$100 - $150

90490-03 Adjustable Angle Bimetal Thermometer, 3" Dial, 2.5" L/50-300F/10-150C 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

93451 Ultima Edge - 15mm Flat Field Eyepiece - 1.25" by Celestron

See the whole picture with Ultima Edge. These flat-field eyepieces were designed to provide an ultra-sharp, ultra-clear, crisp image from the center all the way to the edge of the field of view. The 15mm Ultima Edge eyepiece features fully multi-coated optics and an 8- element lens design, maximizing light transmission.

The Ultima Edge 15mm has a generous 65° field of view perfect for viewing planets, stars and the Moon's surface. This eyepiece provides higher-powered magnification, perfect for those times when you want to get up close to smaller objects.

Body

The 15mm Ultima Edge eyepiece's main housing is machined from high grade aluminum with a black anodized outer surface.

Its 1.25" mounting barrel is internally threaded to accept threaded to accept standard 1.25" filters and adapters. It is compatible with 1.25" star diagonals and focusers. On the exterior of the eyepiece, you will find a uniquely designed, molded rubber grip ring for non-slip handling during observing sessions.

Viewing through the 15mm Ultima Edge eyepiece is comfortable for both eyeglass wearers and non-eyeglass wearers alike, thanks to the rubber eyecups and long eye relief of 16mm.

Convenient Parfocal Design

Spend more time observing and less time focusing! When you buy more than one Ultima Edge eyepiece, you can switch between them without refocusing thanks to their parfocal design. With a set of Ultima Edge eyepieces in your kit, you'll be able to enjoy a wide range of high and low power views–and switch between them quickly and easily. That means you can get more out of every observing session.

NOTE: Ultima Edge 24mm is not a parfocal eyepiece. Ultima Edge eyepieces are only parfocal within the line and do not maintain focus when swapped with parfocal eyepieces from other brands or series.

• 15mm parfocal Ultra Flat Field eyepiece designed for 1.25" focusers
• Incredibly crisp views from center to edge of field
• Fully multi-coated, 8-element lens design for excellent light transmission
• Wide 65° apparent field of view allows you to see more of the night sky
• Generous 16mm eye relief and fold-down rubber eyeguard for comfortable viewing with or without eyeglasses
• Molded rubber grip ring for non-slip handling

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

ORP1000-AU Polycarbonate Laboratory ORP Sensor, Gold, SJ, Green BNC by Sensorex

The ORP1000 polycarbonate ORP sensor performs reliably in applications such as swimming pool monitoring and aquarium monitoring. Durable construction ensures this sensor stands up to the usual wear and tear.

Features:

• Choose basic, advanced, or premium options based on your application
• Virtually unbreakable with durable polycarbonate or Ultem® bodies
• Compatible with any meter accepting a BNC
• Accurate and reliable REDOX potential measurements
• Instantly ready for use: Extended shelf life (guaranteed for one year)
• One year limited warranty

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

HH8595-P Hydroxylamine Hydrochloride Solution, 500mL by AquaPhoenix

• APHA for Iron, 3500-B

Specifications

• Packaging Type: Glass
• Size: 500 mL

*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

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