Omni Instruments
contact icon+44 (0) 1382 443000
+44 (0) 845 9000 601

Contact our technical sales team now to discuss your requirements

help icon
MY BASKET basket arrow


My Cart

You have no items in your shopping cart.

Click basket to edit.


Latest added news blog
MSR175 Shock Transportation Data Logger
Kenny Laidlaw
Oct 01,2018
The MSR175 shock transportation data logger is the newest miniature logger from MSR.  The MSR175 more >
SRD-99 Data Logger
  • SRD-99 Data Logger
  • SRD-99 Data Logger - PT100 Input

SRD-99 Data Logger Display Unit

Quick Overview

The SRD-99 data logger is designed to record signal inputs and display current values in graphs and numeric form. The SRD-99 is equipped with 1, 4 or 8 input channels, suitable for either temperature (RTD or Thermocouples) or analogue (0/4-20mA or 0-10V) inputs across all available channels. A pulse (digital) input for controlling the recording process and 2 relay alarm outputs driven by single or group of channels with individually adjustable thresholds for each channel. A USB Host port is available for flash data storage and configuration transfer. The SRD-99 will also interface with RS485/Modbus RTU networks. Internal memory for up to 3 million readings.
View Options



  • 1, 4 or 8 channel panel mounted datalogger.
  • Universal inputs RTD or thermcouple temperature inputs or analogue current and voltage inputs
  • 2 electronic relay outputs.
  • USB host port for flash data storage and configuration transfer
  • RS485/Modbus RTU
  • Memory for up to 3 million readings
  • Free configuration and recording software (Loggy Soft and S-Toolkit).

The device has the memory capacity of 8 MB (3 million data recordings altogether). However when a USB flash drive is plugged permanently, it can significantly extend the recording time without a need of data transferring from SRD-99 to a PC. The logging rate is programmable from 1 second to 60 minutes.

The Loggy Soft program enables the visualization, archiving and printing of measurements (e.g. temperature, humidity, pressure) stored in the MultiLog device memory.

The S-Toolkit software enables configuration reading and writing operations, updating the device firmware and obtaining basic information on the MultiLog series devices through RS-485 serial interface or flash-disk devices plugged into USB port.


Power Supply Voltage:

19V ÷ 50V DC or 16V ÷ 35V AC
85 ÷ 260V AC/DC
Power Consumption: 7 VA typical; 12 VA Max.
Display: Graphic LCD, 128 x 64 points, with backlight (SRD-99A: Amber or SRD-99W: White)
Measuring Inputs:

Analogue (current or voltage): 0/4-20mA or 0/1-5V or 0/2-10V
RTD: PT100, PT500 or PT1000
Thermocouple: Types K, J, N, S, T, R, B or E.
Measuring Range:

Analogue (current or voltage): ± 9999 + decimal point, resolution >1mV
RTD: -100.0°C +600.0°C with resolution 0,1°C; -148°F +999,9°F with resolution 0,1°F
Thermocouple: -200°C ÷ +1370°C (K); -50°C ÷ +1768°C (S); -210°C ÷ +1200°C (J); -200°C ÷ +400°C (T); -200°C ÷ +1300°C (N);
-50°C ÷ +1768°C (R); +250°C ÷ +1820°C (B); -200°C ÷ +1000°C (E)
Sample Rate: 1s, 2s, 5s, 10s, 15s, 20s, 30s, 1 min, 2 min, 5 min, 10 min, 15 min, 20 min, 30 min, 60 min.
Logging Modes Stop when full or memory wrap
Digital Input: 1 input 24V DC, used to control logging function
Relay Outputs: 2 Electronic relays (ER1, ER2) Max 24vAC (35vDC) @ 200mA.
Sensors Supply: 24vDC±5% / 200 mA (only analogue version, not separated from measuring inputs
Communication Interface: RS-485 (MODBUS RTU), USB PC or USB Host port, galvanically isolated
Transmission Speed: 1200 - 115200 bit/sec.
Memory Capacity: 8 MB (up to 3 million data records). May be expanded using USB Host and memory stick.
IP Rating:

IP65 front protection (rear USB version) or IP40 (front USB version),
Optional IP65 frame for panel cut-out sealing as well as IP54 transparent door with key available
Working Temperature: 0°C to +50°C, -20 to +50°C option.
Storage Temperature: -10°C to +70°C, -20°C with option.
Case Dimensions: 96 x 96 x 100mm, panel cut-out dimensions 90.5 x 90.5mm
Installation Depth: min. 102 mm
Board Thickness: max. 7 mm


Availability: In stock

Price range : £340.84 - £586.86

Price as configured: £340.84

* Required Fields

Price as configured: £340.84


Part Builder

Description       SRD-99 data logger with 2.9" LCD display, with large digit, graph and table view options. One pulse (digital) input for controlling the recording process, internal memory for up to 3 million readings. RS485 Modbus RTU connection and 2 relay outputs. Selectable logging rates from 1 second to 60 minutes. Dimensions 96 x 96 x 100mm. Units come complete with Loggy Soft and S-Toolkit Software.

Components / Downloads

For further information, technical advice, or a quotation please call or email us. If you are not sure which product you need one of our technical sales advisors will be happy to discuss your application. We also accept company purchase orders by fax or post. Credit card orders can also be placed over the phone for any product.

SRD-99 Data Logger
SRD-99X Data Logger
SRD-99X Data Logger
SRD-99X Multichannel data logger with backlit White or Amber LCD display. Options for mA / V input or RTD/Thermocouple inputs on 1, 4 or 8 channels. RS485 Modbus RTU communications and 2 relay outputs. Selectable logging rates from 1 second - 60 minutes. Internal 8MB memory, expandable via USB socket. Dimensions 96 x 96 x 100mm. Units come complete with Loggy Soft and S-Toolkit Software.
View FileMulticon Brochure
   Size: (534.39 KB)

Not Available online

SRD-99 Single Channel Recorders with 2 Relay Outputs
Single channel SRD-99 Data Recorder & Process Indicator for 4-20mA inputs. The unit RS-485 Modbus RTU connection and 2 Relay Outputs. 85-260vAC power supply and an internal 2 MB memory (0.5 million data readings).
View FileDatasheet
   Size: (308.24 KB)
or call us for a quote
Lockable transparent door, IP54 for SRD-99 and CMC-99 data loggers, as well as SWP-99 and SWT-99 panel mounted displays..
or call us for a quote
Mini USBs
MF-16 Mini pendrive USB memory stick. 16GB capacity. Allows the STD-99/141 lockable door to be closed with a USB memory stick in the front port.
or call us for a quote