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The miniTROLL is the world's most advanced data logging probe. It is completely self-contained and features an internal data logger with a pressure/level and a temperature sensor . It is used by water professionals around the world to collect real-time information for analysis of both short- and long-term water level trends.

Features:

• Smallest diameter at only 0.72 inches (18.3mm)
• Powerful onboard data logger - up to 1MB (440,000 data points)
• Linear, linear average, logarithmic, and event logging modes
• User-replaceable AA batteries
• High quality vented Quick-Connect cable (FEP or Polyurethane) - Fully detachable!
• Ultimate 4-way level compensation including auto barometric compensation
• Vented cable, Direct-Read cables or suspension by low-cost wire
• Accuracy certified to NIST-traceable standards

- Smallest diameter at only 18.3mm (0.72")
- Rugged Industrial 316-Stainless Steel design
- Integrated Quick-Connect cable - fully detachable

EVERYTHING NEEDED IS IN ONE UNIT!]

	Sensors
	Data Logger
	Clock
	Power

Rugged Construction
The miniTROLL is the ultimate tool for short and long-term water level monitoring. It boasts the smallest diameter at only 18.3mm (0.72") and contains everything needed to monitor and record water level and temperature data!

miniTROLL System Components
The main body of the miniTROLL has unique features not found with competitor products. We will break the probe into three areas:

1. Sensor/Analog Electronics (Front)
2. Digital Electronics (Middle)
3. Power Management/Battery Compartment/Connector (Back)

	Internal data logging
	High accuracy real-time-clock
	±2 min/year over the operating temperature range.
	Networking and Smart Data Retrieval
	File System allowing Multiple Test Storage

Powerful data logging with 1MB of memory A powerful internal data logger is the key to real-time profiling and long-term monitoring. Up to 16 tests scheduled to run or stored Linear, Linear Average, Event and Log testing modes 0.5 second to 7 day user-selectable sampling rates Downloads only new data Non-volatile memory Up to 220,000 data points (level & temperature) based on version Comes standard with surge and lightening protection!

	Pressure/Level & Temperature sensors
	Cavity less than 1 mm from the fluid ports to the surface of the pressure sensor
	Factory serviceable nose and debris screen

Extreme Accuracy
Do you demand accuracy and precision?

All units pass extensive environmental testing Temperature Accuracy: ± 0.25ºC over entire range Resolution: 16-bit A-D converter Pressure Accuracy: ±0.1% over full pressure and temperature range, or 0.05% @ 15°C

Level readings are compensated for: Temperature from -5 to 50°C Fluid Density Gravitational Acceleration Barometric pressure (with vented cable)

Installation
Installation is easy--just place it in water!

The miniTROLL is easy to setup and install for:

	Long-term monitoring
	Short-term aquifer studies
	View data real-time!

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Optional

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220,000

16

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0.5

2

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3X

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TERMS OF INTEREST
Gauged (vented) Option. Automatically compensates for atmospheric changes:
Vent to atmosphere. Why? - Forces on both sides of the pressure transducer are equalized, providing a more accurate reading relative to ambient atmospheric pressure.

Compensate for Barometric Changes. Why? - As barometric pressure changes, water in an enclosed aquifer will rise and fall in response to the change. This phenomenon will introduce a margin of error in your readings if not compensated and primarily affects tests conducted in enclosed aquifers.

All of the electronics and sensors are completely self contained in the Gauged miniTROLL version. This configuration is exceptionally durable and made to withstand years of exposure to harsh downhole conditions. By using a tool with everything you need built in, it Increases Accuracy, and Reduces Time and Effort to merge barometric data reading corrections to get "True" water levels.

Absolute (non-vented) Option:
No Need to Compensate for barometric changes in some tests. Why? - When monitoring an open body of water, or a pressurized water column, there is no need to compensate for barometric pressure. In the open body of water, the affects of the change in barometric pressure are insignificant, relative to even the high accuracy recorded by the miniTROLL. When monitoring a pressurized water column, changes to outside atmospheric pressure will usually be of no significance to your test.

All of the electronics and sensors are completely self contained in the Absolute (non-vented) miniTROLL version. The Absolute miniTROLL may be suspended by either a stainless steel wire or direct-read cable option. This configuration is exceptionally durable and made to withstand years of exposure to harsh downhole conditions. By using a tool with everything you need built in, it Increases Accuracy and Reliability.

Direct readings
Don't need to remove unit from well to get readings. Why? - In many cases you will not want to disturb the transducer once you have started to take readings downhole. The Reliable, Watertight and Easy to Use direct-read cable option for the miniTROLL allows you to see everything the miniTROLL is detecting and recording with a simple twist of a connector at the wellhead. By utilizing the direct-read cable option to examine either real-time or recorded downhole data, your miniTROLL will remain in the exact same place as when you first positioned it. Your data will be far more accurate. Here are some more reasons to use the simple direct-read option for the miniTROLL:

• Readings may be offset upon reinstallment
• Unit may be contaminated and unwise to handle
• More chances for unit to snag in well
• Difficult to reposition
• Easy to collect data
• Can connect to telemetry systems / 3rd-party data loggers / Online / Automation

Wire Suspension (non-direct reading)
In some cases, you will want to suspend your Absolute (non-vented) miniTROLL by a thin stainless steel wire. You will want to employ this method when:

• Least Cost is an issue
• Very High Security is an issue
• Well contamination may prevent introduction of poly or FEP downhole cable.
• Longer term monitoring is being employed
• Atmospheric compensation is not an issue