Additional information
| Weight | 56.4 oz |
|---|---|
| Dimensions | 3.6 × 4.4 × 2.4 in |
The model 820 Shallow Water is a high-precision submersible tiltmeter for use in fresh and saltwater applications. Using an absolute gravity-referenced electrolytic sensor, the 820 delivers superior measurement accuracy with virtually no long-term drift. High-gain units are sensitive to <0.0017 mm/m or better. Output options include analog (±5 VDC, ±10 VDC), current (4-20mA), and digital (RS-232 and RS-422). All units are rated to 200 meters (656.2 ft) waterproof for advanced protection from the elements. Use the 820 “Shallow Water” for structural monitoring, angle measurement and control, platform leveling, and more.
A820: ±5V Output
Performance Specifications
| High Gain | Standard | Wide Angle | |
| Angular Range (°) | ±0.5 | ±3.0 | ±50 |
| Resolution (°) | <0.0001 | 0.0001 | 0.002 |
| Repeatability (°) | 0.0003 | 0.0003 | 0.004 |
| Non-linearity (%) | 0.1 | 0.1 | 0.1 |
| Time Constant | 0.15 sec | ||
| Kz Temperature Coefficient (°/C) | ±0.0002 | ±0.002 | |
| Ks Temperature Coefficient (%/°C) | 0.04 | <0.1 | |
| Baud Rate | 9600 (default), 19200, 28800, 57600, 115200, 130400 | ||
| Output | RS-232, RS-422 | ||
| Output Format | NMEA XDR, Trimble TCM, Ashtec compatible, Simple (default: X, Y, Temp., S/N) | ||
| Channels | Tilt, Temperature, S/N | ||
| Temperature Output | 0.1°C/mV typical (single ended; 0°C = 0mV) |
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| Power | 7-28 VDC @ 30mA, 250 mV ripple max, reverse polarity protected | ||
| Environmental | -4 to +60° C operation; -30 to +100° C storage. Submersible to 200 meters (656.2 ft) |
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| Materials | 316SS | ||
| Mounting | Two no. 10 stainless steel mounting screws. | ||
| Housing Connector | 6-pin bulkhead, male plug | ||
| Cable | 6-conductor unshielded, 20AWG female receptacle with locking sleeve, neoprene jacket, 24” | ||
C820: 4-20mA Output
Performance Specifications
| High Gain | Standard | Wide Angle | |
| Angular Range (°) | ±0.5 | ±3.0 | ±50 |
| Resolution (°) | <0.0001 | 0.0006 | 0.01 |
| Repeatability (°) | <0.0002 | 0.001 | 0.02 |
| Non-linearity (%) | 1 | 2 | ½ span: 1 Full span: 2 |
| Scale Factor (°/mA) | 0.0625 | 0.375 | 6.25 |
| Time Constant | 0.15 sec | ||
| Kz Temperature Coefficient (°/C) | ±0.0002 | ±0.002 | |
| Ks Temperature Coefficient (%/°C) | <0.04 | <0.1 | |
| Output | 4-20mA Two-wire current loop (per axis) | ||
| Channels | Tilt, Temperature | ||
| Output Impedance (Ω) | 270 | ||
| Temperature Output | Temperature is measured with a 2500 Ohm thermistor, -50 to 150°C range | ||
| Power | (0.02 Ampere x R + 10 VDC) < Vs < 29 VDC | ||
| Environmental | -4 to +60° C operation; -30 to +100° C storage. Submersible to 200 meters (656.2 ft) |
||
| Materials | 316SS | ||
| Mounting | Two no. 10 stainless steel mounting screws. | ||
| Housing Connector | 6-pin bulkhead, male plug | ||
| Cable | 6-conductor unshielded, 20AWG female receptacle with locking sleeve, neoprene jacket, 24” | ||
D820: Digital Output
Performance Specifications
| High Gain | Standard | Wide Angle | |
| Angular Range (°) | ±0.5 | ±3.0 | ±50 |
| Resolution (°) | <0.0001 | 0.0001 | 0.002 |
| Repeatability (°) | 0.0003 | 0.0003 | 0.004 |
| Non-linearity (%) | 0.1 | 0.1 | 0.1 |
| Time Constant | 0.15 sec | ||
| Kz Temperature Coefficient (°/C) | ±0.0002 | ±0.002 | |
| Ks Temperature Coefficient (%/°C) | 0.04 | <0.1 | |
| Baud Rate | 9600 (default), 19200, 28800, 57600, 115200, 130400 | ||
| Output | RS-232, RS-422 | ||
| Output Format | NMEA XDR, Trimble TCM, Ashtec compatible, Simple (default: X, Y, Temp., S/N) | ||
| Channels | Tilt, Temperature, S/N | ||
| Temperature Output | 0.1°C/mV typical (single ended; 0°C = 0mV) |
||
| Power | 7-28 VDC @ 30mA, 250 mV ripple max, reverse polarity protected | ||
| Environmental | -4 to +60° C operation; -30 to +100° C storage. Submersible to 200 meters (656.2 ft) |
||
| Materials | 316SS | ||
| Mounting | Two no. 10 stainless steel mounting screws. | ||
| Housing Connector | 6-pin bulkhead, male plug | ||
| Cable | 6-conductor unshielded, 20AWG female receptacle with locking sleeve, neoprene jacket, 24” | ||
