Aquaread LeveLine Mini CTD Water Level

Aquaread LeveLine Mini CTD Water Level is a titanium water level, temperature, conductivity and salinity measuring sensor that has been specifically designed to bring conductivity and salinity measurements to your telemetric deployments.

The LeveLine-Mini-CTD is available in both absolute and gauge versions. If your chosen datalogger / telemetry device includes a built-in air pressure sensor, we recommend the absolute version as the logging device can utilise the air pressure reading for compensation. If an air pressure sensor is unavailable then the gauge version is best suited for telemetric logging.

Gauge sensors require vented cables and desiccant cartridges to remove any moisture from the vent to prevent blocking and inaccurate compensation.

Aquaread LeveLine Mini CTD Water Level Specifications

General

	LEVELINE – (Abs & Gauge)	LEVELINE – BARO	LEVELINE- MINI	LeveLine-CTD	LeveLine-Mini-CTD
Temperature ranges	Operational: -20-80° C (-4-176° F) Storage: -40-80° C (-40-176° F) Compensated: -20-80° C (-4-176° F)	Operational: -20-80° C (-4-176° F) Storage: -40-80° C (-40-176° F) Compensated: -20-80° C (-4-176° F)	Operational: -20-80° C (-4-176° F) Storage: -40-80° C (-40-176° F) Compensated: -20-80° C (-4-176° F)	Operational: -20-80° C (-4-176° F) Storage: -40-80° C (-40-176° F) Compensated: -20-80° C (-4-176° F)	Operational: -20-80° C (-4-176° F) Storage: -40-80° C (-40-176° F) Compensated: -20-80° C (-4-176° F)
Diameter	22.2mm (0.875 in)	22.2mm (0.875 in)	22.2mm (0.875 in)	22mm	22mm
Length	186mm (7.32 in)	186mm (7.32 in)	87mm (3.43 in)	260mm	146mm
Weight	150g (5.3oz)	160g (5.6oz)	120g (4.2oz)	250g	210g
Materials	Titanium body, Delrin nose cone	Stainless Steel body, Delrin nose cone	Stainless Steel body, Delrin nose cone	Titanium body, Delrin nose cone	Titanium body, Delrin nose cone
Output options	Modbus/RS485, SDI-12, Aquaread proprietary	Modbus/RS485, SDI-12, Aquaread proprietary	Modbus/RS485, SDI-12, Aquaread proprietary	Modbus/RS485, SDI-12, Aquaread proprietary	Modbus/RS485, SDI-12, Aquaread proprietary
Battery type & life	3.6V lithium; up to 10 years (see note 1)	3.6V lithium; up to 10 years (see note 1)	N/A	3.6V lithium; up to 10 years (see note 1)	N/A
External power	6 – 30 VDC	6 – 30 VDC	6 – 30 VDC	6 – 24 VDC	6 – 24 VDC

Memory

LEVELINE – (Abs & Gauge)	LEVELINE – BARO	LEVELINE- MINI	LeveLine-CTD	LeveLine-Mini-CTD
Size	8.0 MB	2.0 MB	N/A	8.0 MB	N/A
Data records	500,000	150,000	N/A	500,000	N/A
Log types	Linear, Event & User-Selectable Schedule with Future Start, Future Stop, Deploy Start and Real Time View	Linear, Event & User-Selectable Schedule with Future Start, Future Stop, Deploy Start and Real Time View	N/A	Linear, Event & User-Selectable Schedule with Future Start, Future Stop, Deploy Start and Real Time View	N/A
Fastest logging rate & Modbus rate	10 per second	1 per minute (logging) 5 per second (Modbus)	10 per second (Modbus Rate)	1 per second	1 per second
Fastest SDI-12 output rate	1 per second	1 per second	1 per second	1 per second	1 per second
Real-time clock	Accurate to 1 second/24-hr period (± 6 minutes/year)	Accurate to 1 second/24-hr period (± 6 minutes/year)	N/A	Accurate to 1 second/24-hr period (± 6 minutes/year)	N/A

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Sensor

	LEVELINE – (Abs & Gauge)	LEVELINE – BARO	LEVELINE- MINI	LeveLine-CTD	LeveLine-Mini-CTD
Type / Material	Piezoresistive; ceramic	Piezoresistive; ceramic	Piezoresistive; ceramic	Piezoresistive; ceramic	Piezoresistive; ceramic
Range (Absolute)	10.0m (32.8 ft), 20.0m (65.6 ft), 50.0m (164 ft), 100m (326 ft), 200m (656 ft)	0 to 16.7 psi; 0 to 1.15 bar	10.0m (32.8 ft), 20.0m (65.6 ft), 50.0m (164 ft), 100m (326 ft), 200m (656 ft)	10.0M (32.8 ft), 50.0M (164 ft), 20.0M (65.6 ft), 100M (326 ft)	10.0M (32.8 ft), 50.0M (164 ft), 20.0M (65.6 ft), 100M (326 ft)
Range (Gauge)	10.0m (32.8 ft), 20.0m (65.6 ft), 50.0m (164 ft), 100m (326 ft), 200m (656 ft)	N/A	N/A	10.0M (32.8 ft), 50.0M (164 ft), 20.0M (65.6 ft), 100M (326 ft)	10.0M (32.8 ft), 50.0M (164 ft), 20.0M (65.6 ft), 100M (326 ft)
Maximum pressure	Max 2x range, Burst 2.5x range	Max 2x range, Burst 2.5x range	Max 2x range, Burst 2.5x range	Max 2x range, Burst 2.5x range	Max 2x range, Burst 2.5x range
Accuracy (FS) (see note 3)	±0.05% FS	±0.1% FS	±0.05% FS	±0.05% FS	±0.05% FS
Accuracy (FS) (See note 2)	±0.1% FS	±0.2% FS	±0.1% FS	±0.1% FS	±0.1% FS
Resolution	0.005% FS or 1mm whichever is greater	0.1mb	0.005% FS or 1mm whichever is greater	0.002% FS or 1mm whichever is greater	0.002% FS or 1mm whichever is greater
Units of measure	Pressure: psi, kPa, bar, mbar, mmHg, inHg, cmH2O, inH2O, Level: in, ft, mm, cm, m	Pressure: psi, kPa, bar, mbar, mmHg, inHg, cmH2O, inH2O	Pressure: psi, kPa, bar, mbar, mmHg, inHg, cmH2O, inH2O, Level: in, ft, mm, cm, m	Pressure: mbar (psi, kPa, bar, mbar, mmHg, inHg, cmH2O, inH2O, Level: in, ft, mm, cm and m available in LeveLink	Pressure: mbar (psi, kPa, bar, mbar, mmHg, inHg, cmH2O, inH2O, Level: in, ft, mm, cm and m available in LeveLink

Electrical Conductivity

	LEVELINE – (Abs & Gauge)	LEVELINE – BARO	LEVELINE- MINI	LeveLine-CTD	LeveLine-Mini-CTD
Range	N/A	N/A	N/A	0 – 200mS/cm (0 – 200,000µS/cm)	0 – 200mS/cm (0 – 200,000µS/cm)
Resolution	N/A	N/A	N/A	1µS	1µS
Accuracy	N/A	N/A	N/A	± 1% reading or ±1µS whichever is greater (see note 5)	± 1% reading or ±1µS whichever is greater (see note 5)

Salinity (note 4)

	LEVELINE – (Abs & Gauge)	LEVELINE – BARO	LEVELINE- MINI	LeveLine-CTD	LeveLine-Mini-CTD
Range	N/A	N/A	N/A	0 – 70 PSU / 0 – 70 ppt (g/Kg)	0 – 70 PSU / 0 – 70 ppt (g/Kg)
Resolution	N/A	N/A	N/A	0.01PSU / 0.01 ppt	0.01PSU / 0.01 ppt
Accuracy	N/A	N/A	N/A	±1% reading or ± 0.1 unit if greater	±1% reading or ± 0.1 unit if greater

Temperature Sensor

	LEVELINE – (Abs & Gauge)	LEVELINE – BARO	LEVELINE- MINI	LeveLine-CTD	LeveLine-Mini-CTD
Accuracy Resolution	±0.1° C 0.01° C	±0.1° C 0.01° C	±0.1° C 0.01° C	±0.1° C; 0.01° C	±0.1° C; 0.01° C
Units of measure	Celsius	Celsius	Celsius	Celsius (fahrenheit available in LeveLink)	Celsius (fahrenheit available in LeveLink)

Warranty

	LEVELINE – (Abs & Gauge)	LEVELINE – BARO	LEVELINE- MINI	LeveLine-CTD	LeveLine-Mini-CTD
Standard	N/A	N/A	N/A	2 years	2 years
Extended	N/A	N/A	N/A	Options Available	Options Available

Notes: 1) Dependent on logging rate. 2) Across factory-calibrated pressure range at a constant temperature. 3) Across factory-calibrated pressure and temperature ranges. 4) Readings calculated from EC and temperature values. 5) At the calibration point at 25°C

Reference : aquaread.com