Industrial Level Control Division
Level controllers, switches and transmitters,
designed specifically for harsh industrial applications,
including caustic and chemical solutions for liquid and solid measurement.
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Australian
Distributors of
WaterLOG® high precision environmental products for water & weather measurement.
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WaterLOG® DH21
Submersible Pressure Transducer and Data Logger
Specifications (page 1)
Sensor Specifications
Accuracy
(Maximum percent of error in measurement)
| Pressure: |
Better than ± 0.03% of full scale output
(FSO) over temperature range referenced to a straight line stretched from zero psi to maximum pressure.
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| Temperature: |
Internal temperature ±1°C over
temperature range.
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A/D Resolution
(Smallest change detectable in output signal)
| Pressure: |
1 part in 250,000 (0.0004%) |
| Temperature: |
1 part in 250,000 (0.0004%) |
Output Resolution (Displayed)
| Pressure: |
0.0001 psi |
| Temperature: |
0.01°C |
Linearity
Less than 0.02% deviation from a straight line referenced to
end points.
Pressure Hysteresis
Less than 0.03% of FSO.
Long-term Stability
Accuracy drift is less than ± 0.05% of FSO per year.
Standard Pressure Ranges
| Pressure |
Depth |
Accuracy |
| 0 to 15 psi |
0 to 34.60 feet |
± 0.01 feet |
| 0 to 30 psi |
0 to 69.20 feet |
± 0.02 feet |
Pressure Overload:
Up to 2 times the rated pressure.
Custom Calibration Ranges Available
0 to 5 psi - 0 to 100 psi
Environmental Restrictions
| Operating Range: |
0 to 60°C (nonfreezing) |
| Compensated Range: |
0 to 40°C |
| Storage: |
-10 to 70°C |
| Extended Range: |
Consult Factory |
Media Compatibility
Liquids and gases compatible with PVC, Polyethylene,
Stainless Steel and Ethylene Propylene.
Pressure Port
Stainless steel screen with 149 micron filter, field replaceable.
Logger Specifications
Communications Interface
Stored data is extracted via an RS-232 or
RS-485 connection at 9600 baud, 8-bit with no parity, 1 stop bit.
Memory Capacity
| Memory: |
128 Kbytes Nonvolatile Flash Memory
(43,688 Data Points typical *) |
| Upgrade: |
to 512 Kbytes
(174,752 data points typical *) |
| User Notes: |
160 ASCII characters |
* logging date, time, pressure and temperature
Logging Modes
| Time Linear: |
Programmable from 1 second to 24 hours. |
| Linear D: |
Logs on 1-second to 24-hour intervals.
Logs data dependent on a change specified by user.
This mode conserves memory. |
| Linear Hyper: |
Logs on 1-second to 24-hour intervals. In
this mode important events are captured. Data is collected at up to 256 times the normal
logging rate when a user defined rate of change is exceeded. |
| Linear Hyper D: |
Logs on 1-second to 24-hour intervals.
This mode minimizes memory use and prolongs battery life by adjusting the logging rate
as defined by user entered rate of change. |
| Variable: |
Allows user to define
Logarithmic/Variable logging intervals, 6 user definable
intervals. (Ideal for well testing and other applications.) |
Zero Offset Command
Allows user to set offset to zero either at zero pressure or at
a datum or reference point.
WaterLOG® DH21 Introduction
WaterLOG® DH21 Specifications Page 1
WaterLOG® DH21 Specifications Page 2
Download PDF File (397kb)
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DH21 Introduction
Specifications Page 1
Specifications Page 2
Download PDF File (397kb)
Environmental Management products and instruments for water quality, water quantity and water control.
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