Échantillonneur de profondeur d'eau

Water Quality with Vernier has 18 water quality tests, including pH, total dissolved solids, dissolved oxygen, BOD, flow rate, turbidity, nitrates, and phosphates. All nine tests in the Water Quality Index (WQI) are supported. A comprehensive introduction is included for each test, providing important background information for the students. The printed version includes access to the electronic edition online.  

The Conductivity Probe determines the ionic content of an aqueous solution by measuring its conductivity. The Conductivity Probe has three ranges, providing optimal precision in any given range. Biology teachers can use this probe to demonstrate diffusion of ions through membranes. Chemistry students are able to quickly investigate the difference between ionic and molecular compounds, strong and weak acids, or ionic compounds that yield different ratios of ions. Environmental science students use it to measure TDS, total dissolved solids. Range: Low Range: 0 to 200 μS/cm (0 to 100 mg/L TDS) Mid Range: 0 to 2000 μS/cm (0 to 1000 mg/L TDS) High Range: 0 to 20,000 μS/cm (0 to 10,000 mg/L TDS) Typical Resolution: Low Range: 0.1 μS/cm (0.05 mg/L TDS) Mid Range: 1 μS/cm (0.5 mg/L TDS) High Range 10 μS/cm (5 mg/L TDS) Accuracy using factory calibration: ±8% of full-scale reading for low range ±3% of full-scale reading for mid range ±4% of full-scale reading for high range Accuracy using custom calibration: ±2% of full-scale reading for each range Response Time: 98% of full-scale reading in 5 seconds, 100% of full-scale in 15 seconds Temperature Compensation: automatic from 5 to 35 °C Temperature Range (can be placed in): 0 to 80 °C Cell Constant: 1.0 cm-1   Description: ABS body, parallel carbon (graphite) electrodes Dimensions: 12 mm OD and 150 mm length CON-BTA User manual

The Go Direct Conductivity Probe determines the ionic content of an aqueous solution by measuring its electrical conductivity. It directly connects wirelessly via Bluetooth® or wired via USB to your platform. Go Direct Conductivity Probe determines the ionic content of an aqueous solution by measuring its electrical conductivity. It features a built-in temperature sensor to simultaneously read conductivity and temperature. Automatic temperature compensation allows students to calibrate the probe in the lab and then make measurements outdoors without temperature changes affecting data. This temperature compensation can be turned off to perform conductivity studies as a function of temperature. The Go Direct Conductivity Probe has a range of 0 to 20,000 μS/cm to provide optimal precision in any given range. An alternating current at its electrodes prevents polarization and electrolysis, reducing contamination of solutions. Its ABS-body graphite electrode resists the corrosion typical in metal electrodes. The Go Direct Conductivity Probe can be used in a variety of experiments: Demonstrate diffusion of ions through membranes. Investigate the difference between ionic and molecular compounds, strong and weak acids, or ionic compounds that yield different ratios of ions. Measure Total Dissolved Solids (TDS). Specifications: Range: 0 to 20,000 μS/cm (0 to 10,000 mg/L TDS) Temperature compensation: Automatic from 5 to 35°C, can be turned off Temperature range (can be placed in): 0 to 80°C Cell constant: 1.0 cm-1 Description: ABS body, parallel carbon (graphite) electrodes Dimensions: 12 mm OD and 120 mm length Connections: Wireless: Bluetooth Wired: USB Included Go Direct Conductivity Probe Micro USB Cable

Le pH-mètre est constitué d’une électrode Ag-AgCl gel et de son amplificateur. Il peut être utilisé pour toutes les expériences de pH-métrie en chimie ou biologie. Il possède de la mémoire pour stocker des étalonnages qui seront automatiquement utilisés par le logiciel. Cela permet d'utiliser un étalonnage propre à chaque capteur sans avoir besoin de réétalonner à chaque utilisation. Un amplificateur d'électrode peut être acheté séparément pour connecter une autre électrode. Electrode AG-AgCl gel Mesure des pH de 0 à 14 Temps de réponse : 90% de la valeur finale en 1 seconde Protection en epoxy sur le corps de l’électrode Fonctionne de 5 à 80°C Résolution avec CBL/CBL2: 0,02 unités pH Résolution avec LabPro, LabQuest: 0,005 unités pH pH isopotentiel : pH 7 (point auquel la température n'a pas d'effet sur la sortie) Sortie : 59.2 mV/pH à 25°C Mémoire pour stocker les étalonnages   Garantie 5 ans

The Go Direct pH Sensor is a general-purpose pH sensor used to monitor pH of aqueous solutions. It directly connects wirelessly via Bluetooth® or wired via USB to your platform. The Go Direct pH Sensor is an important and versatile sensor for lab and field activities alike. It gives students the freedom to explore pH without the inconvenience of wires—no more spilled solutions or dangling wires. The Go Direct pH transmits live readings and captures data in real-time. The Go Direct pH Sensor can be used in a variety of experiments: Conduct acid-base titrations. Monitor pH change during chemical reactions. Test the pH and alkalinity of bodies of water. Investigate household acids and bases. This sensor is comprised of a pH electrode connected to a Go Direct Electrode Amplifier via a BNC connector. This design enables you to use the Go Direct Electrode Amplifier with other Vernier electrodes, such as the Flat pH Electrode, ORP Electrode, ISE electrode, or a third-party electrode. Specification: pH range: 0–14 Type: Sealed, gel-filled, epoxy body, Ag/AgCl reference Shaft diameter: 12 mm OD Storage solution: pH-4/KCl solution (10 g KCl in 100 mL buffer pH-4 solution) Connections: Wireless: Bluetooth Wired: USB Included: Go Direct pH (includes Go Direct Electrode Amplifier) Micro USB Cable Quick-start guide 

La sonde optique à oxygène dissous Go Direct combine la puissance de plusieurs capteurs pour mesurer l'oxygène dissous, la température de l'eau et la pression atmosphérique. Idéale pour les expériences en biologie, en écologie et en sciences de l'environnement, la sonde optique à oxygène dissous Go Direct utilise la technologie de la luminescence pour fournir des résultats rapides, faciles et précis. Parfaite pour le terrain ou pour le laboratoire, cette sonde ne nécessite ni étalonnage, ni solution de remplissage, ni temps de réchauffement, ni agitation. Cette sonde étanche est prête à prélever l'oxygène dissous immédiatement sans installation supplémentaire ni réchauffement, ce qui permet de consacrer plus de temps à l'enquête en classe. La sonde optique à oxygène dissous Go Direct peut être utilisée dans une variété d'expériences: Étudier la relation entre la température et l'oxygène dissous dans l'eau. Mesurer la productivité primaire ou la demande biologique/biochimique en oxygène. Explorez l'interdépendance des plantes et des animaux. Surveiller les bassins versants au fil du temps.