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Murphy LM500-TF機油油位保持器包括一個測試功能，通過一次按下測試按鈕即可確認浮子和開關(guān)均正常工作。LM500系列保持發(fā)動機、泵或壓縮機的曲軸箱油位。調(diào)整到正確的運行油位后，它將在使用時補充機油。如果供油中斷且設(shè)備繼續(xù)用油，低液位開關(guān)將報警和/或關(guān)閉設(shè)備。

產(chǎn)品特性：
測試功能（TF選項）：可對浮球及開關(guān)的性能進行測試
可采用直接安裝方式（DM選項）
低液位報警采用3線制輸出信號(可用常開或常閉)
較LM2000系列有更大的玻璃視窗
視窗采用內(nèi)部密封較之前的邊緣密封可靠
簡單的安裝方式
全長度的高度調(diào)整插槽
可選ATEX防爆認證
不銹鋼浮球
連接口規(guī)格
3個連接口都是 3/4 NPTF
更大的蛙眼視窗
方便檢查的綠色條帶

規(guī)格性能參數(shù)：
Crankcase Balance Vent Connection: 1/2 NPTF (top). 
Inlet Connection: 1/2 NPTF removable screen (side). 
Outlet Connection:
2 x 3/4 NPTF (side)
1 x 3/4 NPTF (bottom)

Thumb-Valve Material: Viton. 
Snap-switch: SPDT rating 10 A, 125 VAC; 0.5 A, 125 VDC; 10 A, 30 VDC. 
Wire leads: 18 AWG x 14 in. ± 2 in. (355 mm) length.
Conduit Connection: 1/2 inch conduit (female, top). 
Case: Die cas aluminum 
Lens: Clear “Frog Eye” non-staining, high impact, high temperature polycarbonate; UV and heat stabilized. 
Dial: High visibility white background with solid green band for normal level indication. 
Maximum Inlet Pressure: 9.50 psi/25 ft. oil (head pressure). 
Maximum Case Pressure: 15 psi (103 kPa). 
Maximum Differential: 2 in. (51 mm) between running and stopped. 
Maximum Ambient Temperature: 250°F (121°C). 
Float: 304 Stainless Steel 
Flow Rates: Refer to LM500 Series Flow Rates chart for application data. 
Dimensions: Overall 6-9/16 inch tall x 6-3/16 inch deep x 3-1/2 deep.
For exact dimensions, refer to document “00-02-0729 LM500 Installation Instructions”. 

LM500/LM500-TF Shipping Dimensions: 9.5 x 7.5 x 11 in. (241.3 x 190 x 279.4 mm). 
LM500/LM500-TF Shipping Weight: 3 lbs. 13.44 oz (1.74 kg)