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The Level TROLL^® contains everything needed for water level measurement and data logging--level and temperature sensors, a data logger, internal power in a 18.3mm (0.72 in) diameter housing with a lot of exciting new capabilities. Since it is built entirely from rugged titanium that is welded to eliminate o-ring seals, you can have total confidence in all applications, even marine environments. The Level TROLL^® is the easiest way to monitor level ever!

With the Level TROLL^®, you'll discover perfect connections with our new Twist-Lock connectors. And, they are extendable--an industry first! Forget having to change batteries. Our new super low-power system guarantees long-term operation plus the unit can be powered with external power. System integration is easy with built-in RS-485/232 Modbus, SDI-12, and 4-20mA communication capability. Are you ready to monitor level with absolute confidence? Try the new Level TROLL^®!

Applications:

• River, lake, stream gaging
• Landslide & flood prevention
• Stormwater monitoring
• Flow measurements
• Research, studies
• Marine buoys
• Water pumping management
• Estuaries and coastal monitoring
• Long-term groundwater monitoring
• Water resource management, dams
• Landfill & industrial water levels
• Combined sewer overflow (CSO)
• Mine sites
• Wetland monitoring
• Remeditation, brownfields
• Construction dewatering
• Watershed drainage basin monitoring
• Soil vapor extraction (SVE)

Features & Benefits:

• Ultra-rugged, all-titanium design – Perfect for fresh and marine water monitoring. No more worries about corrosion. Excellent for marine, brackish and acidic sites.
• Super accurate sensors – record minute changes in water level and temperature.
• TIG-welded seals – Prevents flooding of instrument.
• Ultra-low power system guarantees 5 years or 2-million readings – Forget changing batteries or running out of power.
• Uses external battery or line power – no worries about running out of power.
• RS-485 MODBUS, SDI-12, and 4-20mA – provides for easy connections to existing and online systems
• Twist-Lock connectors that “lock” tight – 100% reliability
• Halogen-free cables (LSZH rated) – no worries of toxic fumes if submitted to fire
• Sealed desiccant options – allow for barometric compensation for maximum accuracy while preventing water & humidity intrusion
• Extend cables by simply adding additional segments – maximizes your investment and maintain flexibility with your unit.
• -20 to 80ºC temperature range – useful for geothermal and hot spring research and monitoring
• Easiest ever Win-Situ^® software – get the data you need fast! Large, sizable display that’s easy to see from a distance.
• Linear logging – perfect for long-term monitoring
• Pause logging feature – Pause logging when removing a unit. Reinstall and restart where you left off!
• Specify start and stop times for logging – collect the data you need up to the date you want and no more
• Ability to “undelete” files from the unit – no worries of accidentally deleting your data.
• Data saved by sites not files – collect and save information by site automatically. No need to transfer data later.
• Easy-to-read memory and battery gauges – know exactly how much is left
• Friendly Wizards guide every step – reduces complicated steps and the need for tedious manuals
• Submersible ranges up to 351m / cable length up to 1200m – measure to the depth you need.
• FCC and CE emission tested – prevents susceptibility to outside emission interference and transient electrical surges
• Version, range, and manufacturing info printed on side of the unit – know the details of the unit without opening the software. Reduces accidental over pressuring

Click here for more details on the Level TROLL^®

General
Operating temperature range		-20 to 80°C
Dimensions		18.3 mm (0.72 in) OD, 21.6cm (8.5 in) long
Weight (includes hanger)		0.197 kg (0.43 lb)
Output options		Modbus (RS-485/232), SDI-12, 4-20mA
Housing material		Titanium
Nose cone material		Black Delrin®
Power
Internal battery		3.6V Lithium
Typical life*		5 yrs or 2-million readings
External power		8-36VDC
		*Whichever comes first. See battery guide for details.
Logging
Memory / data points**		2 MB / 100,000+
Logging Rate		User selectable from 0.5 sec -- 49 days
Modbus		0.5 sec
SDI-12		0.5 sec
Measurement Types		Linear, Fast Linear, Event
		**data point = time and date plus one parameter logged
Level Sensor		Silicon strain gauge
Type		Vented or non-vented
Material		Titanium
Accuracy, FS***		+/-0.05% (15C)
FS = Full Scale		+/-0.1% (-5 to 50C)
		+/-0.25% (-20 to -5C & 50 to 80C)
		*** Accuracy with 4-20mA output option: +/-0.25% typical
Resolution		0.005% FS or better
Range		Vented: 3.5 m, 11.5 ft (34.4 kPa, 5 psi) 11 m, 35 ft (103.4 kPa, 15 psi) 21 m, 69 ft (206.8 kPa, 30 psi) 70 m, 231 ft (689.5 kPa, 100 psi) 211 m, 692 ft (2068 kPa, 300 psi) 351 m, 1153 ft (3446 kPa, 500 psi)
		Non-vented: 10.9 m, 35.8 ft (206.8 kPa, 30 psi) 60.1 m, 197.3 ft (689.5 kPa, 100 psi) 200.7 m, 658.7 ft (2068 kPa, 300 psi) 341.3 m, 1120 ft (3446 kPa, 500 psi)
		Note: subtract barometric pressure to obtain usable range
Temperature Sensor
Material		Silicon
Accuracy		+/-0.1°C
Resolution		0.01°C or better
Range		-20° to 80C° (-4° to 176°F). Temperature compensated: -5° to 50°C (23° to 122° F)
RuggedCable® with Twist-Lock Connectors
Connector		Twist-Lock connector OR stripped & tinned wire
Number of conductors		6
Internal Conductor Material		Polypropylene
Diameter 6.7mm (0.265 in)		Break strength 127 kg (280 lbs)
Bend Radius		2X diameter of cable = 13.72mm / 0.54 in
Cable Types:
		Vented or Non-Vented Polyurethane
		Vented or Non-Vented Halogen-Free Polyurethane - LSZH rated
		Vented FEP (Generic Teflon®)

Minimum System Requirements: 400MHz Pentium^® II, 128MB RAM, 100MB free disk space, Internet Explorer^® 5.0 or higher, and Windows^® 2000 Professional SP2 or better

Download In-Situ^® Modbus Networking Specifications | www.modbus.org