$200 - $300

0638 1557 External Vacuum Probe for Testo 557 by Testo

This external vacuum probe for the testo 557 is designed to provide faster and more reliable evacuation measurements from 0 to 20,000 microns. This external vacuum probe features a secure connection, and is suitable for use on all refrigeration systems and heat pumps.

S271CD-ORP ORP Sensor, Platinum, 3/4" NPT, PPS by Sensorex

This series of electrodes is designed to provide an economical multi-purpose solution for in-line or submersion ORP measurements. Based on our proven S500C-ORP polished tip or S550C-ORP extended tip or S350CD-ORP flat surface technology, these rugged and durable electrodes are available in Ryton nipples with 1/2" or 3/4" NPT threads; or in our durable epoxy body with or without quick disconnect top caps. Choose from single or double junction designs, flat or recessed measuring surfaces, and cable lengths and connectors as required.

• Economical design for in-line or submersion use
• Choose from single or double junction models
• Threaded 1/2" or 3/4" NPT connections
• High purity platinum measuring surfaces
• Special models for low ionic and other specialty applications available

WD-27504-28 Cole-Parmer® Combination Ion-Selective Electrode (ISE), Silver/Sulfide(Ag+/S2) by Oakton

Whether your application involves end point determinations in potentiometric titrations or continuous monitoring of specific ions, we can help you find the right electrode for the job. These fast and accurate electrodes do not require an external reference - they're easier to use than separate sensing and reference half-cell electrodes. All Cole-Parmer electrodes are double-junction combination ion-selective electrodes and are convenient to use in places where two electrodes won't fit. All electrodes include a 30-mL bottle of reference solution, a reference filling pipette, 1-m cable, BNC connector, and an instruction manual. Solid-state electrodes also have twelve polishing strips.

Economy Epoxy Electrodes have a durable epoxy body and are well-suited for portable field applications. Outer reference chamber is silver-free and resists contamination. These electrodes are refillable.

Laboratory Glass Electrodes are double-junction in design, with a glass body that provides high-quality measurements for your laboratory applications. Improved glass seal enhances performance and reliability. Sealed inner junctions and refillable outer junctions accommodate special reference fill solutions - ideal for low-concentration measurements. Use electrodes with a meter that has a resolution of 0.1 mV for the most accurate results. Many meters in our "pH/Ion Meters" section have 0.1 mV resolution; several also give direct readings in ppm. For monitoring ions not listed below, call our Application Specialists for more electrode application information.

• Cost-effective choices that are easy to use
• Easily fit into small spaces - no additional reference electrode is needed
• Silver/Sulfide (Ag⁺/S^-2) ISE with epoxy body

S354CDHF-ORP pH/HF Electrode, Din 13.5mm Cap, no cable by Sensorex

The specification sheet serves as an addendum to the pH LabSpecs sheet and covers all lab pH electrodes suitable for use in hydrofluoric acid.

Specifications differences for use in hydrofluoric acid (HF) are shown in SPECIFICATIONS section below. Please note 2 major differences as compared to standard electrodes. First, pH range is 0-12 not 0-14. Second, the temperature range is 0-50 deg C.

This series of electrodes are compatible with any lab or portable pH meter. Calibration of these electrodes is as normal with any standard pH electrode using standard pH buffer solutions.

• Resist attack and etching from HF (up to 2% v/v)
• Resist coating and fouling
• Compatible with any pH meter

*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

90452-05 Precision Industrial PRT, 0.187" x 9", -60~160C, Spade by Digi-Sense

AM1610 Series - Precision industrial PRT/RTD probes: Conform to the standard 385 curve, letting you use your DIN/IEC RTD meters fully. Manufactured using a special aged and tested 5mm long sensing element to achieve the best performance in stability and repeatability. All have an accuracy of 35 mK at 0°C and short-term stability of 10 mK at 0°C. The AM1610 has a temperature range of -60 to 160°C (-76 to 320°F)

*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

AI3161 LabSen 241-180 Glass-body pH Electrode for NMR Tubes (3mm diameter, 180mm length) by Apera

Built with proprietary sensor technology and premium materials from Switzerland, Apera LabSen 241-180 Glass Micro pH Electrode is designed for micro-volume samples in slim containers such as NMR tubes (minimum sample volume: 50 microliters).

LabSen Glass Membrane - LabSen 241-180 pH electrode adopts an ultra-long 180mm micro cylindrical glass membrane (ø3mm), making NMR tube pH measurement easier than ever. And it can be tested at high-temperature up to 212°F. The low-resistance membrane (<450MΩ) helps you quickly get a fully stabilized reading.

Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of the reference system and extends the electrode's service life.

The electrode uses a standard BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera Instruments MP500) to enable ATC or manually input temperature to achieve temperature compensation.

• Proprietary pH sensor technology and premium materials from Switzerland
• Low-resistance LabSen® 180mm*&oslah;3mm micro cylindrical glass membrane, ideal for NMR tubes and other slim containers (minimum sample volume: 50 microliters)
• Long-Life Reference System, improving the stability of the reference and extends the electrode's service life

90130-09 Solar-Powered Adjustable-Angle Fahrenheit Thermometer; 9" L by Digi-Sense

View readings from almost any angle by simply adjusting the angle of the head. Three-inch diameter adjustable head has an easy-to-read LCD. Requiring no batteries these thermometers are ideal in pilot plant or research and development applications where exact readings are required. The safety circuit prevents false readings. Each thermometer is housed in a weather-resistant 304 stainless steel (SS) case. Stem is 304 SS. An acrylic lens protects the face. To further protect thermometer order a thermowell from page 1052. Simply match the stem length to the probe depth "A" for the thermowell.

1455400 Silica Test: Hach Color Disc High Range by AquaPhoenix

• Popular in many industrial applications, such as boiler turbines that are susceptible to scale
• Provides fast results with an easy-to-carry test kit
• Simple, low-cost color disc method is the most accurate visual test kit method

Includes four reagents, deionized water, viewing tube, stopper, color comparator box, color discs, bottle dropper, instruction sheet, and carrying case.

Range 1: 0 - 30 mg/L SiO2
Range 2: 0 - 600 mg/L SiO2

90445-60 High-Ranger TD, 3-Wire, 100 Ohm, 1/4" OD, 2" L, Al/SST, 0.1% by Digi-Sense

These RTD assemblies consist of a single Low Range or High Range Wire Wound element constructed of 316 Stainless Steel sheath material, assembled together with an Aluminum screw cover connection head.

• 316 Stainless steel sheath material
• 1/2"' X 1/2"' NPT stainless steel hex nipple for head mounting fittings
• Aluminum screw cover connection head
• Low range or high range wire wound elements
• .00385° C temperature coefficient
• Custom built assemblies available upon request

90131-04 Solar-Powered Adjustable-Angle Celsius Thermometer; 4" L by Digi-Sense

View readings from almost any angle by simply adjusting the angle of the head. Three-inch diameter adjustable head has an easy-to-read LCD. Requiring no batteries these thermometers are ideal in pilot plant or research and development applications where exact readings are required. The safety circuit prevents false readings. Each thermometer is housed in a weather-resistant 304 stainless steel (SS) case. Stem is 304 SS. An acrylic lens protects the face. To further protect thermometer order a thermowell from page 1052. Simply match the stem length to the probe depth "A" for the thermowell.

90452-07 Precision Industrial PRT, 0.187" x 9", -60~160C, 5-Pin Din by Digi-Sense

AM1610 Series - Precision industrial PRT/RTD probes: Conform to the standard 385 curve, letting you use your DIN/IEC RTD meters fully. Manufactured using a special aged and tested 5mm long sensing element to achieve the best performance in stability and repeatability. All have an accuracy of 35 mK at 0°C and short-term stability of 10 mK at 0°C. The AM1610 has a temperature range of -60 to 160°C (-76 to 320°F)