LI-COR LI-192 Underwater PAR Sensor

The LI-COR LI-192 Underwater PAR Sensor accurately measures photosynthetically active radiation (PAR) in freshwater or saltwater environments.

Features

  • Uses computer-tailored filter glass to achieve the desired quantum response
  • Sensor is cosine corrected, and calibration is traceable to NIST
  • Features corrosion-resistant, rugged construction for use in up to 560m depths
List Price $$$$$
Your Price Check Price
Stock Check Availability  

Overview
The LI-192 Underwater Quantum Sensor measures PAR from all angles in one hemisphere. The LI-192 works in air or underwater at depths up to 560 meters. The measurements are cosine corrected and typically expressed as Photosynthetic Photon Flux Density (PPFD). For simultaneous measurements of downwelling and upwelling PAR, two sensors can be mounted on the 2009S Lowering Frame.

Measurement Principle
The LI-192 uses a silicon photodiode and a glass optical filter to create nearly uniform sensitivity to light between 400 and 700 nm, which closely corresponds to light used by most terrestrial and aquatic plants and algae. A precision optical filter blocks light with wavelengths beyond 700 nm, which is critical for measurements in a water column, where the ratio of infrared to visible light may be high.

  • Absolute Calibration: +/-5% in air traceable to NBS
  • Sensitivity: Typically 4 uA per 1000 umol s-1 m-2 in water
  • Linearity: Maximum deviation of 1% up to 10,000 μmol s-1 m-2
  • Stability:< +/-2% change over a 1 year period
  • Response Time: 10 us
  • Temperature Dependence: +/-0.15% per C maximum
  • Cosine Correction: Optimized for both underwater and atmospheric use
  • Azimuth:< +/-1% error over 360 degrees at 45 degree elevation
  • Detector: High stability silicon photovoltaic detector (blue enhanced)
  • Sensor Housing: Corrosion resistant metal with acrylic diffuser for both saltwater and freshwater applications
  • Waterproof: Withstands 800 psi pressure (560 meter depths)
  • Size: 3.18cm Dia. x 4.62cm H
  • Weight: 227g
  • Mounting: (3) 6-32 holes are tapped into the base for use with the 2009S Lowering Frame or other mounting devices
  • Cable: Requires 2222UWB Underwater Cable
Questions & Answers
Does this sensor include a cable?
Cables for the LI-COR Underwater PAR sensors are sold separately in lengths of 3m, 10m, 30m, 50m, and 100m. Please refer to the Accessories tab for more information.
Does this sensor come with a calibration certificate?
Yes, every LI-COR sensor ships with a factory calibration certificate.
Did you find what you were looking for?

Select Options

  Products 0 Item Selected
Image
Part #
Description
Price
Stock
Quantity
LI-COR LI-192 Underwater PAR Sensor
LI-192SA
LI-192 underwater PAR sensor with microamp output, requires underwater cable
Check Price
Check Availability  
  Accessories 0 Item Selected
Notice: At least 1 product is not available to purchase online
×
Multiple Products

have been added to your cart

There are items in your cart.

Cart Subtotal: $xxx.xx

Go to Checkout

In The News

A Happy Oyster is a Happy Tourist: Vester Field Station’s Monitoring Work on the Southwest Florida Coast

A clean environment doesn’t just mean improved biodiversity and fresher air. It also means increased real estate demand. That fact was cemented in 2015 after a Florida Realtor’s report tied hundreds of millions of property values to the Secchi disk depth of the surrounding water. The report was explicit about how important the environment was and how it should be treated as such. “Policymakers and the public would benefit from research into the possible effects of Everglades restoration on water quality in the estuaries of Martin and Lee Counties,” concluded the report.

Read More

LI-COR PAR sensors detect light waves to aid aquatic ecosystem research

Understanding how the sun’s rays fuel phytoplankton or plant growth may prove valuable to understanding an aquatic ecosystem. A pair of sensors from LI-COR can help researchers studying algal blooms and aquatic vegetation by measuring how much light enters underwater environments. Sitting below the surface, the LI-192 flat-lensed photosynthetically active radiation sensor and the LI-193 spherical PAR sensor measure light waves striking their silicon photovoltaic detectors.  They sense light wavelengths between 400 and 700 nanometers, which is the ideal range for photosynthesis. Dave Johnson, a LI-COR product manager for the LI-190 series, said the sensors’ individual designs make them ideal for different applications.

Read More

Applied Research and Innovative Solutions: Creating CHNGES at Western Kentucky University

Long-standing environmental monitoring programs have the power to support a large number of research initiatives and policy changes—however, actually starting these networks can prove challenging. Not only is starting the program difficult, but keeping things operational for decades to come has also been challenging for environmental professionals hoping to make an impact with applied research. Jason Polk, Professor of Environmental Geoscience and Director of the Center for Human GeoEnvironmental Studies (CHNGES) at Western Kentucky University, is all too familiar with this process.

Read More