine path through the first conduit, the first and second conduits being arranged generally for counter-flow heat exchange with the second conduit having elongate sections configured generally transverse to a flow direction through the first conduit, the first conduit having baffles at an inlet and an outlet thereof for keeping the second conduit submerged in the first conduit, the device being provided with a foot or bodyweight operated actuation valve for actuating fresh water supply through the first conduit.

Abstract: A heat exchanger for a sanitary shower or the like includes a primary flow conduit, and secondary flow conduit sections, each conduit section having a substantially flat wall spaced from and aligned with an adjacent surface of the primary conduit so as to avoid accumulation of dirt. The secondary conduits may have internal walls and a mesh may be provided for spacing conduit surfaces.

Abstract: A fluid flow control system has a heating device for heating a fluid and a first flow path for providing the heated fluid from the heating device to a use region. A heat exchanger has a supply path that received fluid from a fluid supply, and an outlet path that receives fluid from the use region, whereby the fluid in the supply path is pre-heated by the fluid in the outlet path. A second flow path provides pre-heated fluid from the supply path of the heat exchanger to the heating device. Modulating devices control fluid flow through the outlet path along the supply path. A flow control device controls the modulating devices such that the fluid flow rates in the fluid supply path and outlet path of the heat exchanger are balanced, so as to be substantially the same.

Abstract: A heat exchanger device (1) such as for use in recovering heat from shower waste water includes a casing base (2) and lid (3) forming an enclosure containing a first fluid conduit and a second fluid conduit (5), the second conduit being for fresh water supply and located in the first conduit, the second conduit having conduit sections in a serpentine path through the first conduit, the first and second conduits being arranged generally for counter-flow heat exchange with the second conduit having elongate sections configured generally transverse to a flow direction through the first conduit, the first conduit having baffles at an inlet and an outlet thereof for keeping the second conduit submerged in the first conduit, the device being provided with a foot or bodyweight operated actuation valve for actuating fresh water supply through the first conduit.

Abstract: The present invention relates to a device for vibrating the pin of a viscometer, wherein the emitter arm of the pin is fixed to the end of a spring leaf pivoted about a fixed point, said leaf abutting on a ball bearing whose inner race is moved in rotation by a drive shaft eccentric with respect to the axis of the bearing and whose outer race is locked in rotation. The invention is more particularly applied to vibrating viscometers of the type comprising a pin.