$100 - $150

93428 X-Cel LX 1.25" 3x Barlow Lens by Celestron

When inserted between the eyepiece and telescope, this premium 3x Barlow lens triples the magnification of all your 1.25" eyepieces. This is a perfect accessory for owners of short, fast telescopes, and is especially helpful for boosting the magnification during lunar or planetary observations under good seeing conditions. The apochromatic, fully multi-coated optics offer great color correction and contrast.

The black anodized housing with orange highlights matches the eyepieces in the Celestron X-Cel LX line. A centralized rubber grip helps to keep your hands securely on the barrel, even when your fingers are cold or you are wearing gloves. A brass compression ring just inside the top of the X-Cel Barlow grabs your eyepiece gently but firmly when you turn the thumbscrew. Once the thumbscrew has been secured in place, the brass ring keeps your eyepiece in the Barlow instead of relying on the tip of the thumbscrew itself, offering a better and protecting the barrel from scratches.

The barrel of the Celestron X-Cel LX 3X Barlow is threaded to accept 1.25" filters, allowing you to change eyepieces without requiring you to remove and re-attach the filter from each eyepiece barrel.

• Quality X-Cel LX 3x Barlow triples the magnification of any 1.25" eyepiece, perfect for owners of fast, short focal length telescopes.
• 3-element apochromatic, fully multi-coated optics offer up bright, sharp images with excellent color correction.
• A rubber grip helps to avoid accidental drops.
• Barrel is threaded to accept standard 1.25" filters.
• A brass compression ring holds eyepiece firmly in place.

25560 Si-RM1 Wireless Pressure Probe by E Instruments

This Si-RM1 wireless pressure probe accurately measures high side and low side pressure. It measures relative pressure range from -1 to 60 bar and -14 to 870 psi and comes with Bluetooth low energy communication.

SI30UL01UN23 Si-30 Mini Condensate Removal Pump (5gph) 230V by Sauermann

The Si-30 is suitable for all air conditioners up to 5.6 tons (20 kW / 67kBtu). Specifically designed for lifting condensate and for its usability, the Si-30 is silent regardless of the volume of condensate.

• Patented Piston Technology
• Anti siphon, prolongs the life of the pump
• Quiet operation: 20 dBA

Kit content

• 1 Si-30 pump
• 1 Clear PVC tube int. 1/4 (6mm) – L: 3 ¼ (1m), fitted with a « Drain Safe Device » pre-mounted.
• 1 Anti-vibration mounting bracket
• 1 5ft (1.5 m) lockable plug-in power cable: 2 power wires, 2 safety contact wires.
• 1 6 tie wraps, 1/10" x 4" (2.5 x 100 mm)
• 1 Detection unit - SI2958, 5 ft (1.5 m) cable
• 1 Detection unit installation kit:rubber elbow 90°, vent tube, mounting rail, adhesive.

90551-17 Adjustable Angle Bimetal Thermometer, 5" Dial, 9" L, Range 0-250F/-20-120C by Digi-Sense

Accuracy is ±1% full-scale when stem is immersed 2" in liquids or 4" in gases (immerse models with a 2.5" stem length 2" in gases). Measured stem length from the top of the threads to the bottom tip of the stem. Stem dia is 0.25"; threaded connection is 1/2" NPT(M). All thermometers meet or exceed ASME B40.3 standards. Maximum environmental temperature for glass lens thermometers is 500°F (148°C).

• Greater temperature range
• Anti-parallax dial for accurate readings
• Hermetically sealed per ASME B40.3 standard to prevent fogging and protect against tough environments
• Rugged 304 stainless steel construction with a clear glass lens
• Recalibrate using the external reset screw

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

90550-40 Dampened Adjustable Angle Bimetal Thermometer, 3" Dial, 6" L/50-550F/10-290C by Digi-Sense

Accuracy is ±1% full-scale when stem is immersed 2" in liquids or 4" in gases (immerse models with a 2.5" stem length 2" in gases). Measured stem length from the top of the threads to the bottom tip of the stem. Stem dia is 0.25"; threaded connection is 1/2" NPT(M). All thermometers meet or exceed ASME B40.3 standards. Maximum environmental temperature for glass lens thermometers is 500°F (148°C).

• Dampened movement
• More economical than silicone gauges
• Greater temperature range than silicone-filled gauges
• Anti-parallax dial for accurate readings
• Eliminate the risk of a leaking case and cross-contamination
• Hermetically sealed per ASME B40.3 standard to prevent fogging and protect against tough environments
• Rugged 304 stainless steel construction with a clear glass lens
• Recalibrate using the external reset screw

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

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

90556-01 Bottom-Mount Bimetal Thermometer, 5" Dial, 24" L; Range; 0-250F/-20-120C by Digi-Sense

Accuracy is ±1% full-scale when stem is immersed 2" in liquids or 4" in gases (immerse models with a 2.5" stem length 2" in gases). Measured stem length from the top of the threads to the bottom tip of the stem. Stem dia is 0.25"; threaded connection is 1/2" NPT(M). All thermometers meet or exceed ASME B40.3 standards. Maximum environmental temperature for glass lens thermometers is 500°F (148°C).

• Greater temperature range
• Anti-parallax dial for accurate readings
• Hermetically sealed per ASME B40.3 standard to prevent fogging and protect against tough environments
• Rugged 304 stainless steel construction with a clear glass lens
• Recalibrate using the external reset screw

PANELCMKIT7.0TM Panel Fan Pole Mount 7" Collar with Hardware by Schaefer

A variety of mounting options are available to fit your needs ceiling, pole or post, wall, cart, pedestal and more.

For safety, fans mounted on fan carts and pedestals should be OSHA guarded.

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

52238 C70 Mini Mak Spotting Scope by Celestron

Celestron Mini Maks bring portability and versatility to a new level. The Maksutov optical design is recognized for being compact, easy to use, and applicable for both terrestrial (land) and astronomical use.

C70 Mini Mak is a small but powerful spotting scope that includes a tabletop tripod which has built-in slow motion controls, a built-in zoom eyepiece capable of 75x magnification, and soft carrying case.

• Maksutov-Cassegrain optical design with multi-coated optics
• 45° eyepiece - zooms up to 75x
• 1.25" eyepiece adapter allows usage of any 1.25" eyepiece
• Table top tripod
• Soft carrying case
• Limited Lifetime Warranty

90550-41 Dampened Adjustable Angle Bimetal Thermometer, 3" Dial, 9" L/0-250F/-20-120C by Digi-Sense

Accuracy is ±1% full-scale when stem is immersed 2" in liquids or 4" in gases (immerse models with a 2.5" stem length 2" in gases). Measured stem length from the top of the threads to the bottom tip of the stem. Stem dia is 0.25"; threaded connection is 1/2" NPT(M). All thermometers meet or exceed ASME B40.3 standards. Maximum environmental temperature for glass lens thermometers is 500°F (148°C).

• Dampened movement
• More economical than silicone gauges
• Greater temperature range than silicone-filled gauges
• Anti-parallax dial for accurate readings
• Eliminate the risk of a leaking case and cross-contamination
• Hermetically sealed per ASME B40.3 standard to prevent fogging and protect against tough environments
• Rugged 304 stainless steel construction with a clear glass lens
• Recalibrate using the external reset screw