H1QL Liquid Level Sensor Datasheet
Introduction
H1QL is an industrial-grade, fully calibrated digital pressure transducer; primarily designed to measure levels of liquids in tanks or level of open water. The solution offers a wide range of electrical connectivity options including RS485 and USB. The unit communicates using multiple protocol options. The unit offers multiple choices of physical connectors and can be used in a variety of environments.
Application
Liquid level sensor H1QL is designed for precision measurement of level of liquids inside tanks or containers or open water. The main measurement body is made from stainless steel, so any measured medium which does not react with stainless steel (DIN 1.4301) can be measured.
The sensor uses very sensitive probe to measure difference in atmospheric pressure and hydrostatic pressure in the tip of the probe. The sensor is fully calibrated and linearized.
Sensors are designed, assembled and tested in EU under full EU legislation.
Mechanical information
The transducer is enclosed in a robust stainless steel enclosure.
Technical parameters
| Type of measurement | liquid level (from pressure difference) |
| Maximum measurement range | 0 to 600 meters |
| Best measurement precision | 0.1% of measured range this combined precision accounts for non-linearity of measurement, hysteresis and repeatability |
| Long-term drift | |
| Recommended calibration frequency | once every two years |
| Measured medium temperature | -40 to 60C |
| Power supply | 5V - 28V DC |
| Communication | 4-20mA output; MODBUS RTU; SDI-12 |
| IP protection grade according to (IEC 60 529) EN 60 529 | IP 68 |
Software
Testing applications and SDK and integration tools are promptly available on request via info@moirelabs.com
Label description
Information included on the label:
- Manufacturer
- Full order code
- Measurement range and precision
- Serial number
- IP rating
Ordering
Order shall contain the following information:
- Date and reference order number
- Name and address of customer (including VAT number where appropriate)
- Order code assembled from order tables including number of units and requested delivery date
- Type of shipping
- Optional extras to include (for example calibration certificates)
Order code table
| Measurement range (M) | |
| M0 | 0 - 0.25m |
| M1 | 0 - 0.5m |
| M2 | 0 - 1m |
| M3 | 0 - 2m |
| M4 | 0 - 4m |
| M5 | 0 - 8m |
| M6 | 0 - 10m |
| M7 | 0 - 20m |
| M8 | 0 - 40m |
| M9 | 0 - 80m |
| M10 | 0 - 100m |
| M11 | 0 - 160m |
| M12 | 0 - 250m |
| M13 | 0 - 400m |
| M14 | 0 - 600m |
| MX | special - on request |
| Measurement precision (P) | |
| P0 | 0.1% |
| P1 | 0.25% |
| P2 | 0.4% |
| PX | special - on request |
| Variation (T) | |
| T0 | standard / typical |
| T1 | for potentially explosive atmospheres |
| TX | special - on request |
| Output type (W) | |
| W0 | 4-20mA |
| W1 | RS485 with MODBUS |
| WX | special - on request |
Packaging
Sensors are packed individually into padded cartons.
The packaging includes all information required for proper use and servicing of the equipment.
Installation
Physical installation of the sensor
The following tables show functionalities of the pins on the sensor side of the connection for different combinations of physical connectors and transciever types.
4-20mA output
red wire: positive
black wire: negative
Hirschmann CA3GS for RS485 (W1)
Hirschmann CA3GS (4pin) connector
| Pin | Function | Notes |
|---|---|---|
| 1 | VCC | Supply 3v3 DC to this pin |
| 2 | RS485: A | |
| 3 | RS485: B | |
| 4 | GND | Supply GND to this pin |
Hirschmann CA6LS for RS485 (W1)
Hirschmann CA6LS 7 pin connector
| Pin number | Function | Notes |
|---|---|---|
| 1 | VCC | Power supply to sensor - keep powered for autonomous measurements and archiving |
| 2 | GND | |
| 3 | RS485: A | |
| 4 | RS485: B | |
| 5 | keep not connected | |
| 6 | WAKEUP | Pulling low (to GND) wakes up the sensor for communication. Permanently wire to GND to disable sleep. |
| 7 | keep not connected |
MODBUS implementation
Default RS485 configuration: 38400 baud, 8N1 ( => 1 start bit, 8 data bits, 1 stop bit, no parity)
Default communication protocol: MODBUS - implementation information: ML MODBUS version 1
Design and manufacture
For support please contact your distributor or manufacturer directly via info@moirelabs.com