| | SPEC Sensors, LLC | 110-102 3SP-CO-1000 CARBON MONOX | (1+)起订 | | | |
| | SPEC Sensors, LLC | 110-109 3SP-CO-1000 CARBON MONOX | (1+)起订 | | | |
| | SPEC Sensors, LLC | 110-202 3SP-ETHANOL-1000 ETHANOL | (1+)起订 | | | |
| | SPEC Sensors, LLC | 110-205 3SP-ETHANOL-1000 ETHANOL | (1+)起订 | | | |
| | SPEC Sensors, LLC | 110-303 3SP-H2S 50 HYDROGEN SULF | (1+)起订 | | | |
| | SPEC Sensors, LLC | 110-304 3SP-H2S 50 HYDROGEN SULF | (1+)起订 | | | |
| | SPEC Sensors, LLC | 110-401 3SP-O3-20 OZONE SENSOR O | (1+)起订 | | | |
| | SPEC Sensors, LLC | 110-402 3SP-O3-20 OZONE SENSOR O | (1+)起订 | | | |
| | SPEC Sensors, LLC | 110-501 3SP-NO2-20 NITROGEN DIOX | (1+)起订 | | | |
| | SPEC Sensors, LLC | 110-502 3SP-NO2-20 NITROGEN DIOX | (1+)起订 | | | |
| | SPEC Sensors, LLC | 110-601 3SP-SO2-20 SULFUR DIOXID | (1+)起订 | | | |
| | SPEC Sensors, LLC | 110-602 3SP-SO2-20 SULFUR DIOXID | (1+)起订 | | | |
| | SPEC Sensors, LLC | 110-801 3SP-IAQ-100 INDOOR AIR Q | (1+)起订 | | | |
| | SPEC Sensors, LLC | 110-802 3SP-IAQ-100 INDOOR AIR Q | (1+)起订 | | | |
| | SPEC Sensors, LLC | 110-9023SP-RESPIRR-20 RESPIRATOR | (1+)起订 | | | |
| | SPEC Sensors, LLC | 110-901 3SP-RESPIRR-20 RESP. IRR | (1+)起订 | | | |
| | Parallax Inc. | ALCOHOL BENZINE GAS SENSOR | | | | |
| | Parallax Inc. | CARBON DIOXIDE GAS SENSOR MODULE | | | | |
| | Parallax Inc. | METHANE GAS SENSOR MODULE | | | | |
| | Parallax Inc. | MOD GAS SENSOR CARBON MONOXIDE | | | | |