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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 (PT100/500/1000) or current (0/4-20mA) 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.
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  • 1, 4 or 8 channel panel mounted datalogger.
  • Up to 8 inputs 0/4-20mA or PT100/500/1000 temperature inputs.
  • 2 electronic relay outputs.
  • USB host port for flash data storage and configuration transfer
  • RS485/Modbus RTU
  • Free configuration and recording software (Loggy Soft and S-Toolkit).

The device has the memory capacity of 2 MB (0.5 million data recordings altogether) or 8 MB in version with USB port (2 millions data recordings). 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. For example: 1GB flash drive allows continuous data recording for over 1 year (8 channels recorded every 1 sec., approx 250 millions data recordings)! 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.


Graphic LCD, 128 x 64 points, with backlight

Measuring inputs:

1, 4 or 8, PT100; PT500; PT1000 (2 and 3-conductor connection) or 0/4-20mA inputs; common ground

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

Measuring range:

± 9999 + decimal point (current inputs); -100°C +600°C (RTD inputs) with resolution 0,1°C

Digital input:

1 input 24V DC, used to control logging function

Sensors supply:

24 V DC±5% / 200 mA (only mA version, not separated from measuring inputs

Communication interface:

RS-485 (MODBUS RTU) or USB Host port, galvanically isolated

Transmission speed:

1200 - 115200 bit/sec.

Memory capacity:

  • 2 MB (0,5 million data recordings)
  • 8 MB (above 2 million data recordings) in version with USB Host

Type of protection:

version without USB: IP65 (front), available options: additional frame IP65 for panel cut-out sealing, door STD-99

version with USB: IP40, IP54 (when STD-99 transparent door with security key is installed)

Working temperature:

0°C to +50°C

Storage temperature:

-10°C to +70°C



Case material:


Case dimensions:

96 x 96 x 100 mm

Panel cut-out dimensions:

90.5 x 90.5 mm

Installation depth:

min. 102 mm

Board thickness:

max. 5 mm


Availability: In stock

Price range : £292.05 - £502.62

Price as configured: £292.05

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Price as configured: £292.05


Part Builder

Description       SRD-99 data logger with LCD display, with large digit, graph and table view, one pulse (digital) input for controlling the recording process, RS485 Modbus RTU connection and 2 relay outputs. The unit is programmable for logging rates from 1 second - 60 minutes. Units come complete with Loggy Soft and S-Toolkit Software CD

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.

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
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Lockable transparent door, IP54 for SRD-99 and CMC-99 data loggers.
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Mini USBs
8GB USB memory stick. Allows the STD-99/141 lockable door to be closed with a USB memory stick in the front port.
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