Extech Conductivity Meter, case and probes, FREE SHIPPING,

RISEPRO - Digital Sound Level Meter 30 – 130 dB Audio Noise Measure

Extech Instruments 695 PH Conductivity TDS Temperature Meter FREE SHIPPING

EXTECH Digital pH Transmitter Model 402006 1984

EXTECH Instruments HW30 HeatWatch Humidity and Temperature Stopwatch

(1) Used Extech Model RH520 Humidity and Temperature Recorder

pH electrode Extech instruments - New

Bruel & Kjaer Type 2204 Precision Sound Level Meter With Accessories