LogTag Accessories  

Humidity is a very difficult environmental variable to measure.  Sensors are susceptible to drift and contamination, and often require recalibration. 
When you are contemplating purchase of a humidity logger, trust Global Sensors to give you the best choices.  We perform calibrations on all of the humidity monitoring products we sell, and consequently have become experts in what loggers are just "OK" and which ones are really reliable and stable.

The LogTag Humidity logger is a solid example of the latter.  It is well designed, resistant to drift and contamination errors, and quite accurate.

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LogTag Humidity Logger (1)
A single LogTag Humidity Logger - pre-checked by Global Sensors.

Quantity discounts are available.  We will match or beat any Internet posted volume pricing for this unit.
Starter Kit (2+3)
Includes one interface unit with built-in USB cable and software disk.

HAXO-8 Temperature - Humidity Logger

The LogTag Humidity & Temperature Recorder measures and stores up to 8000 sets of high resolution humidity and temperature readings over 0 to 100% RH & -40°C to +85°C (-40°F to +185°F) measurement ranges. 

You can trust the HAXO-8 LogTag Humidity Logger in almost any rugged environment.  It has all of the superior features of the LogTag line, and brings state-of-the art humidity sensing to you in an affordable and compact package.

Using the LogTag Interface and LogTag Analyzer Software, you can control all aspects of performance, including delayed start, sampling interval, number of readings, continuous or fixed number of readings and configuration of conditions to activate the ALERT indicator. Readings are downloaded using LogTag Analyzer, which provides facilities for charting, zooming, listing data statistics and allows exporting the data to other applications such as MS Excel.  

We use a specialized micro-perforated stainless steel membrane to protect the sensor.  This is actually a very thin sheet of metal with extremely small holes punched through.  Water cannot pass through and contaminate the sensor element (a drop of water is actually harmful to most humidity sensors).  Despite the small holes, the sensor has no error or lag time in sensing humidity. 

Another significant enemy of delicate humidity sensing elements is fine dust.  The aperture size of the micro-perforations in the LogTag's protective screen are so small that dust cannot pass through.  The result of this protection (unique to LogTag) is a longer sensor life between recalibrations and better data.

We supply all units with a prior calibration checkup.  Ask us about our recalibration service.  Recalibration is essential for maintenance of humidity sensing accuracy.

Specifications  Product Sheet
Temperature Range  -40°C to +85°C  (-40°F to +185°F)             
Temperature Resolution < 0.1°C for -40°C to +40°C,  < 0.2°C for +40°C to +80°C
Temperature Accuracy All temperature humidity sensors must have a parallel temperature sensor at the position of the humidity sensor.  The normal LogTag sensor is different in kind and position from the sensor that is integral to the LogTag Humidity logger uses to sense humidity and has a different reading accuracy than a "non-humidity" LogTag.
Humidity Resolution 0.1% RH
Relative Humidity Accuracy

Accuracy is a function of the range of humidity sensing.  Best accuracy is obtained between 20% RH and 80% RH, as shown here. 
Humidity and temperature normal and maximum operating and storage conditions   This chart shows the normal recommended operating range of the humidity sensor. Conditions outside the normal recommended range may temporarily offset the RH signal up to ±3 %RH. After return to normal conditions it will slowly return towards calibration state by itself. Applying a “Reconditioning Procedure” may accelerate this process.  Prolonged exposure to extreme conditions may accelerate ageing.
Sensor Response Time T90 of less than 5 minutes in moving air
Stored Time-Temperature Readings 8032 readings (16K bytes memory)
Time Accuracy      Average 20 Seconds per Month
Logging Interval adjustable, 30 sec to several hours
Battery Type and Life 3V Lithium battery - Three years of use
Dimensions  8.6cm x 5.5cm x 0.86cm (L x W x H) 3³⁄₈" x 2¹⁄₈" x ⁄₁₆"
Unit Weight  35 gm (0.08 lb. or 1.23 oz.)
Case Dust and Water Resistance  IP61 (Note: The humidity sensor port is protected by a micro-perforated stainless steel screen that prevents bulk water passage)
Indicator Light Flashing 'OK' indicator | Flashing 'Alert' indicator
Case Material Polycarbonate (Case and face label are G.R.A.S. materials per USDA)
Basic Features

Logging start by push button or specific date/time start 
Optional clearing of alert indication by push button (places inspection make at same time).
Download inspection mark recorded in LogTag memory every time LogTag is downloaded.
'Prestart' fail-safe logging (records temperature data even if not started)
Low Battery indication in software
Alerts: preset absolute max and min, time over and under low and high presets
Calibration to achieve higher accuracy possible.

EMC Compliance Tested and complies with EC EMC directives (EN 50081-1:1992 & EN 61000-6-1:2001) 
FDA CFR21 Part 11 Competence Logger and Software systems are secure
RoHS Meets all international standards for compliance - documents available

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