HPLC Detectors Compared: UV, Refractive Index and Fluorescence
A quick guide to which HPLC detector fits which analysis.
PLC North
Autosampler Carryover: Causes and Fixes
Why peaks from one sample show up in the next, and how to reduce it.
Buying Used Laboratory Equipment: A Verification Checklist
What to ask and check before you buy a used instrument.
ConFlat (CF) Flanges: Copper Gaskets and Bake-Out Basics
How CF flanges seal in ultra-high vacuum, and the habits that keep them leak-tight.
GC Inlet Maintenance: Liners, Septa and O-Rings
What to change on a gas chromatograph inlet, and the signs it is time.
HPLC Pump Pressure Fluctuations: Causes and Quick Checks
A short troubleshooting path for unstable HPLC pump pressure before you call for service.
How to Size a Recirculating Laboratory Chiller for Your Instrument
Cooling load, temperature stability and fluid compatibility: the three checks before you choose a lab chiller.
Siemens S7-300 Still Running? How to Keep It Alive or Plan the Move to S7-1200/1500
The S7-300 is in phase-out, but thousands are still productive. Here is how to decide between stocking spares and migrating.
How to Read a Siemens Order Number (6ES7 Explained)
A quick guide to decoding Siemens MLFB order numbers so you can order the right module the first time.
Choosing a Siemens HMI Panel: Basic, Comfort or Legacy Operator Panels?
A short guide to picking the right Siemens HMI panel for a replacement or a new machine.