YSI YAP188 Alkalinity Total Replacement Reagent Photometer Test Kit, 0 to 500 (CaCO3) Range (Pack of 250 tests)

Extech 407026 Light Meter

Amprobe LM-100 Light Meter with Silicon Photodiode and Filter

Extech HD450 Datalogging Heavy Duty Light Meter

eXact 486757 Micro Chloride/Salt III Strip for Photometers

Lutron LX-1108 Electronic Light Meter/Light Intencity Meter/Lux Meter/Brightness Meter/Work Place

Sper Scientific 840022 Advanced Light Meter

Humboldt H4200F Adapter Foot to Soil Penetrometer, Measures Low-Stength Cohesive Soils

Actopus Speaker Phase Meter Polarity Tester PH Phasemeter for Auto Car Audio

Solarmeter Model 9.2 Bilirubin Light Meter - Measures 422-499nm with Range from 0-1999 µW/cm² Blue Light

Solarmeter Model 6.5R Reptile UV Index Meter, ABS Polymer, Black

Industrial Test Systems eXact 486699-K Micro 10 Photometer Standard Kit, 525nm Wavelength, 20mm Cell Pathlength

UV Light Pen | Sper Scientific

Indstrial Test Systems eXact 486202 Spa EZ Photometer

eXact iDip Photometer 486107 570 Smart Photometer

Digi-Sense Data Logging Light Meter with NIST Traceable Calibration

Solarmeter Model 6.4 Vitamin D3 UV Meter - Measures 280-400nm with Range from 0-1999 IU/Minute

Superdental TPC LM300 Digital Light Meter Light Cure Power Curing Tester

Humboldt H-4200 Stainless Steel Soil Pocket Penetrometer; 0 to 4.5 tons per sq. ft

Hanna Instruments HI96728 Nitrate Portable Photometer with Sample Cuvettes, 7-19/32" Length x 4-3/32" Width x 2-11/16" Height, 0.0 - 30.0mg/L, 0.1mg/L Resolution, 9V Battery

YSI YAP189 Potassium Replacement Reagent Photometer Test Kit, 0 to 12 Range (Pack of 250 tests)

Sper Scientific 840020C Lux and Foot-Candles Light Meter

UVP 95-0104-01 Model UVM-57 Handheld 6 Watt UV Lamp, 302nm Wavelength, 115V

REED Instruments R1930 Light Meter, Compact Series

AEMC CA813 PEAK Function Lightmeter, 200,000 lux Range, 0.01 lux Resolution, +/-3% Accuracy

Solarmeter Model 8.0 UVC Meter - Measures 254 +/-8nm with Range from 0-1999 µW/cm² UVC

Industrial Test Systems eXact 486205 Chlorine Plus EZ

YSI YAP188 Alkalinity Total Replacement Reagent Photometer Test Kit, 0 to 500 (CaCO3) Range (Pack of 250 tests)

Industrial Test Systems eXact 486641-II Micro Total Alkalinity Strip for Photometers

Light Meter Digital Illuminance Meter Measure Light 0~200,000 Lux (0~18500 FC) Handheld Foot Candle Meter Luxmeter MAX/MIN/Data Hold Backlight LCD Display lumens Meter for Plant led Light Auto shutoff

YSI 9300 Economical Photometer with Hard Sided Carrying Case, 10-51/64" Length x 5-51/64" Width x 3" Height, 0.001 AU Resolution, LCD Display, 3x AA Batteries

Apogee Instruments Affordable MQ-100 Compact PAR Meter with Original Quantum Sensor

AMTAST UV340B UV Light Meter UVA & UVB Light Measure Tester, 290~390nm

REED Instruments R8140 LED Light Meter

Hanna Instruments HI96717 High Range Phosphate Portable Photometer with Sample Cuvettes, 7-19/32" Length x 4-3/32" Width x 2-11/16" Height, 0.00-30.0mg/L, 0.1mg/L Resolution, 9V Battery

Extech 407026 Light Meter