Specifications
21
TRH-1000
FEATURES
• Low-cost tempera-
ture and RH logger
• Easy to use 
• No accessories
required
• 5-year battery life
• User selectable
sample method
and rate
• NIST certificates
available on spe-
cial request
PRODUCT SPECIFICATIONS
Size:
25.4 mm x 58.4 mm x 81.3 mm (1" x 2.3" x 3.2")
Weight:
74 g (2.6 oz)
Case Material:
Cycoloy
®
(GE Plastics) C120 ABS + Polycarbonate
Mounting:
Magnetic backing and security loop
Operating Limits:
-40 to 70°C (-40 to 158°F) and 0 to 100% RH (non-
condensing)
Clock Accuracy: 
+/- 2 seconds per day
Battery:
3.6 volt Lithium, 1 Amp-Hour
Battery Life:
5 years under normal use (factory replaceable)
Memory Size:
64 KB (32,640 readings per channel)
Sampling Methods*:
1. Continuous (First-in, First-out)
2. Stop when full (Fill-then-stop)
*Option to delay start
Sampling Rates*:
User selectable from 8 seconds to 34 minutes
*Readings stored to memory can be spot or averaged over the 
sample interval (except for the 8 second interval)
Resolution:
8-bit (1 part in 256)
PC Requirements:
IBM PC or 100% compatible running Windows® 3.1, 
'95, '98, 2000, Me, NT or XP with at least 2 MB RAM, 10 
MB of hard drive disk space and one free serial port
Software Requirements:
TrendReader® Express (included, see page 35 for 
details)
Certifications and Standards:
-  Certified to CE standard EN61326: 1997 + A1: 1998 
(European Emissions and Immunity) covering ESD, 
RFI, EFT/B, Surge, Conducted Immunity, and 
Voltage Dips and Interruptions 
- Meets FCC standard 47 CFR Part 15, Subpart B: 1999,
Class B (US Radiated and Conducted Emissions)
SENSOR SPECIFICATIONS
Internal Temperature/Relative Humidity Sensor:
Type: CMOSens
® 
(by Sensiron)
Temp Range: -40 to 70°C (-40 to 158°F)
Temp Accuracy: +/- 0.6°C @ 25°C (+/- 1.0°F @ 77°F)
+/- 2.0°C from -40 to 70°C 
(+/- 3.6°F from -40 to 158°F)
RH Range: 0 to 100% RH (non-condensing)
RH Accuracy: +/- 4% RH between 20 and 80% RH; 
otherwise +/- 5%
Calibration:
Factory calibration verification and NIST certificates are 
available upon special request.
The TRH-1000  is  a  low-cost, easy-to-use  temperature
and relative humidity data logger. With its precision cal-
ibrated  internal  temperature  and  relative  humidity
sensor, simply place the logger in the field and leave it
to  record. Once  the  desired  information  has  been
recorded, plug the logger into the serial port of your com-
puter  and  begin  downloading  and  viewing  the  logged
data with  ACR’s  TrendReader
® Express software. No
cables, wires  or  accessories are  required, making  the
TRH-1000  the  ideal  data logger  for  quick and  accurate
temperature and humidity measurements in a variety of
applications.
Two-Channel Temperature and Relative Humidity Data
Logger
Serial port plug
Built-in temperature and 
relative humidity sensors
Order Information
MODEL MEMORY  CATALOG #
TRH-1000 64 KB 01-0194










