This conductivity meter from RS works on a 9V battery and comes with a case.
Technical specifications:
Control range: 200uS – 20mS
Temperature range: 00C – 60 0C
Accuracy: ± 6% + 2 dgt
External dimensions (W) x (D) x (H): 72 x 32 x 180 mm
Weight incl. battery: 350 grams
