$100 - $150

MH-18-PCH-A 18,000 BTU LP Portable Cabinet Heater by Master

Master's MH-18-PCH propane space heater delivers long-lasting, electricity free heat. Its compact design houses a propane tank within the heater itself, so it's easy to just roll around.

CSA Certified for use with a 20 lb LP Cylinder.

Three heat settings allow efficient use in a variety of locations.

Advanced safety features include tip-over shut-off, high temperature limit shut-off, flame-out fuel cut, a thermocouple and a robust safety guard. An LP cylinder hose and regulator are also included.

With no need for electricity, you can use the Master Propane Cabinet Heater anywhere. Great for camping, ice fishing, or a ventilated workshop, Master s Propane Cabinet Heater will heat up to 450 sq. feet, and can run continuously for 24-65 hours, depending on the heat setting.

• 3 variable heat settings
• Easily portable with 4 rolling casters (rear locking)
• Safety-tip over switch
• Piezo ignition
• Built-In ODS (Oxygen Depletion System) and safety tip-over switch
• Hose and regulator included

SCT-108.001.37 SCT-AIR-PEN-1 LCD Digital Air Pressure Meter by ScichemTech

Features:

• Reliable SCT Tester for Air Pressure, Altitude and Temperature Measurements.
• Clock with timer / alarm setting.
• Air Pressure & Altitude Display with Barograph.
• Graphic Display for weather forecast.
• Time, Display / Date.
• Battery operated with Low Battery Indicator.

WD-35617-50 Electrode Stand (Use with Electrodes up to 14 mm diameter) by Oakton

Holds up to four standard size electrodes (14-mm dia max) and one ATC probe. Weighted 6" dia base lets you pivot holder 360° for added convenience. Flexible arm lets you move electrode side-to-side or up-and-down while keeping electrode at a constant vertical angle.

• Hands free pH measurement

WD-00652-50 Traceable® Conductivity and TDS Standard, Individually-Tested, 1413 μS; 500 mL by Oakton

• Oakton® Traceable® conductivity and TDS standards have detailed labels: KCl, NaCl, and 442 conversions, temperature corrections, and certified values referenced to 25°C-convenient!!
• Average accuracy at 25°C is ±0.25 microsiemens for 1, 5, 10 microsiemen (μS) solutions, or ±0.25% for all other solutions. The tested uncertainty is shown on the certificate, whichever is greater
• Conductivity options range from 1 to 200,000 μS/cm
• Individually-tested solutions are certified by the bottle - each bottle is analyzed for the best accuracy

METHODS SUPPORTED

Certified reference material meets test requirements for Federal, State, and local agencies, CAP, ASTM, NCCLS, CLSI, ACS, CLIA, AOAC, EPA, APHA, AWWA, WEF, USGS, USP, and ISO. Traceable® Conductivity Standards complies with and is essential for use in these official methods: AOAC 973.40, EPA 120.1, Standard Method 2510 (APHA, AWWA, WEF), ISO 7888, DIN 38404, ASTM D1125, USGS I-1780, USP 645, and for A2LA/NVLAP accreditations/ISO 9000 certifications. Material may be used to calibrate all conductivity meters and to determine all conductivity cell constants.

A2LA ACCREDITATION ISO/IEC 17025:2005 (1750.01)

To assure accuracy an individually serial-numbered Traceable® Certificate is supplied to indicate traceability to standards provided by NIST (National Institute of Standards and Technology) and/or a National Standards Laboratory. A2LA accredited certification provides the highest achievable level of quality assurance, documentation, and accuracy. Conductivity Standards are produced in an A2LA accredited ISO/IEC 17025:2005 (1750.01) calibration laboratory. Additional certifications include ISO 31 (certificate content) and ISO 35 (statistical analysis), plus ISO 9001 (certified quality manufacturer).

• All Oakton® Traceable® conductivity standards are NIST-traceable reference materials
• Supplied with a calibration report from an ISO 17034 and ISO 17025 accredited laboratory
• These standard solutions let you calibrate conductivity instruments to ensure accuracy
• If unopened, shelf life is one year; once opened, shelf life will vary by solution value
• Use when readings are expected to be around 1413 μS/cm

INCLUDES

temperature compensation chart, TDS conversion chart, and NIST-traceable calibration certificate with data.

*Please note we can only ship RKI products to customers within the United States

pH619C pH/Temperature With Graphical Display & Replaceable pH Electrode by Jenco

VisionPlus pH619 fits the gap between the top of the line pH618N and the lower end pH630. With IP67 body, temperature readout, menu driven operation and replaceable electrode module. VisionPlus pH619 is a powerful and easy to use pH tester. Available in two different models: one for degree Celsius temperature readout and one for Fahrenheit temperature readout.VisionPlus pH619 is RoHS compliant.

• Graphical LCD provides on-screen menu selection for manual-free, easy operation.
• On-screen messaging displays useful information such as meter status, buffer selection and operation modes. no more guess work involving cryptic indictors or flashing digits.
• 4-button keypad provides intuitive operation with separate buttons for data hold, calibration.
• IP67 rated, water-proof dust-proof body.
• Glass bulb electrode exposes more measuring surface to solution for fast response time.
• Surface mounted temperature element improves temperature accuracy and response time.
• Clear LCD displays pH and temperature at the same time, along with meter status, calibrated buffers, status and date.
• Large temperature range for wide range of applications.
• 1,2, or 3 point calibration, with automatic buffer recognition of us and nist buffer sets.
• Calibration data is stored in memory, ready for use on power up, even when batteries are removed.
• Readings are automatically compensated for temperature (ATC).
• Data hold for convenient reading.
• Watertight case is ideal for rugged use. protective cover for pH electrode is included.
• Replaceable electrode module ensures extended usefulness.
• Belt clip which also attaches to neck strap.
• 1 year warranty.