How often do temperature data loggers need recalibration and/or servicing?

HOBO data loggers are manufactured using precision components. As long as the data loggers are not damaged or exposed to conditions outside of their operating environment, they should maintain their...

HOBO RX3000 Cable Channel Kit Assembly Installation

Learn how to install the RX3000 Cable Channel Kit

U30 and excitation wiring with S-VIA-CM14 modules

Here is a wiring diagram for use with external sensors and the S-VIA-CM14s. Remember the excitation current required to power the external sensors cannot exceed 50 milliamps total. http://www...

Wireline mounting a U20 water level data logger in a well

HOBO Water Level data loggers can be hung in wells using Onset's special low-stretch cable with Teflon coating, to avoid snagging and to make them easy to clean. Materials You may require one...

Wiring Diagram - HOBO RX3000 - RXMOD-A1 Voltage Input Logic Switch

Attached is a wiring diagram that shows how to monitor switch closures with an HOBO RX3000 via the optional RXMO

Adding or Removing Smart Sensors from a HOBO RX3000 Station

To add or remove smart sensors from a HOBO RX3000 station: 1. If the station is currently logging, press the Stop button to stop it. 2. Press the Connect button and wait for the station to...

Making beaded probes on a thermocouple wire

A thermocouple is a kind of battery made by joining two dissimilar metals together where a small voltage is generated by the difference between the metals. The voltage generated changes with...

How to reconfigure your S-FS-TRMSA-D Module for use with an RX3000 Station

See how to reconfigure your TRMS module for use with an RX3000

Wiring Diagram - Monitoring a 3-Phase Circuit with the HOBO RX3000 Station and T-VER-E50B2

Attached is a wiring diagram that shows you how to connect the T-VER-E50B2 Power and Energy Meter to the HOBO RX3000 Station. Note: The T-VER-E50B2 ouputs pulses representing Watt/hours,...

Calibrating ECH2O Soil Moisture Sensors Application Note

Onset adds smart sensor adapters to the ECH2O probes so that they are plug‐and‐play compatible with HOBO® U30 stations and HOBO Micro Stations. The S‐SMC‐M005 incorporates the EC‐5 and the S‐SMD‐M005...

Logging RH without Temp

The Bluetooth-enabled HOBO MX1101 and HOBO MX1102 loggers both use a Relative Humidity sensor that returns a temperature-compensated RH measurement. USB loggers, such as the HOBO UX100-03, use an...

Wiring Diagram - Monitoring Single-phase AC Current using the HOBO UX120-006M

Attached is a drawing that shows how to measure AC current through a line cord using the HOBO UX120-006M 4-channel Analog Input logger and a CTV-A current transformer. Note: This drawing is...