M-Series Air Breathers
Heavy Duty Applications
M-Series breathers are designed from heavy duty materials capable of handling the requirements of the most severe environments. They replace the standard breather cap or vent tube on tanks and reservoirs. Pipe threads on the bottom standpipe make the units easy to install.
All M-Series designs have 2 micron pleated filters and silica gel bags that are easily replaced.
The M-Series design features our proprietary Splash Sentry. This device is included in all M-Series models and prevents foaming or splashing fluids from entering the breather during normal operating conditions.
Typical applications include:
- Heavy duty off-road equipment
- Mobile equipment
Case Study
Due to poor oil cleanliness, a manufacturing operation had to change gearbox oil annually. They were using a standard air filter on all gearboxes. After switching to Air Sentry® M-107 breather they were able to more than double the life of the gear oil, resulting in a savings of nearly $4,000 per year per gearbox.
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Sizing Information
| Model |
Height in. (cm) |
Diameter in. (cm) |
Mounting Connection |
Weight lbs. (kg) |
Water Capacity fl.oz (mL) |
Maximum Air Flow cfm |
Maximum Reservoir Fluid Flow gpm |
Type of Medium |
| M-103 |
6.6 (16.8) |
10 (25.4) |
1 inch male NPT |
8.4 (3.8) |
12 (355) |
35 |
262 |
2 Micron Pleated Filter/ Silica Gel |
| M-104 |
6.6 (16.8) |
10 (25.4) |
2 inch male NPT |
9 (4.1) |
12 (355) |
120 |
900 |
2 Micron Pleated Filter/ Silica Gel |
| M-105 |
12 (30.5) |
10 (25.4) |
1 inch male NPT |
14 (6.4) |
26 (770) |
35 |
262 |
2 Micron Pleated Filter/ Silica Gel |
| M-106 |
12 (30.5) |
10 (25.4) |
2 inch male NPT |
16 (7.3) |
26 (770) |
120 |
900 |
2 Micron Pleated Filter/ Silica Gel |
| M-107 |
13.5 (34.3) |
16 (40.6) |
3 inch male NPT |
41.5 (18.9) |
128 (3785) |
300 |
2250 |
2 Micron Pleated Filter/ Silica Gel |
| M-203 |
6.6 (16.8) |
10 (25.4) |
1 inch male NPT |
7.4 (3.4) |
– |
15 |
112 |
2 Micron Pleated Filter/ Carbon |
| M-204 |
6.6 (16.8) |
10 (25.4) |
1 inch male NPT |
8 (3.6) |
– |
15 |
112 |
2 Micron Pleated Filter/ Carbon |
| M-205 |
12 (30.5) |
10 (25.4) |
1 inch male NPT |
12 (5.5) |
– |
15 |
112 |
2 Micron Pleated Filter/ Carbon |
| M-206 |
12 (30.5) |
10 (25.4) |
2 inch male NPT |
14 (6.4) |
– |
50 |
375 |
2 Micron Pleated Filter/ Carbon |
| M-207 |
13.5 (34.3) |
16 (40.6) |
3 inch male NPT |
36 (16.4) |
– |
125 |
938 |
2 Micron Pleated Filter/ Carbon |
Replacement Filters and Gel
| Model Number |
Replacement Silica Gel Bag # |
Weight of Silica Gel Bag lbs. (kg) |
Replacement Activated Carbon Bag # |
Weight of Activated Carbon Bag lbs. (kg) |
Replacement Polyester Pleated Filter # |
Filter Weight lbs.(kg) |
| M-103 |
095A201 |
3.0 (1.4) |
– |
– |
095A204 |
2.0 (.9) |
| M-104 |
095A201 |
3.0 (1.4) |
– |
– |
095A204 |
2.0 (.9) |
| M-105 |
095A202 |
4.0 (1.8) |
– |
– |
095A205 |
3.0 (1.4) |
| M-106 |
095A202 |
4.0 (1.8) |
– |
– |
095A205 |
3.0 (1.4) |
| M-107 |
095A203 |
18.0 (8.2) |
– |
– |
095A206 |
5.0 (2.3) |
| M-203 |
– |
– |
095A207 |
2.0 (.9) |
095A204 |
2.0 (.9) |
| M-204 |
– |
– |
095A207 |
2.0 (.9) |
095A204 |
2.0 (.9) |
| M-205 |
– |
– |
095A208 |
3.0 (1.4) |
095A205 |
3.0 (1.4) |
| M-206 |
– |
– |
095A208 |
3.0 (1.4) |
095A205 |
3.0 (1.4) |
|
