RSM Room Status Monitor

Complete system including a backlit RGB LCD display with a graphic user interface, audible and visual alarm

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Series RSM Room Status Monitor is designed for critical low differential pressure applications that require stringent pressure monitoring and alarming. The Series RSM can be configured to monitor positive or negative pressure in protected environments and hospital isolation rooms per CDC guidelines. The RSM is a complete system that includes a backlit RGB LCD display with a graphic user interface which enables access to pressure, security, calibration, and alarm setup. The touch-screen displays menus that guide the user through setup, as well as setting up password protection. Red and green LED's and a local audible alarm (with time delay feature) alert personnel to system status. The RSM has a NEMA 1 (IP20) rated fire retardant plastic for indoor applications. True differential pressure is displayed with a resolution of 0.001 in W.C. The very low pressure capacitance is dead ended and avoids the potential for cross contamination of the room and reference space as well as eliminating drift that results from fouling of flow based sensors, which by nature have a flow path connecting the protected and reference spaces. Additionally, there are two levels of password protection available as well as optional BACnet MSTP communication. A calibration certificate is provided with every unit.

• Accurately monitor protective environments for negative or positive pressure ensuring safety and reducing risk of catastrophic events
• Audible and visual alarm provides immediate local alerts allowing corrective action to be taken quicker to eliminate the problem from becoming widespread
• Password protected set up menu helps to insure no errors by untrained personnel
• Optional BACnet communication from devices provides integration into building control system for automated control and centralized monitoring and alarming


Service Air or nonconductive, nonexplosive gases
Accuracy 0.5% FS
Temperature Limits 32F - 120F (0C - 50C)
Humidity Limits 5% - 95% RH, Non-condensing
Thermal Effects 0.03% FS/F ( 0.05% FS/C)
Pressure Limits 15 in W.C. ( 3.7 kPa)
Supply Voltage Order Code A (24 VAC): 18 - 32 VAC, 50 - 60 Hz.
Order Code B (120 VAC): 85 - 265 VAC, 50 - 60 Hz.
Main supply voltage fluctuations up to 10%
Power Consumption (voltage output) 5 W
Output Signal Selectable 4 - 20 mA (2-wire), 0 - 5 VDC (3-wire), or 0 - 10 VDC (3-wire)
Switch Type SPST
Loop Resistance (4-20 mA output) 0 Ω - 510 Ω
Electrical Connection Removable terminal block
Process Connections Barbed fittings for 3/16 in ID tubing
Enclosure Rating NEMA 1 (IP20) rated for indoor applications
Housing Fire retardant plastic
Mounting Mount to standard double gang metal electrical box using 4 in x 4 in plaster ring adapter
Dimensions (H x W x D) 8 in x 5.4 in x 1.8 in (20.3 cm x 13.7 cm x 4.1 cm)
Weight 1.5 lb (680 g)
Communications BACnet MSTP ASC optional
Agency Approval CE, CSA

• Hospital Isolation Wards
• Pharmaceutical
• Manufacturing
• Clean rooms
• Research labs
• Animal facilities