Advanced Temperature Control

EVVE Long Range Cameras are specially built for surveillance in challenging environments. Our heat and cold technology without moving parts is unique in the world and ensures that the temperature inside always stays between 20 and 25 degrees. This should be advantageous especially in desert border areas. Our systems are the most rugged in the world. We can operated in a temperature spectrum from -70 degrees to +80 degrees.

Temperature control system

Evve Longe range (ELR) has developed an advanced Temperature Control System, which uses the ELR Ma Ri to create a heat flux between the junction of two different types of materials. An ELR cooler, heater, or thermo-electric heat pump is a solid-state active heat pump which transfers heat from one side of the device to the other, with consumption of electrical energy, depending on the direction of the current. Such an instrument is also called an ELR Ma Ri, ELR Ma Ri heat pump, solid state refrigerator, or thermoelectric cooler (TEC). It can be used either for heating or for cooling, although in practice the main application is cooling. It can also be used as a temperature controller that either heats or cools.


This technology is far less commonly applied to refrigeration than vapor-compression refrigeration is. The primary advantages of an ELR Ma Ri cooler compared to a vapor-compression refrigerator are its lack of moving parts or circulating liquid, very long life, invulnerability to leaks, small size, and flexible shape.

Thermoelectric generator

An ELR Ma Ri cooler can also be used as a thermoelectric generator. When operated as a cooler, a voltage is applied across the device, and as a result, a difference in temperature will build up between the two sides. When operated as a generator, one side of the device is heated to a temperature greater than the other side, and as a result, a difference in voltage will build up between the two sides (the Seebeck effect).

About Evve

Evve Long Range B.V. (ELR) is an innovation and technology company. ELR has its own R&D division, utilizing advanced technology and creating the most innovative surveillance products. Not only in design and performance but also with respect to endurance and maintenance. ELR is setting the standards for the long range surveillance market.


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Reg. No. 67664059
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