297
Service Tools
Multi-Function A/C & Refrigeration Gauge
Instant superheat, sub-cooling, temperature and pressure
readings at the touch of a button. Features built in R22 table
or ability to use plug-in refrigerant pressure-temperature
memory key. Pulsation proof and accurate at any elevation
from sea level to 16,000' without any adjustment. Only
by accurately determining the superheat or sub-cooling
value, can a system's critical charge be obtained to reach
maximum performance.
Digital Superheat & Sub-Cooling Gauges
Features
• Simple two button operation.
• Protected sealed touch buttons.
• R22 built-In, R410A key included.
• 300 psi maximum pressure.
• NIST traceable.
• Retracting hanging hook.
• Carrying case.
• Keys for all standard refrigerants.
• Available in °C or °F.
• Low battery indicator.
• Auto shut-Off after 60 min inactivity.
• 100 hours on (1) 9V alkaline (not included).
• 800 psi (5512 kPa) maximum pressure.
• 04-SH31N & SH34N include:
- 04-A34000 1/4" × 1/4" access.
- 6' dry/ wet bulb temperature sensor & socks.
Hand Held Digital
Superheat & Sub-Cooling Gauge
Part #
Description
04-SH31N
°F model & carrying case.
04-SH34N
°C 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-SH31N
Illustrated
Instantly Calculates
• Superheat
• Sub-cooling
• Temperature
• Pressure
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 Keys
• For 04-SH31N & 04-SH34N.
°F Part #
°C Part #
Description
°F Part #
°C Part #
Description
04-SK40012 04-SK50012
R12
04-SK40407C 04-SK50407C
R407C
R22 key usually built into instruments. R22
04-SK40408A 04-SK50408A
R408A
04-SK40134A 04-SK50134A
R134a
04-SK40409A 04-SK50409A
R409A
04-SK40401A 04-SK50401A
R401A
04-SK40410A 04-SK50410A
R410A
04-SK40401B 04-SK50401B
R401B
04-SK40411C 04-SK50411C
R411C
04-SK40402A 04-SK50402A
R402A
04-SK40414B 04-SK50414B
R414B
04-SK40402B 04-SK50402B
R402B
04-SK40416A 04-SK50416A
R416A
04-SK40404A 04-SK50404A
R404A
04-SK40500 04-SK50500
R500
04-SK40406A 04-SK50406A
R406A
04-SK40502 04-SK50502
R502
04-SK40407A 04-SK50407A
R407A
04-SK40507 04-SK50507
R507
04-SK40407B 04-SK50407B
R407B
04-SK40476 04-SK50476
RB276
Fahrenheit and Celsius keys are not interchangeable!
Superheat & Sub-Cooling Gauges
