The main difference is that the WxDux has no built-in network capability, and must be connected to a host PC running its supplied client software via a serial port, whereas the WxGoos contains a built-in Web server and Ethernet port which allows it to connect directly to the network and produce a web page without any need for an external host PC or client software.
The WxGoos also has five RJ-12 jacks for connecting external Dallas Semiconductor 1-Wire sensors, and can support a maximum of 16 such sensors; the WxDux can potentially support a larger number of sensors, but only has a single RJ-12 jack.

Analog Sensors:

Door Sensors

Water Presence

Occupancy Sensor

Current Transformer

Serial Bus Sensors:

Temperature

Air Flow & Temperature

Power Egg

In the WxDux, the data are logged every minute into an Excel spreadsheet file. Each month the old file is dated and closed, and a new one created

In the WxGoos-1, WxGoos-2, and WxGoos-3, data are recorded at a user-set time interval and recorded to RAM on the built-in server. The server sends this data to a DataFlash memory chip each time 1Kb of data has been recorded.

It is a more descriptive name for the device, generally the location of a remote temperature sensor, or the type and location of an IO sensor. To change a friendly name edit the text and select save changes.

SNMP is the Simple Network Management Protocol. It provides a way for network devices to communicate. In the protocol there is a manager device that uses SNMP to find out the status of devices on the network. These devices are called agents. Normally, the manager makes a request to an agent, and the agent responds to this request. For example the manager asks the Goose for its temperature, the unit reads the temperature and sends this back to the manager. The exception to this is SNMP traps. A trap is an alert sent by an agent to the manager about some abnormal condition. For instance, if the temperature on the unit leaves an acceptable range, the Goose can send an SNMP trap to the manager.

To telnet into out products you need to be running a machine with a Windows OS, or if using unix press control + enter.

All current IT Watchdogs climate monitoring equipment has three analog inputs, with the exception of the MiniGoose.

These are 0 to 5 volts DC analog inputs with built-in loop current (provided through a 100K ohm pull-up resistor). Typical applications are magnetic door sensors, occupancy sensors, liquid sensors (conductance), or any other sensor using a dry-contact switch (no power supplied by switch). The 0-5V input voltages are scaled to a reading of 0 - 100 in the Weather Duck and WxGoos. 

For analog signal sensing,  a relatively low-impedance (<10K ohm) source is needed to overcome the pull-up resistor.  For applications requiring higher-impedance sensing, a command can be sent  to the WxDux -- but not to the WxGoos -- to disable the pull-up voltage.  (see help menu in WxDux by keying lower case "h").

These are general-purpose analog signal-input ports. The most common use is door-position sensing with magnetic door sensors. Other devices which are commonly used with these ports include water sensors, smoke alarms, and current transducers. The ports have an input voltage range of 0 - 5VDC; in addition, a weak pull-up is provided on each input, allowing the ports to measure passive devices such as dry-contact switches.

To connect devices to the ports of the WxDux and the older WxGoos-1s, the analog ports are screw-type terminal blocks. Use a small flat-blade screwdriver to open each terminal, insert the sensor wire into the terminal underneath the screw, then tighten the screw again to grip the wire into place. On the newer-style WxGoos-1 and WxGoos-2 units, the terminals are of a spring-loaded type; insert a small flat-blade into the top part of the port to be opened, pry upwards to push the spring-loaded terminal open, then insert the wire. When you remove the screwdriver, the spring-loaded terminal will automatically grip the wire.

These jacks are actually RJ-12 ports. The RJ-12 has six conductors while phone jacks will have either two or four. All of the sensors, except the RTAF and RTAFH, can operate with a four-conductor RJ-11 connector. (The RTAF/RTAFH devices require additional power to operate, which is delivered via the extra two conductors on the full 6-wire RJ-12 jack.) The devices attached to these jacks use the Dallas Semiconductors 1-wire serial protocol. Each sensor has a built-in 64 bit unique address. The devices, which are wired in parallel, can have an aggregate cable length of up to 1000 ft. (300m). The WxGoos-1 and WxGoos-2 have 5 jacks, while the WxDux and the MiniGoose (WxGoos-3) have only one. The WxGoos can have up to 16 devices on the 1-wire bus via the use of appropriate splitters; the WxDux can potentially support dozens of sensors, subject to the aggregate wire-length limit.

The digital sensors are wired in parallel using four-conductor wire or six wires in remote airflows(RTAF RTAFH), typically using telephone splitter blocks or hub connection blocks.

We found that most people working in IT positions have a Cat 3 crimper and a box of RJ-11 connectors. Also most people are familiar with the operation of such a connector.

It should be able to monitor 100 ducks and geese.

The load is minimal.

Yes.

If your power load is approaching the limit, the breaker could trip and bring down the entire cabinet full of equipment. The CT can spare IT managers midnight or weekend trips to the office to reset breakers by letting them know if they are operating near the limit.

Not reliably. The current consumed varies widely depending on how many accessories are installed and is generally the maximum the unit is rated for.

An electrician powers the equipment down, inserts a break-out box and reads the current using a clamp-on ammeter. This costs about $65 per power strip and causes about 30 minutes of down time.

Power usage changes substantially as equipment is added and removed. One additional piece of equipment could put the breaker right up against the trip point.

In AC circuits, loads that are not purely resistive can cause voltage and current to be out of phase. This causes the apparent power (which you are billed for) to be greater than the actual power used. This can be corrected by adding reactance to a system to make it purely resistive. Such measures, however, are generally reserved for large scale operations.

Apparent power is the calculation of watts times amps which is mathematically equivalent to current squared times impedance. Real power current squared times the resistive component of your load's impedance.

The acronym means Root-Mean-Squared. This means the DC voltage which would generate the same heat in a resistor as the AC voltage you have. The usefulness is that you know the actual power being consumed and not an estimate as in peak-to-peak calculations. RMS takes much more computing power but is more useful.

Peaks are troublesome because they trip surge protectors and you come to work with power-down servers and wonder why. The graphs will show peaks coming and going as a trend.

Yes, the unit e-mails or pages you if you set up the alarms properly. Some units have audible alarms.

Watch the graphs. One user had chronic server shutdowns in the early morning hours. The graphs showed a morning power sag caused brownout conditions and server shutdown.

You will see the voltage and current of each phase. You can easily balance the phases when you know what each power strip is using.

Power changes. Voltage sags and peaks. The graphs tell the story. Taking occasional readings doesn't show trends.