Features:
- Semi Automatic with manual reset operated automatically on level fall only - manual resetrequired on level rise
- Wide Differential signle stage only alailable only for controls with mercury switch contacts
- 440 Volt Service for controls with mercury switch contacts only. Identified by the digit 5 in citcuit specification number such as in 5820, 5821
The reliable 301 Series has proven to be a rugged economical choice for top mounting on tanks where side mounting is not practical, or for use in sumps. These units feature a fixed deadband for high or low alarm or shutdown. This control can be mounted on top of any closed or open tank or sump by use of the 3/4" NPT connection. Flanges are also available in various sizes, pressure rating and material to meet any installation. Several size floats are available to accommodate liquids to a specific gravity of 0.5 and depths to 12 feet. Electrical switch actions, SPST, SPDT, DPDT, or DPST, can be ordered to satisfy most applications. Two-stage operation available, consult factory. Hermetically sealed snap action or mercury contacts provide for high or low current or voltage requirements. Enclosures include general purpose NEMA 1, weatherproof NEMA 4, explosion-proof NEMA 7, 9. The explosion-proof, vapor proof version combines weatherproof, vapor proof, and explosion-proof NEMA 4, 7, 9 construction in one enclosure. The 301 Series can be used on pressurized vessels.
For more information, please see 
Data Sheet
Meantime you may review Dwyer bestsellers or review the list of all available Dwyer products in the table below.
You may request a quote for a specific product or just contact us at any time
For more products see Product List
| Part Number |
| 301-G-4806-AS-12-1.0-8 |
| 301-G-4806-AS-12-0.9-8 |
| 301-G-4806-AS-12-0.82-8 |
| 301-G-4806-AS-12-0.75-8 |
| 301-G-4806-AS-14-1.0-8 |
| 301-G-4806-AS-14-0.9-8 |
| 301-G-4806-AS-14-0.82-8 |
| 301-G-4806-AS-14-0.75-8 |
| 301-G-4806-AS-16-1.0-8 |
| 301-G-4806-AS-16-0.9-8 |
| 301-G-4806-AS-16-0.82-8 |
| 301-G-4806-AS-16-0.75-8 |
| 301-G-4806-AS-20-1.0-8 |
| 301-G-4806-AS-20-0.9-8 |
| 301-G-4806-AS-20-0.82-8 |
| 301-G-4806-AS-20-0.75-8 |
| 301-G-4806-AS-30-1.0-8 |
| 301-G-4806-AS-30-0.9-8 |
| 301-G-4806-AS-30-0.82-8 |
| 301-G-4806-AS-30-0.75-8 |
| 301-G-4806-AS-40-1.0-8 |
| 301-G-4806-AS-40-0.9-8 |
| 301-G-4806-AS-40-0.82-8 |
| 301-G-4806-AS-40-0.75-8 |
| 301-G-4806-AS-50-1.0-8 |
| 301-G-4806-AS-50-0.9-8 |
| 301-G-4806-AS-50-0.82-8 |
| 301-G-4806-AS-50-0.75-8 |
| 301-G-4806-AS-60-1.0-8 |
| 301-G-4806-AS-60-0.9-8 |
| 301-G-4806-AS-60-0.82-8 |
| 301-G-4806-AS-60-0.75-8 |
| 301-G-4806-AS-70-1.0-8 |
| 301-G-4806-AS-70-0.9-8 |
| 301-G-4806-AS-70-0.82-8 |
| 301-G-4806-AS-70-0.75-8 |
| 301-G-4806-AS-80-1.0-8 |
| 301-G-4806-AS-80-0.9-8 |
| 301-G-4806-AS-80-0.82-8 |
| 301-G-4806-AS-80-0.75-8 |
| 301-G-4806-AS-90-1.0-8 |
| 301-G-4806-AS-90-0.9-8 |
| 301-G-4806-AS-90-0.82-8 |
| 301-G-4806-AS-90-0.75-8 |
| 301-G-4806-BS-12-1.0-8 |
| 301-G-4806-BS-12-0.9-8 |
| 301-G-4806-BS-12-0.82-8 |
| 301-G-4806-BS-12-0.75-8 |
| 301-G-4806-BS-14-1.0-8 |
| 301-G-4806-BS-14-0.9-8 |
| 301-G-4806-BS-14-0.82-8 |
| 301-G-4806-BS-14-0.75-8 |
| 301-G-4806-BS-16-1.0-8 |
| 301-G-4806-BS-16-0.9-8 |
| 301-G-4806-BS-16-0.82-8 |
| 301-G-4806-BS-16-0.75-8 |
| 301-G-4806-BS-20-1.0-8 |
| 301-G-4806-BS-20-0.9-8 |
| 301-G-4806-BS-20-0.82-8 |
| 301-G-4806-BS-20-0.75-8 |
| 301-G-4806-BS-30-1.0-8 |
| 301-G-4806-BS-30-0.9-8 |
| 301-G-4806-BS-30-0.82-8 |
| 301-G-4806-BS-30-0.75-8 |
| 301-G-4806-BS-40-1.0-8 |
| 301-G-4806-BS-40-0.9-8 |
| 301-G-4806-BS-40-0.82-8 |
| 301-G-4806-BS-40-0.75-8 |
| 301-G-4806-BS-50-1.0-8 |
| 301-G-4806-BS-50-0.9-8 |
| 301-G-4806-BS-50-0.82-8 |
| 301-G-4806-BS-50-0.75-8 |
| 301-G-4806-BS-60-1.0-8 |
| 301-G-4806-BS-60-0.9-8 |
| 301-G-4806-BS-60-0.82-8 |
| 301-G-4806-BS-60-0.75-8 |
| 301-G-4806-BS-70-1.0-8 |
| 301-G-4806-BS-70-0.9-8 |
| 301-G-4806-BS-70-0.82-8 |
| 301-G-4806-BS-70-0.75-8 |
| 301-G-4806-BS-80-1.0-8 |
| 301-G-4806-BS-80-0.9-8 |
| 301-G-4806-BS-80-0.82-8 |
| 301-G-4806-BS-80-0.75-8 |
| 301-G-4806-BS-90-1.0-8 |
| 301-G-4806-BS-90-0.9-8 |
| 301-G-4806-BS-90-0.82-8 |
| 301-G-4806-BS-90-0.75-8 |
| 301-G-4806-CS-12-1.0-8 |
| 301-G-4806-CS-12-0.9-8 |
| 301-G-4806-CS-12-0.82-8 |
| 301-G-4806-CS-12-0.75-8 |
| 301-G-4806-CS-14-1.0-8 |
| 301-G-4806-CS-14-0.9-8 |
| 301-G-4806-CS-14-0.82-8 |
| 301-G-4806-CS-14-0.75-8 |
| 301-G-4806-CS-16-1.0-8 |
| 301-G-4806-CS-16-0.9-8 |
| 301-G-4806-CS-16-0.82-8 |
| 301-G-4806-CS-16-0.75-8 |
| 301-G-4806-CS-20-1.0-8 |
| 301-G-4806-CS-20-0.9-8 |
| 301-G-4806-CS-20-0.82-8 |
| 301-G-4806-CS-20-0.75-8 |
| 301-G-4806-CS-30-1.0-8 |
| 301-G-4806-CS-30-0.9-8 |
| 301-G-4806-CS-30-0.82-8 |
| 301-G-4806-CS-30-0.75-8 |
| 301-G-4806-CS-40-1.0-8 |
| 301-G-4806-CS-40-0.9-8 |
| 301-G-4806-CS-40-0.82-8 |
| 301-G-4806-CS-40-0.75-8 |
| 301-G-4806-CS-50-1.0-8 |
| 301-G-4806-CS-50-0.9-8 |
| 301-G-4806-CS-50-0.82-8 |
| 301-G-4806-CS-50-0.75-8 |
| 301-G-4806-CS-60-1.0-8 |
| 301-G-4806-CS-60-0.9-8 |
| 301-G-4806-CS-60-0.82-8 |
| 301-G-4806-CS-60-0.75-8 |
| 301-G-4806-CS-70-1.0-8 |
| 301-G-4806-CS-70-0.9-8 |
| 301-G-4806-CS-70-0.82-8 |
| 301-G-4806-CS-70-0.75-8 |
| 301-G-4806-CS-80-1.0-8 |
| 301-G-4806-CS-80-0.9-8 |
| 301-G-4806-CS-80-0.82-8 |
| 301-G-4806-CS-80-0.75-8 |
| 301-G-4806-CS-90-1.0-8 |
| 301-G-4806-CS-90-0.9-8 |
| 301-G-4806-CS-90-0.82-8 |
| 301-G-4806-CS-90-0.75-8 |
| 301-G-4806-A0-12-1.0-8 |
| 301-G-4806-A0-12-0.9-8 |
| 301-G-4806-A0-12-0.82-8 |
| 301-G-4806-A0-12-0.75-8 |
| 301-G-4806-A0-14-1.0-8 |
| 301-G-4806-A0-14-0.9-8 |
| 301-G-4806-A0-14-0.82-8 |
| 301-G-4806-A0-14-0.75-8 |
| 301-G-4806-A0-16-1.0-8 |
| 301-G-4806-A0-16-0.9-8 |
| 301-G-4806-A0-16-0.82-8 |
| 301-G-4806-A0-16-0.75-8 |
| 301-G-4806-A0-20-1.0-8 |
| 301-G-4806-A0-20-0.9-8 |
| 301-G-4806-A0-20-0.82-8 |
| 301-G-4806-A0-20-0.75-8 |
| 301-G-4806-A0-30-1.0-8 |
| 301-G-4806-A0-30-0.9-8 |
| 301-G-4806-A0-30-0.82-8 |
| 301-G-4806-A0-30-0.75-8 |
| 301-G-4806-A0-40-1.0-8 |
| 301-G-4806-A0-40-0.9-8 |
| 301-G-4806-A0-40-0.82-8 |
| 301-G-4806-A0-40-0.75-8 |
| 301-G-4806-A0-50-1.0-8 |
| 301-G-4806-A0-50-0.9-8 |
| 301-G-4806-A0-50-0.82-8 |
| 301-G-4806-A0-50-0.75-8 |
| 301-G-4806-A0-60-1.0-8 |
| 301-G-4806-A0-60-0.9-8 |
| 301-G-4806-A0-60-0.82-8 |
| 301-G-4806-A0-60-0.75-8 |
| 301-G-4806-A0-70-1.0-8 |
| 301-G-4806-A0-70-0.9-8 |
| 301-G-4806-A0-70-0.82-8 |
| 301-G-4806-A0-70-0.75-8 |
| 301-G-4806-A0-80-1.0-8 |
| 301-G-4806-A0-80-0.9-8 |
| 301-G-4806-A0-80-0.82-8 |
| 301-G-4806-A0-80-0.75-8 |
| 301-G-4806-A0-90-1.0-8 |
| 301-G-4806-A0-90-0.9-8 |
| 301-G-4806-A0-90-0.82-8 |
| 301-G-4806-A0-90-0.75-8 |
| 301-G-4806-B0-12-1.0-8 |
| 301-G-4806-B0-12-0.9-8 |
| 301-G-4806-B0-12-0.82-8 |
| 301-G-4806-B0-12-0.75-8 |
| 301-G-4806-B0-14-1.0-8 |
| 301-G-4806-B0-14-0.9-8 |
| 301-G-4806-B0-14-0.82-8 |
| 301-G-4806-B0-14-0.75-8 |
| 301-G-4806-B0-16-1.0-8 |
| 301-G-4806-B0-16-0.9-8 |
| 301-G-4806-B0-16-0.82-8 |
| 301-G-4806-B0-16-0.75-8 |
| 301-G-4806-B0-20-1.0-8 |
| 301-G-4806-B0-20-0.9-8 |
| 301-G-4806-B0-20-0.82-8 |
| 301-G-4806-B0-20-0.75-8 |
| 301-G-4806-B0-30-1.0-8 |
| 301-G-4806-B0-30-0.9-8 |
| 301-G-4806-B0-30-0.82-8 |
| 301-G-4806-B0-30-0.75-8 |
| 301-G-4806-B0-40-1.0-8 |
| 301-G-4806-B0-40-0.9-8 |
| 301-G-4806-B0-40-0.82-8 |
| 301-G-4806-B0-40-0.75-8 |
| 301-G-4806-B0-50-1.0-8 |
