Bluelab Combo Meter parchment paper Simply put your put in

Simply put your put in the 8"x8" insert

This detector can activate alarm relays

11″ x 19

The SV-1029 Safety Shut Off Valve 3/8 inch automatically shuts off the gas supply in the room or at the tank for several of our devices in case of a high-gas alert

875″ x 10

Bluelab Combo Meter parchment paper Simply put your put inMeasure pH, conductivity and temperature on the go Measures pH, conductivity and temperature on the go Brilliantly simple design thats easy to use, clean and calibrate Backlit display to capture every measurement with ease Includes a pH Probe and Conductivity Probe to cover all your nutrient uptake fundamentals 2 metre cable for measuring in hard to reach locations Customise scales to your preference conductivity in EC, CF, PPM 500 (TDS) or PPM 700;