| General Specifications | 
        
        
            | Designation | 
            TKRT 20 | 
        
        
            | Display | 
            Inverting vertical 5 digit LCD | 
        
        
            | Displayed resolution | 
            Fully auto ranging up to 0,001 digit or ±1 digit fixed | 
        
        
            | Memory | 
            Last reading held for 1 minute | 
        
        
            | Low battery indicator | 
            Yes | 
        
        
            | Auto switch off | 
            After 1 minute | 
        
        
            | Measurement | 
              | 
        
        
            | - Optical modes | 
            r/min and rps (also Count and Time interval) | 
        
        
            | - Contact modes | 
            r/min and rps, metres, yards, feet, per min and per sec | 
        
        
            | - Count modes | 
            total revs, metres, feet, yards | 
        
        
            | - Time interval | 
            in seconds between pulses (reciprocal rate) | 
        
        
            - Speed capture 
              feature | 
            Maximum, Minimum or Average rate | 
        
        
            | - Sampling time | 
            0,8 seconds or time between pulses 
            0,1 seconds auto-selection in Max or Min capture mode |