Met One 130-115 Data Multiplexer 3 Cards 115V 60Hz Environmental Monitor 1994

Met One 130-115 Data Multiplexer 3 Cards 115V 60Hz Environmental Monitor 1994

The Met One 130-115 is a benchtop data multiplexer manufactured by Met One Instruments of Grants Pass, Oregon. It is designed to collect and route data signals from multiple environmental sensors — such as particle counters, meteorological sensors, and air quality monitoring instruments — into a single serial output stream for data logging or further processing. The unit houses a 10-slot card cage and ships here with three expansion cards installed. It runs on 115V AC, 60Hz power and connects to a host system via a rear-panel D-sub serial port.

Specifications & What's Included

• Brand: Met One Instruments, Grants Pass, OR
• Part/Model No.: 130-115
• Date of Manufacture: March 1994
• Voltage: 115V AC
• Frequency: 60Hz
• AC Input Connector: IEC C14 (standard 3-pin inlet), rear panel
• Expansion Card Slots: 10 total
• Expansion Cards Installed: 3 (orange-tabbed, visible in rear card cage)
• Serial Interface: D-Sub serial port (rear panel)
• Power Switch: Rocker ON/OFF, rear panel
• Front Panel Indicator: Red POWER LED
• Form Factor: Benchtop/desktop enclosure
• Internal Components: Main controller PCB backplane, ribbon cable, internal power transformer

Applications

The Met One 130-115 was designed for use in environmental data acquisition systems, most commonly paired with Met One particle counters and meteorological sensor arrays. Data multiplexers of this type centralize the serial data output from multiple instruments — each plugged into a card slot — and route the combined data stream to a single host computer or data logger, simplifying wiring and reducing the number of serial ports required at the host. Met One Instruments has been a major supplier of air quality and particle counting equipment to industrial hygiene, clean room, and atmospheric monitoring applications since the 1970s. A unit of this vintage, manufactured in March 1994, would have been deployed in clean room monitoring networks, environmental compliance stations, and research laboratory data acquisition setups of the mid-1990s era. Replacement parts and compatible sensor cards for the 130-series are sought by facilities that still operate legacy Met One sensor networks.