$200 - $300

Quick and Simple In-field GasTest and Calibration Solution by Crowcon

The Q-Test requires no power and is therefore ideally suited to remote users. Crews can now complete their functional check immediately prior to entry ensuring they are compliant. The power enabled option allows users to charge Gas-Pro on the move. Multiple mounting options and cylinder holder will enure that Gas-Pro is ready to protect workers when needed.

WD-35660-88 PH300 pH Sensor Head; 2-m Cable by Oakton

For your convenience, calibration standards, sensor heads, and sensor cartridges are available for your Oakton meters.

• Suitable for use with Oakton 300 series smart meters and meter kits

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

AI3151 LabSen 241-3SP Glass-body Micro pH Electrode for Micro-Volume Solutions Containing Proteins by Apera

Backed by proprietary Swiss sensor technology and premium materials, LabSen 241-3SP Glass Micro pH Electrode is designed for micro-volume samples (≥30 microliters) containing proteins such as serum and microbiological samples. With the ultra-micro container (sold separately), it can test as low as 15 microliters.

Unique Glass Membrane – LabSen 241-3SP pH electrode adopts a micro cylindrical sensor tip (top end ø3mm, stainless steel ø4mm), making micro-sample pH testing easier than ever, and can be tested in high-temperature samples (up to 212°F). The stainless steel protective shaft ø4mm) ensures the durability of the slim glass tube.

Protelyte electrolyte – A specialized oily reference solution made for protein solutions and viscous samples.

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 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® micro cylindrical glass membrane, suitable for micro-volume pH measurement (>30 microliters)
• Protelyte electrolyte made for protein-containing solutions such as serum and microbiological samples.
• The stainless steel protective shaft ensures the durability of the slim glass tube
• Long-Life Reference System, improving the stability of the reference and extends the electrode's service life
• With the micro container (sold separately), it can test as low as 15 microliters.

AI3155 LabSen 851-S Glass-body pH Electrode for Highly Viscous Solutions by Apera

LabSen 851-S pH electrode is designed for high-accuracy pH measurement of highly viscous samples such as coatings, syrups, resin, glue, and etc.

The pre-pressurized structure allows the electrolyte to stably flow out even in highly viscous samples so as to ensure reliable measurements.

LabSen S-type glass membrane - fast response and is 10 times stronger than traditional glass membranes, saving the electrode from accidental damage.

The electrode uses a 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 MP500) to enable ATC or manually input temperature to realize temperature compensation.

• Proprietary sensor technology and premium materials from Switzerland
• The low-impedance S membrane ensures a fast response and is yet impact resistant.
• Pre-pressurized reference system for smooth electrolyte flow
• Silver Ion Trap Reference System ensures a stable reference potential and long service life.
• Lead-free glass body

S267CD-ORP ORP Sensor, Platinum, 3/4" NPT, PPS, DJ 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