Omega Products HH42 User Manual

Ultra-High Accuracy and

Extended Warranty

Program

SM

Resolution Handheld Thermistor
Thermometer

HH40 Series

Starts at

$

425

Standard

No Points

⻬ Works with Standard

OMEGA®“400” Series
Thermistor Probes with
Phone Jack Termination

⻬ Ultra-High Accuracy, up

to ±0.015°C (±0.027°F)

⻬ Includes NIST-Traceable

Calibration Certificate

⻬ High Resolution,

up to 0.01°F or °C

⻬ -20 to 130°C (-4 to 266°F)

Temperature Range

⻬ Model HH42 has

RS232 Communications

⻬ Hold Function, Auto

Shut-Off, Rate of Change
Arrow Indicators,
Over/Under Range and
Low Battery Indication

HH41, $425, shown with
ON-403-PP, $70, tubular stainless
steel thermistor probe, sold
separately. See page D-19.

The HH41 handheld thermistor
thermometer is a rugged, field
tested unit that fits a wide variety
of temperature measurement
applications requiring ultra-high
accuracy and high resolution at an
economical price. The HH41
accepts OMEGA’s 400 Series
thermistor probes with phone jack
termination. The HH41 features
display hold and °F/°C selection
from the single front panel tactile

Applications

⻬ R and D Labs
⻬ Metrology Labs
⻬ Industry

OMEGACARESMextended
warranty program is available for
models shown on this page. Ask
your sales representative for full
details when placing an order.
OMEGACARE
labor and equivalent loaners.

SM

covers parts,

feedback silicone function button.
The unit’s LCD display features a
low battery indication and also rate
of temperature change arrows
which, flashing at different speeds,
inform the operator of the rate at
which the temperature is changing.
The unit has internal jumpers to
disable selection of °F or °C from
the front panel and enable display
of either °F or °C only. Internal
jumpers are also present to select
either auto or manual shut-off mode.
In the auto shut-off mode, the
unit will automatically shut off
10 minutes after the last function
key entry. Model HH42 has all the
features of the HH41 with the addition
of RS232 communications.In
situations where very high system
accuracy is required, OMEGA offers
a total system calibration service
(probe plus meter); ask for CAL-4.

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Specifications

Accuracy: See Instrument

Accuracy vs. Temperature Table
on next page
Resolution: See Display Resolution
Table below
Repeatability: 0.002
to 0.01°C (-20 to 70°C);

0.004 to 0.02°C (-4 to 158°F)
typical for 1 week at constant
ambient temperature

Temperature Range:

-20 to 130°C (-4 to 266°F)

Reading Rate: 2 per second
Display: 4
Power: 9 Vdc battery, alkaline

(included), optional 110 Vac or
220 Vac adaptor
Battery Life: 20-hour, typical,
alkaline battery
Battery Indicator: Displays flashing
battery indicator when less than
1-hour of battery life remains

1

⁄2 digit LCD

For Complete

Listing of Thermistor

Probes See

Section D

C

D

E

F

A

B

G

H

Instrument Accuracy*
vs. Temperature

Temp °C (°F) Accuracy °C (°F)

-20 (-4) ±0.016 (0.029)

-10 (14) ±0.015 (0.027)
0 (32) ±0.015 (0.027)

10 (50) ±0.015 (0.027)
20 (68) ±0.015 (0.027)

30 (86) ±0.015 (0.027)
40 (104) ±0.017 (0.031)
50 (122) ±0.019 (0.034)
60 (140) ±0.023 (0.041)
70 (158) ±0.029 (0.052)
80 (176) ±0.037 (0.067)
90 (194) ±0.049 (0.088)

100 (212) ±0.066 (0.119)
110 (230) ±0.088 (0.158)
120 (248) ±0.117 (0.211)
130 (266) ±0.156 (0.281)

* Ambient temperature: 18 to 28°C (64 to 82°F).

Display Resolution

Temp Range Resolution

°C (°F) °C (°F)

-20 to 102 0.01 (0.01)
(-4 to 215)

102 to 130 0.02 (0.05)

(215 to 266)

OMEGA

400 Series
standard connector

Temperature Unit Selection:

°F/°C selectable from front panel
function button, or internal jumpers
to enable °F or °C only
Shut-Off Mode: Internal jumper
selection for auto or manual shut-off
mode; auto shut-off in 10-min with
no function key entry
Thermistor Sensor: Works with
OMEGA
(2252 Ω) probes with

®

400 Series thermistor

1

⁄4" phone jack

(Model PPM-2) connection

®

400 Series thermistor probes (sold separately).

A: ON-401-PP, general purpose probe, $50
B: ON-401-PP-V, flexible probe, $50
C: ON-403-PP, immersion probe, $70
D: ON-404-PP, glass probe, $140
E: ON-405-PP, air temperature probe, $70
F: ON-408-PP, surface temperature probe, $130
G: ON-409-PP, surface temperature probe, $62
H: ON-410-PP, 1/8 NPT probe 4.5" long, $70

Operating Ambient: 10 to 40°C

(50 to 104°F); 0 to 85% RH

RS232 Communications:

9600 baud, no parity

Case Material: ABS
Dimensions:

184.1 H x 83.8 W x 31.8 mm D
(7.25 x 3.30 x 1.25")
Weight: 312 g (11 oz)

AVAILABLE FOR FAST DELIVERY!

To Order (Specify Model Number)

Model No. Price Description
HH41 $425 Handheld thermistor thermometer
HH42 499 Handheld thermistor thermometer with

RS232 communications

Accessories

Model No. Price Description
HH40-AC $56 110 Vac adaptor for HH41 or HH42

HH40-AC220 65 220 Vac adaptor for HH41 or HH42
HH40-SOFT 99 Software for HH42
SC-HH500 12 Soft case for HH41 or HH42
RCC-1000 40 Rugged attache style case for HH41 or HH42

plus probes

MN1604 3 Spare alkaline battery

Comes complete with 9 Vdc alkaline battery, NIST-traceable calibration certificate (no data
points), and operator’s manual. HH42 comes with built-in RS232 connector.

Ordering Example: HH41, thermometer, and HH40-AC,110 Vac adaptor, $425 + 56 = $481.
OCW-3, OMEGACARESMextends standard 1-year warranty to a total of 4 years ($106),
$425 + 106 = $531.

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