Sensors

Onset's battery-powered data loggers and weather stations utilize both internal and external sensors to measure a wide range of parameters. Our list of external sensors are below. You can Search and Compare all our loggers and sensors using our search or compare tool or view our complete price list.

Measurements:

Questions? Call an Applications Specialist at 1-800-564-4377 or chat with us live now.

Product

Features

Compatible Loggers

Links

Price

4-20mA [top]

VIA - Analog Input Adapter for U30 loggers

	Inputs: 2 channels - User configured as 0-20mA or 0-20VDC
	Sensor Power: Switched 12 VDC, up to 50 mA: user-selectable warm-up from 5 milliseconds to 2 minutes
	Accuracy: +/- 0.25% full scale
	NOTE: this option is chosen during configuration of the U30 logger

$89

4-20mA Cable for HOBO U-series and Z-series loggers

Can be plugged directly into the external input jacks of U12 and ZW Family loggers to expand the range of measurement options and applications.

$25

12-bit 4-20mA Input Adapter

	Range: 4-20 mA
	Accuracy: ±40 �A ±0.3% of reading

$85

FlexSmart Analog Module

	2 channels
	Range: 0-20mA, 0-20VDC
	Accuracy: ±0.25% FS over range selected from 50mV to FS A/D ±0.05%

$89

AC Current [top]

E50B2 Power & Energy Meter

	Range: 90-600VAC - Wye or Delta configurations
	Accuracy: ANSI 12.20 0.5% accuracy, IEC 62053-22 Class 0.5S
	Compatible with CTs from 5 to 32000A (333mV output)
	Bright backlit LCD
	UL listed, CE, California CSI Solar, ANSI C12.20

$599

Split-core AC Current Sensors

	Range: 0-600 Amps
	Accuracy: ±5.0% of full scale w/H8 ±4.5% of full scale w/U12

$90 - $115

Split-core AC Current Transformers

	Range: 0-600 Amps
	Accuracy: ±1% (from 10% to 130% of rated current)

$55 - $65

FlexSmart TRMS Modules

	Range: 5mV to 512mV input
	Accuracy: ±0.3% of reading ±0.5% FSR

$95 - $105

AC Voltage [top]

E50B2 Power & Energy Meter

	Range: 90-600VAC - Wye or Delta configurations
	Accuracy: ANSI 12.20 0.5% accuracy, IEC 62053-22 Class 0.5S
	Compatible with CTs from 5 to 32000A (333mV output)
	Bright backlit LCD
	UL listed, CE, California CSI Solar, ANSI C12.20

$599

FlexSmart TRMS Module

	Range: 5mV to 512mV input
	Accuracy: ±0.3% of reading ±0.5% FSR

$95

Volt AC Transmitters

	Range: 0-300 volts RMS
	Accuracy: ±0.1% of span (20% to 120% of range) ±0.25% of span (10% of range)

$139

Volt AC Potential Transformers

	Range: 150 Volts AC - 600 Volts AC
	Accuracy: ±1% (from 10% to 130% of rated voltage)

$79

Acceleration [top]

No standalone sensor - see our
HOBO® G Logger

	Range: ± 3G
	Accuracy: ± 2.5% FS @ 25°C (77°F)

N/A

$75

Air Velocity [top]

Air Velocity Sensors by Degree Controls, Inc.

	Range: 0.15 to 10 m/s (30 to 1969 fpm)
	Accuracy: Greater of 10% of reading or +/- 0.05 m/s or 1% full-scale
	NOTE: requires FlexSmart Analog Module pictured above if used with H22-001 or analog input (VIA option) with any U30 logger

$235 - $319

Amp Hour (Ah) [top]

E50B2 Power & Energy Meter

	Range: 90-600VAC - Wye or Delta configurations
	Accuracy: ANSI 12.20 0.5% accuracy, IEC 62053-22 Class 0.5S
	Compatible with CTs from 5 to 32000A (333mV output)
	Bright backlit LCD
	UL listed, CE, California CSI Solar, ANSI C12.20

$599

Carbon Dioxide [top]

FlexSmart Analog Module

	2 channels
	Range: 0-20mA, 0-20VDC
	Accuracy: ±0.25% FS over range selected from 50mV to FS A/D ±0.05%

$89

Accuracy:
CO2 (sensor only): ±50 parts per million (ppm) or ±5% of reading, whichever is greater

$465

Conductivity [top]

No standalone sensor - this parameter measured with these loggers:

starting at $699

Compressed Air Flow [top]

Compressed Air Flow Meters

	Range: 1-350 SCFM
	Accuracy: calibrated range: 5% of reading plus 1% of F.S. between 40 and 120 F
	NOTE: requires FlexSmart Analog Module pictured above if used with H22-001 or analog input (VIA option) with any U30 logger

$495 - $629

DC Current [top]

FlexSmart Analog Module

	2 channels
	Range: 0-20mA, 0-20VDC
	Accuracy: ±0.25% FS over range selected from 50mV to FS A/D ±0.05%

$89

DC Current Transducer

	Range: 0 to 200Amps DC (selectable 0-50, 0-100, 0-200)
	Accuracy: +/- 0.5A F.S.
	NOTE: requires FlexSmart Analog Module pictured above if used with H22-001 or analog input (VIA option) with any U30 logger

$205

Bi-Polar DC Current Transducer

	Range: -200 to 200 Amps DC
	Accuracy: +/- 0.5A F.S.
	NOTE: requires FlexSmart Analog Module pictured above if used with H22-001 or analog input (VIA option) with any U30 logger

$229

DC Voltage [top]

VIA - Analog Input Adapter for U30 loggers

	Inputs: 2 channels - User configured as 0-20mA or 0-20VDC
	Sensor Power: Switched 12 VDC, up to 50 mA: user-selectable warm-up from 5 milliseconds to 2 minutes
	Accuracy: +/- 0.25% full scale
	NOTE: this option is chosen during configuration of the U30 logger

$89

Cable 2.5 Stereo

	Range: 0-20mA, 0-2.5VdC 0 to 2.5 VdC w/U12 0 to 2.5 VdC w/H8
	Accuracy: ±2 mV; ±2.5 % of absolute reading w/U12 10 mV ±3% of reading w/H8

$9

CABLE-ADAP5

	Range: 0 to 5 VDC
	Accuracy: ±2 mV; ±2.5 % of absolute reading

$12

CABLE-ADAP10

	Range: 0 to 10 VDC
	Accuracy: ±2 mV; ±2.5 % of absolute reading

$12

FlexSmart Analog Module

	2 channels
	Range: 0-20mA, 0-20VDC
	Accuracy: ±0.25% FS over range selected from 50mV to FS A/D ±0.05%

$89

FlexSmart TRMS Module

	2 channels
	Range: 5mV to 512mV input
	Accuracy: ±0.3% of reading ±0.5% FSR

$105

12-bit Voltage Input Adapter

	Range: 0-5 V DC
	Accuracy: ±10mV ±0.3% of reading (over operating temp range)

$75

Event [top]

No standalone sensor - this parameter measured with these loggers:

N/A

N/A

N/A

starting at $95

Kilowatt Hours (kWh) [top]

E50B2 Power & Energy Meter

	Range: 90-600VAC - Wye or Delta configurations
	Accuracy: ANSI 12.20 0.5% accuracy, IEC 62053-22 Class 0.5S
	Compatible with CTs from 5 to 32000A (333mV output)
	Bright backlit LCD
	UL listed, CE, California CSI Solar, ANSI C12.20

$599

Veris kWh Transducers

	Range: 0-800 Amp
	Accuracy: ±1% (3-phase model per ANSI C12.1
	NOTE: requires use of a S-UCC pulse input adapter.

$642 - $849

WattNode kWh Transducers

	Range: 120V - 480V
	Accuracy: 1.5% to 4% of reading (dependent on CT used and line variation)
	NOTE: requires use of a S-UCC pulse input adapter.

$270 - $295

Kilowatts (kW) [top]

E50B2 Power & Energy Meter

	Range: 90-600VAC - Wye or Delta configurations
	Accuracy: ANSI 12.20 0.5% accuracy, IEC 62053-22 Class 0.5S
	Compatible with CTs from 5 to 32000A (333mV output)
	Bright backlit LCD
	UL listed, CE, California CSI Solar, ANSI C12.20

$599

FlexSmart Analog Module

	2 channels
	Range: 0-20mA, 0-20VDC
	Accuracy: ±0.25% FS over range selected from 50mV to FS A/D ±0.05%

$89

Veris kW Transducer

	480 vac, 1-100 amps
	Accuracy: ±1% per ANSI (C12.1) (from 10 to 100% of CT rating)

$815

Leaf Wetness [top]

Leaf Wetness Smart Sensor

Range: 0 (dry) to 100% (wet)

$110

Light Intensity [top]

Photosynthetic Light (PAR)

	Smart Sensor with 3m cable
	Range: 0 to 2500 umol/m2/sec, wavelengths of 400 to 700 nm
	Accuracy: ±5 umol/m2/sec

$220

Solar Radiation Sensor

	Silicon Pyranometer
	Range: 0 to 1280 W/m2
	Accuracy: ±10 W/m2

$210

Light On/Off [top]

No standalone sensor - this parameter measured with these loggers:

N/A

N/A

N/A

starting at $75

Motor On/Off [top]

AC Current Switch

Range: 1.25 to 50A

$85

Power Factor (PF) [top]

E50B2 Power & Energy Meter

	Range: 90-600VAC - Wye or Delta configurations
	Accuracy: ANSI 12.20 0.5% accuracy, IEC 62053-22 Class 0.5S
	Compatible with CTs from 5 to 32000A (333mV output)
	Bright backlit LCD
	UL listed, CE, California CSI Solar, ANSI C12.20

$599

Pressure - Barometric [top]

HWS Barometric Pressure Sensor

	Range: 660 mb to 1070 mb (19.47 to 31.55 inHg)
	Accuracy: ±3.0 mbar (0.088 in. Hg) over full pressure range at 25°C (77°F)

$135

Barometric Pressure Smart Sensor

	Range: 660 mb to 1070 mb (19.47 to 31.55 inHg)
	Accuracy: ±3.0 mbar (0.088 in. Hg) over full pressure range at 25°C (77°F)

$249

Pressure - Differential [top]

FlexSmart Analog Module

	2 channels
	Range: 0-20mA, 0-20VDC
	Accuracy: ±0.25% FS over range selected from 50mV to FS A/D ±0.05%

$89

Veris Differential Air Pressure Sensors

	Range: User selectable: 0.1; 0.25; 0.50; 1.0; 2.5; 5.0; 10.0 "WC (inches of water column)
	Accuracy: +/- 1% F.S. of selected range

$195

Pressure - Gauge [top]

Ashcroft Gauge Pressure Sensors

	Range: 100, 200, 500 psig
	Compensated temp: -40° to 125°C (-40° to 257°F)
	Accuracy: ±1% FS ±1% FS from -20° to 85°C (-4° to 185°F) ±1.5% FS -40° to -20°C and 85° to 125°C (-40° to -4°F and 185° to 257°F)

$190

Pulse [top]

This parameter can measured with these loggers:

N/A

N/A

N/A

starting at $195

Electronic Switch Pulse Input Adapter

Range: 120 Hz (120 pulses per second)

$75

Contact Closure Pulse Input Adapter

Range: 2 Hz (2 pulses per second)

$75

Rainfall [top]

Rain Gauge Smart Sensors

	Range: 0-10 cm or 0-5 in. per hour
	Accuracy: ±1% FS ±1.0% at up to 20 mm or 1" per hour

$410

Reactive Power (VAR) [top]

E50B2 Power & Energy Meter

	Range: 90-600VAC - Wye or Delta configurations
	Accuracy: ANSI 12.20 0.5% accuracy, IEC 62053-22 Class 0.5S
	Compatible with CTs from 5 to 32000A (333mV output)
	Bright backlit LCD
	UL listed, CE, California CSI Solar, ANSI C12.20

$599

Relative Humidity [top]

12 bit Temp/RH Smart Sensors

	Range: RH: 0 to 100% between 0° to 50°C (32° to 122°F)Temp: -40° to 75°C (-40° to 167°F) - RH: 0 to 100% at -40° to 75°C (-40° to 167°F)
	Accuracy Temp/RH: 0.2°C over 0° to 50°C (0.36°F over 32° to 122°F); ±2.5% from 10 to 90%

$185-$195

Vaisala Duct-mount RH/Temp Transmitter

	Range: RH: 10 to 90% temp: -10° to 60°C (14° to 140°F)
	Accuracy: ±3% RH

$299

Soil Moisture [top]

Soil Moisture Sensors

	Range: 0 to 100% volumetric water content (m^3/m^3)
	Accuracy: soil moisture: 3.1% (m^3/m^3)

$139

Wireless Soil Moisture Sensor

	Range: 0 to 100% volumetric water content (m^3/m^3)
	Accuracy: soil moisture: 3.1% (m^3/m^3)

N/A

$230

State Open/Closed [top]

No standalone sensor - this parameter measured with these loggers:

starting at $85

Temperature [top]

12 bit Temp Smart Sensors

	Range: -40° to 100°C (-40° to 212°F) sensor tip
	Accuracy: < ± 0.2°C from 0° to 50°C (< ±0.36°F from 32° to 122°F)

$95-$120

Temp Sensors

	Range: -40° to 100°C (-40° to 212°F)
	Accuracy: ±0.7°C at 20°C (±1.3°C at 68°F)

$50-$99

Wireless Temp Sensor

	Range: -40 to +100C
	Accuracy: 0.22C from 0 to 50C

N/A

$179

Thermocouple Sensors

	Range: -200C to 900C
	Accuracy: ±1.0°C (±1.8°F) to ±2.2°C (±4°F) ±0.75%

$19-$39

12 bit Temp/RH Smart Sensors

	Range: RH: 0 to 100% between 0° to 50°C (32° to 122°F)Temp: -40° to 75°C (-40° to 167°F) - RH: 0 to 100% at -40° to 75°C (-40° to 167°F)
	Accuracy Temp/RH: 0.2°C over 0° to 50°C (0.36°F over 32° to 122°F); ±2.5% from 10 to 90%

$185-$195

Vaisala Duct-mount RH/Temp Transmitter

	Range: RH: 10 to 90% temp: -10° to 60°C (14° to 140°F)
	Accuracy: ±3% RH

$299

Air/Water/Soil Temp Sensors

	Range:-40° to 50°C (-40° to 122°F) in water or soil -40° to 100°C (-40° to 212°F) in air
	Accuracy: w/H8 ±0.5° at 20°C (±0.9° at 68°F) w/U12 ±0.25° at 20°C (±0.45° at 68°F)

$29-$79

Tilt [top]

No standalone sensor - see our
HOBO� G Logger

	Range: ± 3G
	Accuracy: ± 2.5% FS @ 25°C (77°F)

N/A

$75

Volatile Organic Compound (VOC) [top]

Volatile Organic Compound (VOC) Sensor

	Range: Three user selectable: 0-10, 0-100, 0-1000 ppm (parts per million)
	Accuracy: 2% at lower range, 5% at other mid and high ranges
	NOTE: requires FlexSmart Analog Module pictured above if used with H22-001 or analog input (VIA option) with any U30 logger

$2,995

Volt-Amp Reactive Hour (VARh) [top]

E50B2 Power & Energy Meter

	Range: 90-600VAC - Wye or Delta configurations
	Accuracy: ANSI 12.20 0.5% accuracy, IEC 62053-22 Class 0.5S
	Compatible with CTs from 5 to 32000A (333mV output)
	Bright backlit LCD
	UL listed, CE, California CSI Solar, ANSI C12.20

$599

Volt-Amps [top]

E50B2 Power & Energy Meter

	Range: 90-600VAC - Wye or Delta configurations
	Accuracy: ANSI 12.20 0.5% accuracy, IEC 62053-22 Class 0.5S
	Compatible with CTs from 5 to 32000A (333mV output)
	Bright backlit LCD
	UL listed, CE, California CSI Solar, ANSI C12.20

$599

Water Flow [top]

Water Flow Meter Sensor

	Range: 0 to 22 gpm (gallon per minute)
	Accuracy: 0.25 - 1 gpm
	Resolution: 1 pulse = 1 gal

$105

Water Level [top]

No standalone sensor - this parameter measured with these water level loggers:

starting at $495

Watt Hours (Wh) [top]

E50B2 Power & Energy Meter

	Range: 90-600VAC - Wye or Delta configurations
	Accuracy: ANSI 12.20 0.5% accuracy, IEC 62053-22 Class 0.5S
	Compatible with CTs from 5 to 32000A (333mV output)
	Bright backlit LCD
	UL listed, CE, California CSI Solar, ANSI C12.20

$599

Watts (W) [top]

E50B2 Power & Energy Meter

	Range: 90-600VAC - Wye or Delta configurations
	Accuracy: ANSI 12.20 0.5% accuracy, IEC 62053-22 Class 0.5S
	Compatible with CTs from 5 to 32000A (333mV output)
	Bright backlit LCD
	UL listed, CE, California CSI Solar, ANSI C12.20

$599

Wind [top]

Wind Speed and Direction Smart Sensor Kit

	Range: Speed - 0 to 44 m/s (0 to 99 mph) Direction - 0 to 358°, 2° dead band
	Accuracy: ±3% RH Speed - Greater of ±0.5 m/s (1.1 mph) Direction - ±5°

$560

Wind Speed Smart Sensor

	Range: 0 to 45 m/s (0 to 100 mph)
	Accuracy: ±1.1 m/s (2.4 mph) or ±4% of reading whichever is greater

$239

Wind Direction Smart Sensor

	Range: 0 to 45 m/s (0 to 100 mph)
	Accuracy: ±1.1 m/s (2.4 mph) or ±4% of reading whichever is greater

$350

R.M. Young Wind Speed/Direction Adapters

	Range - Speed: '0 to 52 m/s (0 to 116 mph)
	Range - Direction: 0 to 358 degrees
	Resolution - Speed: 0.25 m/s (0.55 mph)
	Resolution - Direction: 1.4 degrees

$150

Onset Computer Corporation has been producing data loggers for over 30 years. Our battery-powered “HOBO” data logger products measure and record temperature, humidity, light, energy, and a variety of other parameters.

Known for providing reliable, accurate data under tough environmental conditions, HOBO data loggers can be rapidly deployed in a range of monitoring applications, from measuring building energy performance to water and field ecology studies.

Onset values your privacy. Click here to read our privacy statement.