$100 - $150, Oakton Instruments

WD-35805-06 Double-junction, Epoxy-body, Gel-filled pH Electrode (Use with all OAKTON pH meters except pH Wand and pH/CON 10) by Oakton

Use with any meter with a BNC connector

Choose a single junction electrode for field, clean water, and general purpose applications. Choose a double junction electrode for most applications, including dirty water, heavy metals and organics applications.

All electrodes have a BNC connector, and are 12 mm dia with a 3 ft cable (except submersible electrode, which is 25 mm dia with a 10 ft cable). We offer many other pH and ORP electrodes for specialty applications.

• Each 12 mm electrode includes a FREE electrode saver bottle to extend electrode life
• Use ORP electrodes with meters that read mV to take REDOX readings

WD-03313-70 Wall Mount Thermo-Hygrometer with Glass Thermometer by Digi-Sense

This compact instrument requires no batteries or power

Use this economical thermohygrometer for relative humidity and temperature readings in your lab, office, or computer room. It s small size makes it ideal for areas with limited space.

• Monitor humidity and temperature
• Features alcohol-filled thermometer with °F/°C temperature scales