Salient_Characteristics.pdf

The USGS Water Science Center in Williamsport, PA needs to purchase two (2) constant flow bubbler gage and recorder. This equipment is intended to be used for stream gaging and monitoring of tidal or coastal areas, estuaries, groundwater, and reservoirs. Therefore, it is imperative that this equipment meets or exceeds the requirements below.

SALIENT CHARACTERISTICS

SUTRON ACCUBAR CONSTANT FLOW BUBBLER GAGE & RECORDER, 50psi

1. Shall have a NEMA-4 fiberglass IP64, lockable enclosure.

2. Shall include pump, tank, manifold, control board, and display/keyboard.

3. Shall be self-contained capable of measuring stage/level, internal temperature, battery, and pressure.

4. Shall have a stage/level/pressure accuracy of 0.05% reading with minimum of 0.01 ft.

5. Shall have a stage/level/pressure range of 50psi, 115 feet (35 meters).

6. Shall have measurement technique of constant low bubbler with user-programmed bubble rate.

7. Shall have an operating temperature of -25°C to +60°C (-13°F to +140°F).

8. Shall have built-in memory for over 300,000 readings; SD/MMC card.

9. Shall have a display type of 2X20 LCD with backlight.

10. Shall have a minimum of 6 button keypad.

11. Shall have a maximum purge pressure of 50 psi.

12. Shall have an outlet for 3/8 inch (9.53 mm) tubing.

13. Shall include silica gel desiccant capable of lasting up to a year.

14. Shall have communication ports for SDI-12, RS232 and RS485.

15. Shall be capable of power requirements of 8 to 16 VDC.

16. Shall have a built-in data logger.

17. Shall be capable of auto purge and user-forced purge option.

SPECIFICALLY MUST INCLUDE:

2 each, #56-0133-50-1, Accubar Constant Flow Bubbler with Recorder, 50psi (115ft.)