A06 Specifications.docx

Salient Characteristics Special Order S21067

STATION COMPONENTS

SALIENT CHARACTERISTICS:

14 EA, Enclosure:

1. Shall be capable of tripod mast mounting.

2. Shall be made of fiberglass-reinforced polyester material with white, reflective outside.

3. Shall be no smaller than 16 x 14 x 5.5 in. inside.

4. Shall have six (6) sealed cable holes.

5. Shall include door gasket; external grounding lug; stainless-steel, non-corrosive, hinge; and lockable hasps.

12 EA, Soil Moisture Profile Sensor:

6. Shall measure soil volumetric water content, permittivity, electrical conductivity, and temperature.

7. Shall have relative dielectric permittivity with range from 1 to 80 and accuracy of ±1 permittivity unit (between 4 and 42 permittivity) or better.

8. Shall have electrical conductivity range from 0 to 10 dS/m and accuracy of ±2% (0 to 2.5 dS/m) and ±5% Full Range or better.

9. Shall have maximum installation torque of 54 N m (40 ft⋅lb).

10. Shall have a total length of 0.5 m and measure at 5, 10, 20, 30, 40, and 50 cm (2, 4, 8, 12, 16, and 20 in.) along the sensor.

11. Shall have operating voltage range from 9 to no more than 36 Vdc.

12. Shall have diameter no larger than 5.8 cm (2.3 in.) with threads.

13. Shall have current drain when active of no more than 64 mA at 12 Vdc.

14. Shall be no larger than 0.55 m (21.5 in.) and weigh no more than 1.9 kg (4.2 lb).

15. Shall have volumetric water content accuracy at ±1.5% typical with most soils.

a. Soils with high organic matter or high clay content may need a soil-specific calibration due to the dispersive nature of these materials.

16. Shall have soil temperature with accuracy at ± 0.15°C between -30° to +40°C, or better.

14 EA, Temperature/RH Probe:

17. Shall have 10ft cable with tinned wires.

18. Shall have UV stable, white, Polyethylene Terephthalate Polyester housing material.

19. Shall be powered from an external 12 VDC (nominal) power source.

20. Shall have sensing element Sensirion SHT35 or equivalent.

21. Shall have SDI-12 communication.

22. Shall have outer glass-filled polypropylene cap with a stainless-steel mesh dust filter and inner PTFE filter with a porosity greater than 99.99% for particles of 200 nm or larger size or better.

23. Shall be no larger than 18 mm (0.7 in.) diameter, 180 mm (7.1 in.) long without cable fitted and weigh no more than 250 g (8.8 oz) without cable.

24. Shall conform to IEC61326:2013.

25. Shall have current drain at 50 μA when inactive and 0.6 mA when taking measurements at 0.5 s.

26. Shall have IP67 housing classification or better.

27. Shall have operating temperature range from -40° to at least +70°C.

28. Shall be capable of relative humidity measurements.

b. Shall have typical stability at ±0.5% per year.

c. Shall have temperature dependence better than ±1% in -40° to +60°C range.

d. Shall have short-term hysteresis less than ± 1% RH.

e. Shall have response time with filter less than 8 s (63% response time in still air).

f. Shall have output resolution of 0.01% RH.

g. Shall have measurement range from 0 to 100% RH (-20° to +60°C).

h. Shall have accuracy at ±2% in 80% to 100% range at 25°C or better

29. Shall be capable of air temperature measurements.

i. Shall have accuracy of ±0.2°C in -40 to +70°C range.

j. Shall have measurement range from -40° to at least +70°C

k. Shall have output resolution at 0.001°C

l. Shall have response time with filter less than 130 s (63% response time in air).

14 EA, 10-Plate Solar Radiation Shield:

30. Shall be compatible with the sensor specs listed above.

31. Shall be UV-stabilized, white thermoplastic plates; aluminum mounting bracket; white powder-coated stainless-steel U-bolt clamp.

32. Shall be at least 20.8 cm (8.19 in.) high.

33. Shall have plate diameter no smaller than 12.3 cm (4.84 in.).

34. Shall weigh no more than 1.01 kg (2.23 lb).

14 EA, Infra-Red Radiometer:

35. Shall be infrared radiometer that measures both the surface temperature of an object without contact and the sensor-body temperature.

36. Shall be a thermopile and thermistor sensor housed in an aluminum body with a germanium lens.

37. Shall have a 22-degree half-angle field of view or better.

38. Shall have absolute accuracy of at least ±0.5°C when at -40° to +70°C, or better.

39. Shall have a less than 1 second response time to changes in target temperature or better.

40. Shall have operating temperature range from -55° to at least +80°C.

41. Shall have operating relative humidity range from 0 to at least 100% RH.

42. Shall have body temperature output signal range from 0 to 2500 mV or better.

43. Shall have target temperature output signal of 60 μV per °C difference for sensor body or better.

44. Shall have wavelength range from 8 to at least 14 μm.

45. Shall run on 2.5 V for thermistor.

46. Shall have cable that is a shielded 4-conductor wire with Santoprene casing, ending in pigtails.

a. Shall be at least 4.5 m (14.76 ft) long and twisted.

b. Shall not be integrated into the sensor allowing cable to be swapped out if needed.

14 EA, Net Radiometer:

47. Shall be a four-component net radiometer with two (2) thermopile pyranometers and two (2) pyrgeometers sensors.

48. Thermopile pyranometers specifications:

a. Shall have a spectral range from 385 to at least 2105 nm when upward-looking and 295 to at least 2685 nm when downward-looking.

b. Shall have sensitivity of 0.057 mV per W/m2 when upward-looking and 0.15 mV per W/m2 when downward-looking or better.

c. Shall have expected output range from 0 to at least 114 mV when upward-looking and 0 to at least 300 mV when downward-looking.

49. Pyrgeometer specifications:

a. Shall have a spectral range from 5,000 to at least 30,000 nm.

b. Shal have sensitivity at 0.12 mV per W/m2 or better.

c. Shall have expected output range from -24 to at least +24 mV.

50. Shall have SD1-12 communications.

51. Shall have operating temperature range from -50° to +80°C and 0 to 100% humidity or better.

52. Shall have a heater with current drain of 63 mA or less when heater is turned on and communication is enabled.

53. Shall have a current drain of 1.5 mA or less when heater is turned off and communication is enabled.

54. Shall have a 1 s response time or better.

55. Shall include pigtail lead cable for data logger interface that is at least 17 ft long with tinned wires.

56. Shall include mounting rod and a carrying case.

28 EA, Solar Panel:

57. Shall be 20 W.

58. Shall have 15 ft cable with tinned wires.

59. Shall mount directly to pipe of 0.75 in. to 1.5 in diameter with U-bolt and matching nuts.

2 EA, Sonic Ranging Sensor:

60. Shall be used for measuring snow depth.

61. Shall use a multiple echo processing algorithm to ensure measurement reliability.

62. Shall have temperature accuracy of ±0.2° at 0° to 50°C.

63. Shall have baud rates from 1200 to at least 38400 bps when in RS-232 or RS-485 output modes.

64. Shall be CE Compliant.

65. Shall have a 10 ft cable ending in tinned wires.

66. Shall have a less than 1.0 second measurement time or better.

67. Shall have accuracy of ±1 cm (0.4 in.) or 0.4% of distance to target, whichever is greatest.

68. Shall be powered from an external 12 VDC (nominal) power source.

69. Shal have beam acceptance at 30° and resolution at 0.25 mm (0.01 in.) or better.

12 EA, Right Angle Mounting Kit:

70. Shall be a bracket with a 90 ° bend that attaches a sensor with a vertical pipe mount to a crossarm, specs below.

71. Shall be compatible with a 1 to 1.5-inch outer diameter pipe.

72. Shall include two (2) 1.5 in. U-bolts.

12 EA, Sensor Mounting Stand:

73. Shall be compatible with the Net Radiometers, specs listed above, allowing it to be mounted on a mast or pipe with 1.75 to 2 in O.D.

74. Shall be a spring-mounted leveling plate attached to a right-angle mount with U-bolts.

14 EA, Sensor Crossarm:

75. Shall be a mounting kit that is used to attach a crossarm to a tripod.

76. Shall have one (1) 304 stainless-steel mounting bracket.

77. Shall include two (2) 5.4 cm (2.125 in.) and four (4) 3.81 cm (1.5 in.) U-bolts with hardware.