$75 - $100

94052 Dew Heater Ring - 9.25" by Celestron

The Celestron Dew Heater Ring is the ideal dew prevention solution for your Celestron telescope. This must-have accessory will improve your observing or imaging nights year-round. The Dew Heater Ring permanently mounts to your 9.25" Celestron Schmidt-Cassegrain and EdgeHD optical tube, replacing your retaining ring, so you'll never be caught without it. The installation process is quick and easy (follow the manual for instructions).

How it works

The Dew Heater Ring replaces the plastic retaining ring on your Schmidt corrector lens for efficient heating across the lens. The ring is constructed of lightweight, durable aluminum. Its rigid frame supports the cable circuity and the telescope's Schmidt corrector lens. Unlike other heating bands or strips that inefficiently heat the lens cell to warm the glass, the Celestron Dew Heater Ring heats the corrector glass directly, providing the most efficient transfer of heat to prevent dew formation.

Simply plug the ring into an external 12V DC power source for consistent, continuous heat that will prevent dew from forming even under heavy dew conditions. The Dew Heater Ring features two storage clips to keep the power and thermistor jacks secure when not in use while accommodating the telescope's dust cover.

The Dew Heater Ring also comes with a cable management clip that connects to the telescope's front cell. Corral the power and thermistor jack to prevent them from dangling and reduce unwanted pulls on the cable connection to the rings.

The Dew Heater Ring comes complete with:

• Dew Heater Ring
• Cable management clip
• Power jack extension cable
• Paper installation shield

Enhance your setup

To achieve the highest level of dew prevention while maximizing power efficiency, we strongly recommend pairing the Dew Heater Ring with a Smart DewHeater Controller (sold separately). The controller uses the ring's built-in thermistor and its internal environmental sensor to provide just the right amount of heat to the corrector to prevent dew based upon the ambient temperature, ambient humidity, and temperature of the Schmidt corrector, which can dramatically reduce the ring's power draw, greatly increasing battery life. The ring also includes an extension cable for connecting the ring directly to one of the controllers' heater output ports, or to a third-party controller's heater output port. (Note: the ring's integrated thermistor is only compatible with the Celestron Smart DewHeater Controllers).

We also recommend adding a dew shield to your setup. While not mandatory, a shield will cut down on the amount of power the Dew Heater Ring needs to keep the optics clear.

• Heater ring provides the most efficient heating directly to the corrector lens to prevent the formation of dew
• Permanently mounts to your existing telescope tube for a seamless look–plus, you'll never forget to bring it with you
• Integrated thermistor continuously monitors the temperature of the corrector lens when used with the Celestron Smart DewHeater Controllers.
• Rigid, lightweight, and durable aluminum construction
• Included storage clip and cable management clip keep your cables organized

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

H-10-101-01 Benzene Colorimetric Gas Detection Tube, 0.5 - 10 ppmv Selective (5 Colorimetric Tubes and 5 Pre-Tubes) by RAE Systems

RAE Systems colorimetric gas detection tubes enable quick, on-the-spot measurement of a wide range of toxic and combustible gases and vapors. RAE Systems tubes are easy to read, and provide a sharp, clear color change directly corresponding to the concentration of gas present. RAE Systems tubes are compatible with the RAE Systems piston hand pump, a reliable way to draw samples of an exact volume required for the most accurate measurements.

Key Features

• Wide assortment of tubes available to detect over 300 gases and vapors
• Easyto use, even in multiple layers of gloves
• Easy-to-read with sharp,clearcolorchange
• No calibration or other maintenance required

Applications

• Oil and gas
• Chemicals and petrochemicals
• Agriculture and pestcontro
• Food and beverage production
• Environmental protection
• Fire service
• HazMat response
• Nationalsecurity

PERITUBE Peridoser Replacement Tubing 500mm by Bluelab

The Peridoser Tubing is replacement tubing for the Bluelab Peridoser pumps. It is easy to replace. No other types of tubing should be used. The tubing requires replacement approximately every 18 months to 2 years to ensure reliable performance.

The Peridoser Tubing is sold as pre-cut 500mm lengths (1.64 feet), the required length for each individual peridoser pump. One length is required per peridoser pump. For example; a Triple Peridoser requires three lengths, a Twin Peridoser requires two lengths and a Single Peridoser requires one length.

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

98766-03 Traceable Digital Stopwatch with Calibration by Digi-Sense

This precalibrated stopwatch is designed for ease of use and accuracy. Functions include single-event, time-out, time-in, cumulative split, interval split, and continuous roll-over time. Compact design with raised buttons fits comfortably in your hand.

The ABS plastic case was designed with tongue and groove craftsmanship, along with an O-ring, to seal out moisture, dust, and fumes encountered in harsh lab, plant, or field environments.

Products are calibrated to NIST-traceable standards and ready to use as soon as you receive it. Each product goes through an intense vetting process before it can carry the Traceable name, and it includes NIST-traceable certification. This means that a 17025-accredited calibration test lab has confirmed that the product meets or exceeds all stated specifications, saving you both time and money by not having to calibrate separately.

NIST-traceable calibration also helps you meet quality standards and regulatory compliance for ISO, FDA, cGMP, VFC, CAP, CLIA and Joint Commission requirements.

• Includes NIST-Traceable certificate from our A2LA accredited (1750.01) calibration laboratory
• Ideal for timing enzyme tests, viscosity measurements, animal studies, and other timed lab tests
• Simple design for ease of use
• Features large digits for easy readability
• Water-resistant to seal out moisture, dust, and fumes

Includes

One 1.5 V button cell battery, lanyard, and NIST-traceable calibration certificate with data.

Part Number: H197130LM5

EC59 Pocket-size Conductivity / TDS / Temperature Meter with Replaceable Electrode by Milwaukee

This new waterproof Pocket-size EC/TDS/Temp Meter include features such as a replaceable probe, temperature in °C or °F, automatic temperature compensation with adjustable ß, battery level indicator, stability indicator, automatic shut-off and automatic calibration all in a floating, waterproof casing.

EC59 shows on the dual-level LCD the EC (3999 µS/cm) or TDS (2000 ppm) value. It also displays the temperature from 0.0 to 60.0°C (or 32.0 to 140.0°F) on the secondary level at the same time.

0563 8051 805 Mini IR Thermometer with TopSafe by Testo

The compact 80 mm infrared thermometer fits into any pocket and is always within reach e.g. for measurements in Incoming goods and for checking the cold shelves in supermarkets. Also ideal for rapid measurements in the food industry and in the home.

Set includes:

• Mini infrared thermometer
• TopSafe
• Battery

• High accuracy in a critical area for food
• Packaging remains undamaged
• TopSafe is dishwasher-proof
• Display of minimum and maximum values
• Scan mode for permanent measurement
• Robust, waterproof protection case (IP65), optional
• Practical and compact, pocket-size
• High accuracy in the critical range for food
• Water-proof and robust on account of dishwasher-safe protection sleeve TopSafe (IP65)
• Minimum and maximum value display
• Scan mode for long-term measurements

0572 1560 174T Mini Temperature Data Logger, 1 channel, includes locking wall holder & batteries by Testo

The mini data logger for temperature, testo 174T, is ideal for accompanying transports. Simply positioned close to the goods, e. g. in containers and refrigerated rooms, the data logger monitors temperature continuously, securely and unobtrusively. The free software ComSoft testo 174 allows fast programming of the data logger and easy analysis.

• High data integrity, even with empty battery
• Large measurement data memory
• Watertight in accordance with IP65
• Compact and robust
• Conforms to EN12830
• Issue of alarms via display
• Data transfer to the PC via USB interface
• Reliable temperature measurement for the monitoring of cold chains and sensitive goods during storage and transport
• Easy readout of data and transfer to a PC via Testo USB interface

Package Includes: 6 Clips, 3 lead sets (hot & ground), ground lead and hold bar