476A型 數顯壓力計 于實驗室或研究機構，它為單壓測量，范圍從-20到20英寸水柱，精度為1.5%。它是為暖通空調工程公司而設計，可用于調整供風壓力，校準和設定壓力開關，調整減壓器，系統平衡測試等。采用鋁合金外殼，牢固耐用。
    478A系列數顯差壓計可用于測量正壓，負壓或差壓。它的功能包括：可選工程單位，自動較零，數據保持，峰谷值記錄。按住Hold保持鍵可將當前數據保持顯示。478A帶有零點按鍵可隨時較零。

技術參數 ：

Service: Air and compatible gases.
Wetted Materials: Consult factory.
Accuracy: ±1.5% Full Scale @ 72°F (22.2°C). Includes linearity and repeatability.
Pressure Hysteresis: ±0.1% of Full Scale.
Pressure Limits: 5 psig (.34 bar).
Temperature Limits: 0 to 140°F (-17.8 to 60°C).
Compensated Temperature Limits: 32 to 104°F (0 to 40°C).
Thermal Effect: 0.05% F.S./°F.
Display: 4 digit LCD (.425"H x .234"W digits).
Power Requirements: 9 V alkaline battery, installed non-functional, user replaceable.
Process Connections: Barbed connection for use with 3/16" or 1/4" I.D. tubing.
Weight: 10.8 oz (306 g).
Agency Approvals: CE.

選項及配件 ：

●A-402A - Nylon carrying pouch for various digital manometers - 7-1/2" x 3" x 2-1/4".
UHH-C1 - Soft carrying case
●A-201 - Rubber latex tubing has less tendency to kink in storage and occupies less space, thus is best for portable work. 3/16" ID, 9' length.