Functional Features

Automatic range: Provides high resolution and accuracy in the low-pressure range when needed.
Automatic shutdown: Automatically shuts down after 40 minutes to save battery
Stable mode: The stable function is used to stabilize readings. It will display the average of the first four readings.
Zero Return Function: Provides a quick one click zero return function
Record maximum and minimum: can measure gas pressure for a long time in order to
Check for leaks (only SS20, SD20)
Keep function: can freeze display (only SS20, SD20)
Units: can be converted into various measurement units as follows:
KPa, PSI, InHg, mmHg, inH2O, mmH2O, mbar (only ss20 and SD20)

SS10 and SS20 are single headed. SD10 and SD20 are double headed
This image shows the dual head SS10 SS20 SD10 SD20

Automatic range -40.0mbar to+120.0mbar
Accuracy ± (0.5% reading+5 digits)
Overpressure of 500mbar
Power supply 9V
Relative humidity 0% -80% (0 ℃ to+40 ℃)
Operating temperature (0 ℃ to+40 ℃)
Storage temperature (-10 ℃ to+50 ℃)
Automatic shutdown after 40 minutes
Input Type Single Differential Differential
Stable mode Yes Yes Yes Yes Yes
Zero adjustment YES YES YES YES
Record minimum/maximum NO YES NO YES
Number of units of air pressure that can be displayed: 1 7 1 7
Data retention NO YES NO YES
The 7 units are: KPa, PSI, InHg, mmHg, inH2O, mmH2O, mbar

Attachments and specifications:

Standard Attachment Part Number
9V battery
A009
Soft box
A600
Optional accessory part number
2-meter rubber hose A601
Large compression box A904
9V lithium battery U9VL