Standard Features (Base ovens):
All of the microwave ovens that we provide have been evaluated and tested for the applications for which they are intended. MRA offers a variety of different laboratory microwave ovens. Standard features include:

Maximum power
Depending on the model, the maximum microwave power delivered by the magnetron (the device that converts electricity to microwaves) is 1,000 watts to 3,200 watts.

Minimum average power:
The minimum average microwave power delivered by the magnetron to the sample or material in the cavity can be as low as 250 watts average, depending on the model. However, it is important to understand how this minimum average power is achieved. Most microwave ovens adjust the power level by pulsing the microwave source on and off at full power. For example, a 1,000 watt oven will turn on at 1,000 watts for 10 seconds, then turn off for 30 seconds. This will yield an average power output of 250 watts. If the application is heating a large samples of bulk material, this may be perfectly acceptable. On the other hand if a researcher is trying to heat a 150-ml sample at 250 watt for 7 seconds, in reality, the sample will be heated at 1,000 watts for 7 seconds. This will not yield the expected results, as the sample will be significantly over heated. For those that need true low power or true power variation, please see the “true power variation” option below.

Stainless steel cavities:
All of the cavities are stainless steel for heavy-duty use. Stainless steel is easy to keep clean and resists many of the chemicals and corrosive materials heated in laboratory ovens.

Touch pad controls with a minimum of 5 power levels:
All models feature easy to use touch pads for programming and setting power levels. Depending on the model, up to 6 power levels are available.

Programmable 2 stage heating:
The microwave ovens are programmable for consistent, easy to use processing cycles. The ovens feature a minimum of 8 user programmable buttons (some models have 10) for heating cycles that are used often. Once the keys are programmed and locked, the user simply presses the button that corresponds with the desired heating cycle. The microwave oven then goes through the heating cycle that is programmed.

The ovens can be programmed for 2 different staged heating cycles within one program. This allows for heating at different power settings during the heating cycle, giving increased flexibility and timesaving. Some of the models have 3 staged heating cycles.

Digital display:
Digital displays are user friendly and aid in the programming of the oven. They also show the oven status within a heating cycle.

Self diagnostics:
Each oven runs a self-diagnostics program that detects faults or conditions with in the oven that may damage it. This feature is designed to protect the microwave oven. Often the fault can be cleared by the user. For instance, one of the more common problems detected is over temperature within the oven. A clogged or blocked air filter, is a simple problem for the user to rectify.

Lighted cavity:
The cavities are lighted in the heat mode allowing the user to see the sample being heated.

Listings and approvals:
Each microwave oven is UL listed. All meet United States FCC requirements. Unlike home microwave ovens, all are designed for commercial environments and therefore meets or exceeds all safety and performance standards set for commercial applications.

One year warranty
The microwave ovens all have a one-year warranty against defects.