Vehicle Storage Cabinets
The PharmGuard system is a thermoelectric-based system for controlling the temperature of EMS drug storage cabinets and containers.
PUGS Thermoelectric Cabinets
The PharmGuard ® is powered by 12 Volts DC and consumes a maximum of 5 amps or 60 watts of electrical power when running at full output.
The PharmGuard® 150 draws 9.8 Amps of current at the full output. The PharmGuard ® systems can be supplied with a custom power
supply that provides electrical power from both the 120-volt shoreline connection as well as 12 volts DC from the vehicle electrical system.
The power supply automatically switches from the shoreline power to the vehicle's power supply when the 120-volt AC shoreline is disconnected.
Power consumption is significantly lower after the temperature inside the cabinet or container stabilizes.
The PharmGuard ® provides cooling when the ambient temperature exceeds 75º F and maintains the internal temperature of the drug storage
container to approximately 75º F or 23º C. When the ambient temperature drops below 59º F or 15º C the system provides controlled heating to
maintain the temperature at 59º F or 15º C. When temperatures are between 59º F / 15º C and 75º F / 23º C the system provides only air circulation
inside the drug storage cabinet. In this mode of operation, the system draws minimal electrical current (< 1/3 amp).
The PharmGuard thermoelectric system consists of two or more elements of n and p-type doped semiconductor material that are connected
electrically in series and thermally in parallel. These thermoelectric elements and their electrical interconnects typically are mounted
between two ceramic substrates. The substrates hold the overall structure together mechanically and electrically insulate the individual
elements from one another and from external mounting surfaces.
The PharmGuard ® has no user controls. It switches from cooling to heating modes automatically. The system has only one moving part,
a small fan to circulate air thru the storage container. Temperature is sensed with a medical grade sensor and each unit has an integrated
digital thermometer for easy temperature monitoring. The system uses an all-solid state design for reliable service and a long life.
Proven digital control technologies are utilized to insure accurate temperatures, stability and reliability
When installing as a retrofit, new vehicle or cabinet,
the PharmGuard ® temperature control system can be mounted thru the wall of the drug storage cabinet and is approximately 5.75 inches
wide, 6 inches long and 3 inches high, slightly larger than a box of gloves. The PharmGuard ® is designed to control the temperature
of a well insulated drug storage cabinet no larger than 3.5 cubic feet. The PharmGuard ® 150 is designed to work with
cabinets as large as 7.0 cubic feet in volume. The system is designed to provide temperature control for EMS pharmaceuticals only. If your
drug storage cabinets are used to store electronic equipment such as battery chargers, radios, or other heat producing items, these items will
need to be stored separately from the pharmaceuticals. The system requires a well-insulated cabinet for proper operation. Do not
expect the PharmGuard ® to provide adequate temperature control to an over-sized cabinet or one with uninstalled metal
or clear acrylic doors. [Product Page]
Temperature recordings (Blue) from the inside of an insulated mock up of an ambulance drug storage cabinet compared to the outside ambient
air temperature (Red) . Temperature readings were made from June 1, 2002 through August 25, 2002 at 60 minute intervals