HOBO U12 Temperature/Relative Humidity/Light/External Data Logger - U12-012

Qty.	1-9	10-99	100+
$US	$133	$123	$113

Printable Data Sheet

View all U12 data loggers

This product is an upgrade for:
H08-004-02 - Compare
and
H08-006-04 - Compare

Overview
Required Items
Sensors
Parts & Accessories

Overview

Description & Features

Detailed Specifications

Documentation

FAQs

Resources

The HOBO U12-012 accepts a wide range of energy and environmental sensors. It provides 12-bit resolution measurements for detecting greater variability in recorded data, and stores 43,000 measurements.

Features:

12-bit resolution provides high accuracy
Large memory for long-term deployments or fast sampling
Programmable and push button start
Direct USB interface for fast data offload
Compatible with Onset’s HOBO U-Shuttle for convenient data transport

Environment:

The U12-012 Data Logger is for use in Indoor environments

Measurements:

The U12-012 Data Logger supports the following measurements (some sensors sold separately): 4-20mA, AC Current, AC Voltage, Air Velocity, Carbon Dioxide, Compressed Air Flow, DC Current, DC Voltage, Gauge Pressure, Kilowatts (kW), Light Intensity, Relative Humidity, Temperature, Volatile Organic Compound

Measurement range:
Temperature: -20° to 70°C (-4° to 158°F)
RH: 5% to 95% RH
Light intensity: 1 to 3000 footcandles (lumens/ft2) typical; maximum value varies from 1500 to 4500 footcandles (lumens/ft2)
Analog channels:
0 to 2.5 Vdc (w/CABLE-2.5-STEREO); 0 to 5 Vdc (w/CABLE-ADAP5); 0 to 10 Vdc (w/ CABLE-ADAP10); 4-20 mA (w/CABLE-4-20MA)

Accuracy:
Temperature: ± 0.35°C from 0° to 50°C (± 0.63°F from 32° to 122°F), see Plot A
RH: ±2.5% from 10% to 90% RH (typical), to a maximum of ±3.5%, see Plot B
Light intensity: Designed for indoor measurement of relative light levels, see Plot D for light wavelength response
External input channel (see sensor manual): ± 2 mV ± 2.5% of absolute reading

Resolution:
Temperature: 0.03°C at 25°C (0.05°F at 77°F), see Plot A
RH: 0.03% RH

Sample Rate:
1 second to 18 hours, user selectable

Drift:
Temperature: 0.1°C/year (0.2°F/year)
RH: <1% per year typical; RH hysteresis 1%

Response time in airflow of 1 m/s (2.2 mph):
Temperature: 6 minutes, typical to 90%
RH: 1 minute, typical to 90%

Time accuracy: ± 1 minute per month at 25°C (77°F), see Plot C

Operating temperature:
Logging: -20° to 70°C (-4° to 158°F)
Launch/readout: 0° to 50°C (32° to 122°F), per USB specification

Battery life: 1 year typical use

Memory: 64K bytes (43,000 12-bit measurements)

Weight: 46 g (1.6 oz)

Dimensions: 58 x 74 x 22 mm (2.3 x 2.9 x 0.9 inches)

The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).

U12-012

U12-012 non-CE Compliant Manual

PDF
U12-012

U12-012 CE Compliant Manual

PDF

How do lumens/ft2 relate to Lux and Foot-candles?

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The two most popular scales for light measurement are Lux, which is the European measure, and Foot-candles, which is the U.S. scale.

View Full FAQ
Can I use my light intensity data logger outdoors?

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The HOBO HLI and the StowAway light intensity data loggers can be used outdoors, if they are placed in a waterproof container with desiccant packs.

View Full FAQ
What should I do if the data logger's internal board gets wet?

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If possible, remove the board from the case and the battery from the board. Dry the board completely using a hair dryer.

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I just bought a Data Logger. When I first plugged them into the USB port, a popup menu for Digital Signature concerning Microsoft asked if I wanted to continue: YES or NO. I said YES to all but one of them and now the computer won't recognize the logger.

[show/hide]

Open HOBOWare, plug the logger back in, then click on Start->Settings->Control Panel->System.

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Can the data be retrieved from a logger that is not communicating, or a logger that was accidentally re-launched prior to the data being downloaded?

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There are two common reasons for data loss: Relaunching a logger before the data has been saved Technical problem with the logger itself.

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I launched my data logger with "delayed start," but I noticed that logging began earlier than the time I entered. What happened?

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There is a small bug in early versions of the HOBO Water Temperature Pro data loggers that result in premature starting in some cases (when using the...

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How do i do a Quick Accuracy Check

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We receive many calls requesting information on how to calibrate our data loggers.

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The graph shows a random spike in the recorded data. What may have caused this?

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Spikes in the data file may be caused by rapid pressure changes or thermal shock (quick temperature changes). .

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I cannot communicate with my data logger.

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The Optic and Tidbit data loggers must be inserted into the Base Station in order for the computer to detect them; it will not detect the Base...

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My battery level seems to be going down quickly, what could be causing this?

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Check both the logging and the sampling interval to make sure they are greater than one-minute intervals.

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The datafile shows two more points than my testing did. Why?

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The first and last event on your datafile is a stamp of the start and end time.

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Can the data loggers be exposed to any type of chemical or chemical vapors?

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As a general rule, no.

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

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The CO data logger should be checked, at a minimum, on a yearly basis. Proper testing requires a CO testing chamber.

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What is the pin out for the 2.5 stereo input cable?

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Black (inner, end of 2.5mm jack near cable): is 0 volts White (outer, tip of 2.5mm jack): is the voltage input Red (middle): is the 2.

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What is the polarity of the 2.5 stereo input cable for voltage?

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Black = Ground White = Input Red = Switched .

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Why is my connection to the data loggers intermittent?

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For best performance, connect the USB cable directly to a port on your computer.

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What happens if my Keyspan USB server has a power interruption?

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If your Keyspan USB server has its power interrupted while you are running an alarm configuration, HOBOware will lose its connection to the data...

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Is the RH sensor user-replaceable?

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No. The U12 data loggers use a surface mount version of the sensor, which cannot be replaced by the customer. .

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How do I turn the data logger off?

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HOBO/StowAway data loggers shut off when the memory is full (unless wrap around is selected), or the data is downloaded to a computer.

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My data logger only recorded one data point, stops recording immediately after launch, or stopped recording prematurely.

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There are many situations that can cause a data logger to stop recording: 1.

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I cannot communicate with my HOBO Shuttle!

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Check to make sure that the batteries are still good. Follow the directions below for the model you have.

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What input does the external channel on the data logger accept?

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The external channels in the data logger accept the following Onset input cables: 0-2.5 volt DC or 4-20 mA, CT, temperature, and Telaire CO2 sensors.

View Full FAQ
How do I turn the data logger off?

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All HOBO and StowAway data loggers shut off when the memory is full (unless wrap around is selected), or the data is downloaded to a computer.

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What data loggers are supported by Real-Time Alarm Software?

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All U10 and U12 data loggers are fully compatible with the Real-Time Alarm Software.

View Full FAQ
The batteries in my data logger died while in use. Did I lose all of my data?

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No. The data is stored on non-volatile EEPROM. For data loggers with external batteries: change batteries and offload data, then relaunch normally.

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Do I need to rename the data file on the logging PC?

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You do not need to periodically rename or delete the data file on the logging PC because the file is automatically updated (e.g., test_1.txt, .

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What is the difference between ABS humidity, RH, Dew Point, and Uncompensated Humidity Measurement?

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BoxCar software gives you the ability to view humidity readings from different humidity data loggers as some or all of the following, dependent upon...

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Is there a shuttle available for the U12 data loggers?

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U-DT-1 .

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Can I use my light intensity data logger as an inexpensive light meter?

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No! These light intensity data loggers are designed to give you a general comparative idea of how much light there is in an area: sunlight v.

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How does HOBOware behave when a data logger has a low battery?

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When device battery power is very low interaction with HOBOware can be intermittent. .

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Can the U12 data loggers be used with a serial port?

[show/hide]

No. The U12 data loggers have a direct USB interface, and there is no equivalent USB to serial converter available to convert USB to RS-232. .

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The data logger is shutting off prematurely.

[show/hide]

A discharge of static electricity may cause a running data logger to stop recording.

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What does the CE stamp on the data logger mean?

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The CE mark identifies the product as complying with relevant directives in the European Union (EU). .

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What are the advantages of the U12 data loggers over the H8 data loggers?

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Critereon U12 H8 Resolution 12-bit 8-bit Memory 43K 8K Accuracy ± 1 minute a month ± 1 minute a week Extras push button start (except...

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I want to connect a 4-20mA external input to the external channel. How would I go about doing this?

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The 4-20mA cable (CABLE-4-20mA) measures currents from 0 to 20.1mA.

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How do I use a Telaire 7001 CO2 sensor in conjunction with the external channel on a data logger?

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The Telaire 7001 CO2 Monitor has been tested and used with the HOBO H8 and U12 family data loggers that have external sensor/voltage input...

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What is the input impedance of the U12 data logger?

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Here is a description of the input impedance characteristics of the HOBO U12 data loggers with external inputs.

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Can I use the indoor data loggers outdoors?

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No. These data loggers were manufactured for indoor use in non-condensing environments.

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I launched my U12 data logger; however, there is no data, only an event! Why?

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Most likely the channels were not enabled when the data logger was launched. .

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What probes can be used in water?

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Only the TMC-HD probes are designed for prolonged submersion in water or moist soil.

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Why is the TMCx-HB not listed on the U12 data sheet? Can I use it with the U12 data loggers?

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The TMCx-HB temperature sensors have a higher accuracy than the TMCx-HA when used with the H8s because they operate over a narrower range (i.e.

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I just placed a new battery in my data logger and it still will not connect.

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The TL-5186 lithium batteries build up an internal passive resistance over a period of non-use.

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What data loggers are supported by Real-Time Alarm Software?

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All U10 and U12 data loggers are fully compatible with the Real-Time Alarm Software.

View Full FAQ
What is a Data Logger?

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A data logger (or datalogger), commonly referred to as a 'HOBO', is an electronic instrument that records measurements (temperature, relative...

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How do I protect my data loggers from electrical discharge (ESD)?

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A discharge of static electricity may cause a running data logger to stop recording.

View Full FAQ

The following are associated resources for this product. In general users of this product can gain insight into its possible use by utilizing the resources below.

White Papers:

Required Items

Software

Graphing and Analysis

BHW-LITE-CD

HOBOware Lite Mac/Win - Use PART# BHW-LITE-CD if submitting a PO

1-9	10-99	100+
$45	$42	$40

BHW-PRO-CD

HOBOware Pro Mac/Win - Use PART# BHW-PRO-CD if submitting a PO

1-9	10-99	100+
$99	$92	$84

Sensors

Compatible Sensors

4-20 mA

CABLE-4-20MA

4-20 mA cable

CABLE-4-20MA No Image

1-9	10-99	100+
$25	$23	$21

AC Current

CTV-A

0 - 20 Amp split-core AC current sensor

1-9	10-99	100+
$90	$83	$76

CTV-B

0 - 50 Amp split-core AC current sensor

1-9	10-99	100+
$90	$83	$76

CTV-C

0 - 100 Amp split-core AC current sensor

1-9	10-99	100+
$90	$83	$76

CTV-D

0 - 200 Amp split-core AC current sensor

1-9	10-99	100+
$115	$106	$98

CTV-E

0 - 600 Amp split-core AC current sensor

1-9	10-99	100+
$115	$106	$98

AC Voltage

T-CON-ACT-150

ConLab 0-150 Volt AC Transmitter

1-9	10-99	100+
$139	$129	$118

T-CON-ACT-300

ConLab 0-300 Volt AC Transmitter

1-9	10-99	100+
$139	$129	$118

Air Velocity

T-DCI-F900-L-O

Air Velocity Sensor - .15 - 5 m/s (30 - 985 fpm)

1-9	10-99	100+
$319	$305	$289

T-DCI-F900-L-P

Air Velocity Sensor - 0.15 - 10 m/s (30 - 1969 fpm)

1-9	10-99	100+
$319	$305	$289

T-DCI-F900-S-O

Air Velocity Sensor - 0.15 - 5 m/s (30 - 985 fpm)

1-9	10-99	100+
$235	$223	$210

T-DCI-F900-S-P

Air Velocity Sensor - 0.15 - 10 m/s (30 - 1969 fpm)

1-9	10-99	100+
$235	$223	$210

Carbon Dioxide

TEL-7001

Telaire 7001 CO2 Sensor

The Telaire 7001 Monitors are out of Stock from the Manufacturer. Contact Sales @ 800-564-4377

Compressed Air Flow Meter

T-CDI-5200-10S

Compressed Air Flow Meter - 1 - 80 SCFM

1-9	10-99	100+
$495	$470	$445

1 week lead time required

T-CDI-5400-20S

Compressed Air Flow Meter - 3 - 350 SCFM

1-9	10-99	100+
$629	$595	$565

1 week lead time required

DC Amperage

T-VER-971BP-200

Split-Core Bi-Polar DC Transducer

1-4	5-24	25-49	50+
$229	$219	$206	$195

1 week lead time required

T-VER-H970-200

Split-Core 200A DC Transducer

1-4	5-24	25-49	50+
$205	$195	$185	$175

DC Voltage (0-2.5v, 5v, 10v)

CABLE-2.5-STEREO

Voltage Input Cable - 0-2.5 Vdc

1-9	10-99	100+
$9	$8	$8

CABLE-ADAP10

External input cable providing analog sensor input of 0-10 Vdc max.

1-9	10-99	100+
$12	$11	$10

CABLE-ADAP5

External input cable providing analog sensor input of 0-5 Vdc max.

1-9	10-99	100+
$12	$11	$10

Differential Air Pressure

T-VER-PXU-L

Differential Air Pressure Transducer

1-4	5-24	25-49	50+
$220	$209	$198	$187

T-VER-PXU-X

Differential Air Pressure Transducer

1-4	5-24	25-49	50+
$195	$185	$176	$166

Gauge Pressure

T-ASH-G2-100

Ashcroft Gauge Pressure Sensor/100-psig

1-4	5-24	25-49	50+
$190	$181	$171	$162

T-ASH-G2-200

Ashcroft Gauge Pressure Sensor/200-psig

1-4	5-24	25-49	50+
$190	$181	$171	$162

T-ASH-G2-500

Ashcroft Gauge Pressure Sensor/500-psig

1-4	5-24	25-49	50+
$190	$181	$171	$162

Power (kW)

T-VER-8044-100

Veris 480 V, 100 Amp Kilowatt Transducer

1-4	5-24	25-49	50+
$815	$774	$774	$774

Temperature

TMC1-HD

Air/Water/Soil Temp Sensor (1' cable)

1-9	10-99	100+
$32	$30	$27

TMC20-HD

Air/Water/Soil Temp Sensor (20' cable)

1-9	10-99	100+
$40	$37	$34

TMC50-HD

Air/Water/Soil Temp Sensor (50' cable)

1-9	10-99	100+
$45	$42	$38

TMC6-HC

Stainless Steel Temp Probe (6' cable)

1-9	10-99	100+
$79	$73	$67

TMC6-HD

Air/Water/Soil Temp Sensor (6' cable)

1-9	10-99	100+
$35	$32	$30

TMC6-HE

Temperature Sensor (6' Sensor)

1-9	10-99	100+
$35	$32	$30

VOC

T-ION-TVOC

Volatile Organic Compound (VOC) Sensor

1-9	10-99	100+
$2,995	$2,850	$2,850

1 week lead time required

Parts & Accessories

Accessories

NIST Certifications

NIST-SETUP

Setup Charge for NIST

Please call 1-800-564-4377 to place an order. NIST testing usually takes between 3-4 weeks.

(download sample certificate - PDF)

NIST-TEMP-POINT

NIST Temperature point certification

Please call 1-800-564-4377 to place an order. NIST testing usually takes between 3-4 weeks.

(download sample certificate - PDF)

Maintenance

Batteries

HRB-TEMP

Replacement batteries for several loggers (Box of 6)

1-9	10-99	100+
$15	$14	$13

Communications

Connection Cables

CABLE-USBMB

USB Cable

1-9	10-99	100+
$10	$9	$8

Ethernet Server

SERVER-US-4

Ethernet Server for HOBO U-series loggers

The SERVER-US-4 has been discontinued.

Please use the Silex SX-3000GB.

Data Offload - Base Stations - Shuttles

U-DT-1

HOBO® U-Shuttle

1-9	10-99	100+
$260	$240	$221

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HOBO U12 Temperature/Relative Humidity/Light/External Data Logger - U12-012

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