296
Service Tools
Instantly Displays
• Superheat
• Sub-cooling
• Temperature
• Pressure
Multi-Function A/C & Refrigeration Gauge
Instant superheat, sub-cooling, temperature and
pressure readings at the touch of a button. Comes
with built in R22 table, R410A refrigerant key,
04-A34000 quick coupler access tee, 6' dry/ wet
bulb temperature sensor and socks. The 04-SH35N
features selectable 1 or 24 hour memory. The high,
low and average values are saved in all four modes.
Only by accurately determining the superheat or
sub-cooling value, can a system's critical charge be
obtained to reach maximum performance.
The Superheat method of refrigerant charging is used
with evaporators equipped with piston type expansion
devices or capillary tube (non TXV). The subcooling
method if primarily used for residential and commercial
air conditioning systems which have a TXV expansion
device but do not have a liquid refrigerant receiver.
Pulsation proof and accurate at any elevation from sea
level to 16,000' without any adjustment.
Digital Superheat & Sub-Cooling Gauges
Features
• 1 and 24 hour memory!
• Saves high, low and average values.
• Simple two button operation.
• Protected sealed touch buttons.
• R22 built-In, R410A key included.
• NIST traceable.
• Retracting hanging hook.
• Carrying case.
• Keys for all standard refrigerants.
• Low battery indicator.
• Auto shut-Off after 60 min inactivity.
• 100 hours on (1) 9V (not included).
- For low temperature applications use lithium battery.
• 800 psi (5512 kPa) maximum over pressure.
Hand Held Digital
Superheat & Sub-Cooling Gauge
Part #
Description
04-SH35N
°F model & carrying case.
Replacement Parts & Accessories
Part #
Description
04-SH51
28" temperature sensor extension.
04-SH54
6' temperature sensor.
04-SH55
Replacement plastic carrying case.
04-SH56
Socks (5/pk)
04-A34000
1/4" quick coupler × 1/4" access.
04-A34000 recommended for charging hook-up.
Not intended for use on hazardous or corrosive fluids.
04-SH35N
Illustrated
Pressure Display Range
29 InHg to 600 psig. (-98kPa to 4134 kPa).
(±1 psi to 200 psi, 0.5% to 600 psi).
Temperature Display Range
-40°C to 93°C (-40°F to 200°F).
Operating Temperature
-12°C to 49°C (-10°F to 120°F).
(±1°F *32°F/120°F, ±1.5°F *-10°F/32°F ).
Refrigerant Data Source
NIST REFRPRO software and
manufacturers data.
A/C & Refrigeration Applications
Checking TXV Setting
• The objectives of the TXV superheat setting is to prevent liquid
refrigerant from flooding back to the compressor and to optimize system
operation by the use of a selected setting.
• The 04-SH35N measures true superheat. The two temperature method
of measuring superheat is not recommended. It can produce a wrong
superheat measurement due to the effect of temperature glide of the
blended refrigerants and variations in evaporator pressure drop. Contact
your TXV manufacturer for the exact superheat adjust rate.
Retrofitting Systems
• Retrofitting systems to a new refrigerant can change the TXV superheat
setting. The superheat setting should be checked before and after
retrofitting to be sure the superheat is right for the equipment.
Refrigeration Applications
Set Superheat For Hunting TXV Valves
• In refrigeration and air conditioning systems, the expansion valve often
operates to produce an evaporator superheat which constantly swings up
and down in value, called "hunting". The 04-SH35N provides the "average"
superheat value to use for TXV valve adjustment.
Setting For Pressure Controlled Cases & Coolers
• Obtain accurate high, low and average evaporator pressure under EPR
control. Accurately test for the cut-in/ cut-out setting of the system's low
pressure control.
Setting For Thermostat Controlled Cases & Coolers
• Accurate verification of high, low and average temperatures over a period of
time.
1 & 24 Hour
Memory!
Saves High, Low and
AverageValues
Ideal For
Refrigeration
Applications
Superheat & Sub-Cooling Gauges
