[{"sku":"LI-190R","title":"LI-COR LI-190R Quantum Sensor, Bare Lead","subtitle":"Photosynthetically active radiation (PAR) measurement precision\u2014no matter the source","variant_product_name":"Quantum Sensor, Bare Leads, 50 Meter Cable","unit_price":"470.00","brands":["HOBO"],"region":null,"service_plans":[],"parcel_length":"13.00","parcel_width":"12.00","parcel_height":"5.00","parcel_weight":"4.00","sellable":true,"published":true,"product_page_url":"\/products\/sensors\/li-190r","nid":"23156","product_description":"<p>The LI-190R measures Photosynthetically Active Radiation (PAR, in \u00b5mol of photons m-2&nbsp;s-1). It provides accurate measurements\u2014in the open, in greenhouses, under plant canopies, or in growth chambers\u2014for most broad-spectrum light sources, including natural sunlight, artificial, or mixed sources.<\/p><p>Plants use light in the wavelength range from about 400 to 700 nm to drive photosynthesis. The efficiency with which plants use light varies somewhat across this range, but McCree1&nbsp;showed that measuring PAR provided a consistent way to predict plant photosynthetic response regardless of the spectrum of the light source.2<\/p><h4>Why monitor PAR with a LI-190R?<\/h4><ul><li>Uniform sensitivity across the PAR waveband for accurate measurements outdoors, under vegetation, or in artificial lighting without changing the calibration<\/li><li>Newly designed optical filter tailors the spectral response to an unprecedented performance standard<\/li><li>Weather-resistant and durable in high-temperature, high-humidity, long-term deployments<\/li><li>Cosine correction is accurate even when the light source is not directly overhead<\/li><li>Sensor heads are detachable and interchangeable for simplified installation, removal, and recalibration<\/li><\/ul><p class=\"text-align-center\"><a class=\"secondary-button small\" href=\"https:\/\/www.licor.com\/products\/light\/quantum\" target=\"_blank\">Learn More&nbsp;<\/a><\/p><p class=\"p5\"><em><sup>1<\/sup>McCree, K.J., 1972. The action spectrum, absorptance and quantum yield of photosynthesis in crop plants. Agric. Meteorol. 9: 191-216.<\/em><\/p><p class=\"p5\"><em><sup>2<\/sup>McCree, K.J., 1972. Test of current definitions of photosynthetically active radiation against leaf photosynthesis data. Agric. Meteorol. 10: 443-45<\/em><\/p>","add_on_products":{"title":"Recommended Products","items":["2420-BL"]},"brand":"HOBO","compatible_items":{"Sensor Adapter":{"Analog_Input_Adapter":{"items":["RXMOD-A1","RXW-ANA","RXW-ANA-900","RXW-ANA-868","RXW-ANA-922","RXW-ANA-921","RXW-ANA","RXW-ANA-900","RXW-ANA-868","RXW-ANA-922","RXW-ANA-921"]},"Voltage_Input_Adapters":{"items":["2420-BL"]}},"Accessory":{"Mounting_Accessories":{"items":["2003S"]}}},"country":"US","environment":["Outdoor"],"important_information":"This sensor requires a LI-COR 2003S Mounting and Leveling Fixture, a 2420-BL Light Sensor Amplifier to convert \u03bcA current, and either the wireless Analog Mote (with HOBOnet Manager) or HOBOnet Analog Module for connection to the RX3000 remote monitoring station., basic_html","li_cor_product_category":["Light Measurements","Terrestrial Quantum Sensors"],"measurement":["PAR "],"not_a_sku":"0","page_type":"add-to-cart","parcel_status":"default","primary_measurement":"Light","product_family_series":"RX Family","features":"<p>&nbsp;<\/p><p>The LI-190R sensor features excellent cosine response, which ensures accurate measurements under diffuse light and when sunlight originates from a low solar angle. This, in combination with high resolution at low light levels, makes the LI-190R useful for determining the light compensation point in plants.<\/p><p>&nbsp;<\/p><p class=\"text-align-center\"><a class=\"small secondary-button\" href=\"https:\/\/www.licor.com\/products\/light\/science\" target=\"_blank\">Learn More About the Science Behind the Design<\/a><\/p>","product_information_tab":"290661, 2171311","specifications":[{"type":"Product Specifications","revision_default":"1","field_hide_in_compare":"0","field_hide_on_specs_tab":"0","field_specification_group_label":"BLANK","field_specification_items":[{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Absolute Calibration","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"\u00b1 5% traceable to the U.S. National Institute of Standards and Technology (NIST)"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Sensitivity","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"Typically 5 \u03bcA to 10 \u03bcA per 1,000 \u03bcmol s-1 m-2"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Linearity","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"Maximum deviation of 1% up to 10,000 \u03bcmol s-1 m-2"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Response Time","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"Less than 1\u03bcs (2 m cable terminated into a 604 Ohm load)"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Temperature Dependence","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"\u00b1 0.15% per \u00b0C maximum"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Cosine Correction","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"Cosine corrected up to 82\u00b0 angle of incidence"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Azimuth","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"< \u00b1 1% error over 360\u00b0 at a 45\u00b0 elevation"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Tilt","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"No error induced from orientation"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Operating Temperature Range","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"\u221240 \u00b0C to 65 \u00b0C"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Relative Humidity Range","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"0% to 100% RH, Non-Condensing"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Detector","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"High stability silicon photovoltaic detector (blue enhanced)"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Sensor Housing","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"Weatherproof anodized aluminum body with acrylic diffuser and stainless steel hardware; O-ring seal on the sensor base"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Size","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_measurement":[{"type":"Product Specification - Measurement","revision_default":"1","field_spec_imperial_value":"0.93\u201d diameter \u00d7 1.43\u201d","field_spec_metric_value":"2.36 cm diameter \u00d7 3.63 cm"}]}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Weight","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_value":"24 g head; 60 g base\/cable (2 m) with screws"}]},{"type":"Product Specifications - Item","revision_default":"1","field_specification_label":"Cable Length","field_specification_values":[{"type":"Product Specification - Value","revision_default":"1","field_specification_measurement":[{"type":"Product Specification - Measurement","revision_default":"1","field_spec_imperial_value":"6.5\u2019, 16.4\u2019, 49.2\u2019, 164\u2019","field_spec_metric_value":"2 m, 5 m, 15 m, 50 m"}]}]}]}],"product_status":"active","product_type":"Sensors","product_variants":{"variation_label":"Cable Length","items":[{"sku":"LI-190R-BL-2","title":"Quantum Sensor, Bare Leads, 2 Meter Cable","variation":"2 meters","variant_status":"active","price":"470.00","non_shippable":false},{"sku":"LI-190R-BL-5","title":"Quantum Sensor, Bare Leads, 5 Meter Cable","variation":"5 meters","variant_status":"active","price":"470.00","non_shippable":false},{"sku":"LI-190R-BL-15","title":"Quantum Sensor, Bare Leads, 15 Meter Cable","variation":"15 meters","variant_status":"active","price":"510.00","non_shippable":false},{"sku":"LI-190R-BL-50","title":"Quantum Sensor, Bare Leads, 50 Meter Cable","variation":"50 meters","variant_status":"active","price":"600.00","non_shippable":false}]},"related_resources":["HOBO\u00ae Mounting Accessories for LI-COR\u00ae Light Sensors Install Guide"],"search_keys":"LI-COR, light, PAR","warranty":"0","warranty_premium":"0","digital_item":"0"},[{"nid":"9081","uuid":"857dbe1d-e68b-4b42-9bcc-3b5b6f3cb2f7","vid":"9926","langcode":"und","revision_timestamp":"1645725811","status":"1","title":"Temperature Probe for HOBO\u00ae LCD Data Logger (L-TMx-M00x) User's Manual","created":"1193326442","changed":"1645725811","promote":"0","sticky":"0","default_langcode":"1","revision_default":"1","revision_translation_affected":"1","path":{"alias":"\/resources\/documentation\/5770-man-ltmx-m00x","pid":"17436","langcode":"und"},"archive_resource":"0","associated_products":["L-TMA-M006","L-TMB-M002"],"brand":"HOBO","documentation_files":{"English":"https:\/\/dev-d9.onsetcomp.com\/sites\/default\/files\/resources-documents\/5770-MAN-LTMx-M00x.pdf"},"documentation_hoboconnect":"0","documentation_id":"5770-MAN-LTMx-M00x","documentation_is_datasheet":"0","documentation_short_title":"L-TMA-M00x User's Manual","resource_type":"Documentation"}]]