Replacement Parts
Item
Part Number
Sensor with Filter
253846
Filter Kit
253847
Test Vial
253848
Brand/Chemical Name
Response
Clears
<30 seconds
Dextron Transmission fluid heated to 160 ºF
N
N/A
Quaker State Motor Oil heated to 160 ºF
N
N/A
Rain-X Windshield Wash Fluid
Y
Yes
Ford silicone lubricant
Y
Yes
Ford Rust Inhibitor (when wet)
Y
Yes
Ford Gasket Adhesive (when wet)
Y
Yes
Loctite Natural Blue degreaser (undiluted)
Y
Yes
Ford Brake Parts Cleaner (when wet)
Y
Yes
Ford Silicone Rubber (when uncured)
Y
Yes
Motorcraft Antifreeze heated to 160 ºF
Y
Yes
Gunk liquid wrench (when wet)
Y
Yes
Ford Spot Remover (when wet)
Y
Yes
Ford Pumice lotion (with mineral solvent)
Y
Yes
Ford Motorcraft brake fluid
Y
Yes
Ford Carburetor Cleaner (when wet)
Y
Yes
5
Product Specifications
Model #
D440A / D440A-C
Name
Leak Detector, Refrigerant Gas
Sensitivity
1,4 gr./0.05 oz./yr R134a
0.025 oz./yr R22
Sensor Life
> 300 hours
Response Time
Instantaneous
Power Supply
4 AA Alkaline batteries
Battery Life
8 hours continuous
Warm up time
< 20 seconds
Probe length
17 inches
Numerical Display
7 segment digital display (1 to 9)
Weight, lbs
1.5 lbs
Warranty
3 years (includes sensor)
Cross Sensitivity to Automotive Chemicals
Some automotive solvents and chemicals have similar hydrocarbon properties as R134a
and may elicit a positive response (<30 seconds) from the D440A / D440A-C. Before leak
checking, clean up any chemicals in the list below that elicit a positive response.
