The Series 490A Hydronic Differential Pressure Manometers are versatile, handheld, battery operated manometers available in several basic ranges for positive or positive differential pressure measurement and can tolerate most liquid media compatible with 316LSS. A new feature added to the Series 490A is a field adjustable damping, which allows the user to choose the level of display averaging rate corresponding to the fluctuation level common in many applications.
The Series 490A-HKIT features the 490A Hydronic Differential Pressure Manometer and all the necessary attachments and accessories to meet all your balancing, measuring, and pressure needs.
The hydronic meter kit includes: two (2) six foot high-pressure rated tubing with shut off valves, one (1) high pressure 3-way valve two (2) controlled bleed valves,, one (1) 8 ft poly tubing for purges, one (1) hard travel case, one (1) handheld carrying strap, two (2) 1/16 in x 1-1/2 in pressure gage adapters, two (2) 1/8 in x 3 in pressure gage adapters, two (2) 1/8 in x 1-1/2 pressure gage adapters, two (2) male 90° flare to 1/4 in NPT fittings, two (2) male flare to 1/4 in NPT couplet fittings, one (1) adjustable 8 in wrench, PTFE Tape, one (1) magnetic protective rubber boot. NIST Calibration Certificate comes standard.
| Service | Compatible gases & liquids |
| Wetted Materials | Without valve: 316L SS, 3V option: 316LSS, Buna-N, silicone, grease, PTFE, brass 360, copper, reinforced acetal copolymer. HKIT Option: 316LSS, PTFE, Brass, Copper |
| Accuracy | ± 0.5% FS, 60°F - 78°F (15.6 to 25.6°C); ± 1.5% FS from 32°F - 60°F and 78°F - 104°F (0°C - 15.6°C and 25.6°C - 40°C) |
| Pressure Hysteresis | ± 0.1% FS |
| Pressure Limits | See chart on catalog page |
| Electronic Temperature Limits | 32°F - 140°F (0 to 60°C) |
| Process Temperature Limits with -HKIT | -20°F - 180°F |
| Storage Temperature Limits | -4°F - 176°F (-20°C - 80°C) |
| Display | 0.42 in (10.6 mm) 4 digit LCD |
| Resolution | See chart on catalog page |
| Power Requirements | 9 V alkaline battery, installed non-functional, user replaceable |
| Process Connections | Two (2) 1/8 in (3.18 mm) female NPT; HKIT Option: Two (2) male 45 Flare 1/4 in |
| Weight | 14.1 oz (400 g) |
| Agency Approvals | CE |
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