4. Digital Manometers Daho Products, Digital Indicators Digital manometers ODi-3G_63mm, 1.0% ODi-4G_80mm, 0.4% ODi-4H_80mm, 0.2% ODi-5G_100mm, 0.4% ODi-5H_100mm, 0.2% ODi-5P_100mm, 0.1% ODi-5HP_100mm, 0.05%