$20 - $25

411-0018-039 Last-O-More Tubing 5x8 mm per Meter by WatchGas

Regarding sampling tubes for gas detectors, many manufacturers promote clear tubing as a cost-effective solution for drawing air from confined spaces. While affordability may be a key selling point, it's essential to recognize the limitations of clear tubing in gas detection.

In the automotive industry, clear tubing is avoided for crucial systems like fuel and windshield fluids because it lacks the necessary inertness. The same principle applies to gas detection. Some argue that clear tubing offers two benefits: it allows visibility of fluid intake, and discoloration signals the need for replacement. However, once a fluid is drawn into the tube, contamination of the inner walls occurs, requiring immediate replacement. Best practices call for avoiding fluid intake altogether, which is why devices like ball floats are used—visible, such as the yellow one pictured.

Discoloration of clear tubing often points to a reaction between the sampled gases and the tubing material itself, proving the material's unsuitability rather than providing a reliable replacement indicator.

Inexpensive aquarium tubing made from PVC is commonly repurposed for gas detection, but PVC's inherent odour is a clear sign it's not suitable. While there are other, more promising materials—such as those with Teflon inner linings—these are no longer cheap, and Teflon can flake, causing blockages.

That's why we developed Last-O-More tubing, made from fluorinated elastomer (rubber). It's inert, doesn't flake, is highly flexible, and resists binding. Plus, it's explicitly marked as a gas sampling tube to ensure correct use.

While not the cheapest option, Last-O-More tubing has been rigorously tested in the lab using GC analysis. It has proven to be the best in absorption and retention—retention, meaning the release of absorbed gases when exposed to heat (like sunlight).

Last-O-More tubing is black, so always pair it with a ball float or water trap (filter) and replace it when it no longer feels slippery. Proper tubing is critical in gas detection—don't compromise safety.

323 Calibratable Water Resistant Digital Pocket Thermometer with Chisel Tip by Test Products International

TPI's Pocket Digital Thermometers measure temperatures accurately and affordably. All "C" Version Pocket Digital Thermometers can be field calibrated in 32°F ice water to ±2°F!

Features

• Field calibrateable to ±2°F
• Easy-to-read LCD
• Data Hold for hard to reach areas
• Penetration tip
• Auto off
• 3.1 mm stem for fast response
• 4.9 inch stem for insertion in liquids and semi-solids
• IP Rating IP67
• 3-year limited warranty

Application

• Ambient air
• Calibrate thermostats
• Vents
• Compressor heads
• Registers
• Grill and surface temperatures
• Serving temperatures

CAREKITPHCONL Probe Care Kit - pH & Conductivity by Bluelab

Probe cleaning is one of the most important parts of owning or operating any Bluelab® meter, monitor or controller.

The probe surface is where the instrument takes the reading of the solution or soil/media. If the probe face is dirty or contaminated, then the reading will be inaccurate.

Accurate readings simplify crop management and provide improved growth.

Use Bluelab® Solutions to re-stock your probe care kit.

Features

• 20ml / 0.67fl oz single-use Bluelab Solution Sachets, 2 each of: pH 7.0 & pH 4.0, KCl and 2.77 EC
• 3 plastic cups
• Bluela® pH Probe Cleaner
• Bluelab® Conductivity Probe Cleaner
• Bluelab® Toothbrush (pH probe cleaning instrument)
• Bluelab® Chamois (conductivity probe cleaning instrument)

SCT-108.001.31 SCT-THER-PEN-2 T-Bar Digital Stem Thermometer by ScichemTech

Features:

• Reliable SCT Tester for Temperature Measurements.
• T - Bar shaped - good design.
• Good - Temperature - max/min range.
• Option to select °F/°C.
• Option to select test / hold date.
• Sensing time 1 second.
• Stainless steel 133 mm probe.
• Protective plastic sleeve with clip for stainless steel.
• Battery operated with low battery indicator.

SO3371-P Sodium Oxalate, 0.0250M, 500mL by AquaPhoenix

• APHA for Nitrogen (Nitrite), 4500-B

Specifications

• Packaging Type: Glass
• Size: 500 mL

08068-47 Irreversible 4-Point Micro Horizontal Temperature Label, 320-351F; 10/Pk by Digi-Sense

Labels are made up of a series of temperature-sensitive elements sealed between heat-resistant substrates with transparent windows. Each element changes color distinctly as its rated temperature is met or exceeded. The changes to the label are irreversible, providing a temperature history of the surface being monitored. The labels will not delaminate when removed, allowing them to be attached to an inspection report to serve as a permanent record. Ideal for use in the food, automotive, molding and metal working industries. Accuracy is ±1.8°F below 212°F and ±1°F above 212°F. Shelf life: 1 year after date of purchase.

Reliable proof that the product was maintained at the correct temperature

• Used as a quick inspection tool that the product is in usable condition during the shipping and receiving process
• Save time and money due to costly recalls
• Self-adhesive design

MA9112 pH 12.45 Calibration Buffer Solution @ 25 °C : accuracy +/- 0.01 pH - 230 ml by Milwaukee

Probe calibration is a simple procedure for optimal performance and should be done any time your readings become suspect. Calibration should be performed at least once a month.

MA9112 is a lab grade pH 12.45 buffer solution certified to meet the standard to an accuracy of ±0.01 pH removing the inaccuracies involved with mixing buffers.

Milwaukee solutions are designed to help you achieve reliable and repeatable pH measurements while extending the life of your electrode.

DESIGN FEATURES

• pH 12.45 Calibration Buffer Solution (230 mL)
• Fundamental for the correct use of electrodes and for obtaining the most accurate and reproducible readings
• Sealed against light with air tight, tamper proof cap
• Ideal for fast calibration
• Simply open, pour into a beaker or container and insert the tester or electrode to start the calibration process.

SCT-108.001.30 SCT-THER-PEN-1 LCD Digital Multi-Thermometer by ScichemTech

Features:

• Reliable SCT Tester for Temperature measurement.
• Small design and display.
• Option to select °F/°C.
• Option to hold / test data.
• Auto shut-off in 60 minutes.
• Sensing time 1 second .
• 133mm. Stainless steel sensor probe protective plastic sleeve with clip.
• Battery operated with low battery indicator.

318C Calibratable Pocket Digital Thermometer with Chisel Tip by Test Products International

TPI's Pocket Digital Thermometers measure temperatures accurately and affordably. All "C" Version Pocket Digital Thermometers can be field calibrated in 32°F ice water to ±2°F!

Features

• Field calibrateable to ±2°F
• Rugged and waterproof (IP63)
• Chisel Tip
• Auto off
• -Magnetic clip perfect for air duct applications
• 3-year limited warranty

Application

• Ambient air
• Calibrate thermostats
• Vents
• Compressor heads
• Registers
• Grill and surface temperatures
• Serving temperatures

94256 USB Cooling Fan for Dobsonian Telescopes by Celestron

The Celestron USB Cooling Fan is the ideal cooling solution for your StarSense Exploerer 10" and 12" Dobsonian telescope. For those who can't wait to observe, this handy accessory cools the primary mirror to the ambient outdoor temperature faster. The result is crisper, better-focused views sooner – and more time for you to observe.

This cooling fan mounts directly onto the rear cell of the StarSense Explorer 10" and 12" Dobsonian and works with any USB power source (portable power banks, AC wall adapters, and more). Once the primary mirror has cooled down and you are ready to observe, you can disconnect the fan's USB power source. Connect the cable to the integrated storage clip to stay organized.

Powering the Cooling Fan

Any USB power source can charge the cooling fan. Unlike other fans on the market, this USB Cooling Fan for Dobsonian Telescopes does not require an external, bulky 12V power source or disposable batteries. This fan uses less voltage (5V vs. 12V) than competing models. Still, our rigorous internal testing shows that the Celestron Cooling Fan provides better airflow and faster overall cooling compared to competitors.

Compatible Telescopes

The USB Cooling Fan for Dobsonian Telescopes is compatible with the StarSense Explorer 10" and 12" Dobsonian telescope and many other third-party Dobsonians and Newtonian Reflectors that have a compatible fan mount (four M4 x 0.7 threaded holes in a square pattern with holes spaced 71.5mm apart).

• USB-operated cooling fan for StarSense Explorer 10" and 12" Dobsonian and other Dobs and reflectors with a compatible fan mount
• Speeds up the cooling of the primary mirror to the ambient air temperature resulting in crisper, better-focused views in less time
• Mounts directly to the rear cell of the StarSense Explorer 10" and 12" Dobsonian telescope
• Integrated storage clip to secure the USB cable when not in use

FS2120-P Fluoride Standard as F, 2.00 mg/L (ppm), 500mL by AquaPhoenix

Specifications

• Packaging Type: Poly
• Size: 500 mL
• Hardness: 2.00 ppm